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1

Image processing for teaching  

NASA Astrophysics Data System (ADS)

The Image Processing for Teaching (IPT) project provides a powerful medium to excite students about science and mathematics, especially children from minority groups and others whose needs have not been met by traditional “coded” ways of teaching these subjects. Using professional-quality software on microcomputers, students explore a variety of scientific data sets, including biomedical imaging, Earth remote sensing and meteorology data, and planetary exploration images. They also learn about the many mathematical concepts that underlie image processing, such as coordinate systems, slope and intercept, pixels, binary arithmetic, along with many others. We have developed curriculum materials in all areas of mathematics and science for the upper elementary and secondary levels, allowing this tool to be used across a variety of grade levels and student interests. Preliminary indications show image processing to be an effective and fun way to study the application of science and mathematics to “real world” applications, as represented by digital imagery. The use of image processing is also an effective method with which to engage students in inquiry and discovery learning.

Greenberg, R.; Kolvoord, R. A.; Magisos, M.; Strom, R. G.; Croft, S.

1993-09-01

2

Teaching software development of digital image processing based on VB  

Microsoft Academic Search

In order to make the student easily understand the image processing theory and combine theory teaching with practical teaching of this technology, it is very important to develop a set of software suitable for teaching. This paper discusses image processing technique based on Visual Basic (VB) and a set of teaching software of digital image processing is developed by this

Dou Zhenhai; Wang Yajing; Chen Wengang

2010-01-01

3

Teaching digital image processing with Khoros  

Microsoft Academic Search

As digital image processing has moved into the electrical engineering mainstream, it has become a popular course in the undergraduate curriculum. Since visual perception is a key component of image processing, an effective first course should emphasize laboratory experience. The Khoros software system offers an interactive environment to facilitate such a course

Gregory W. Donohoe; Patrick F. Valdez

1996-01-01

4

Image Processing for Teaching: Transforming a Scientific Research Tool into an Educational Technology.  

ERIC Educational Resources Information Center

Describes the Image Processing for Teaching (IPT) project which provides digital image processing to excite students about science and mathematics as they use research-quality software on microcomputers. Provides information on IPT whose components of this dissemination project have been widespread teacher education, curriculum-based materials…

Greenberg, Richard

1998-01-01

5

Teaching Effectively with Visual Effect in an Image-Processing Class.  

ERIC Educational Resources Information Center

Describes a course teaching the use of computers in emulating human visual capability and image processing and proposes an interactive presentation using multimedia technology to capture and sustain student attention. Describes the three phase presentation: introduction of image processing equipment, presentation of lecture material, and…

Ng, G. S.

1997-01-01

6

The teaching of computer programming and digital image processing in radiography.  

PubMed

The increased use of digital processing techniques in Medical Radiations imaging modalities, along with the rapid advance in information technology has resulted in a significant change in the delivery of radiographic teaching programs. This paper details a methodology used to concurrently educate radiographers in both computer programming and image processing. The students learn to program in visual basic applications (VBA), and the programming skills are contextualised by requiring the students to write a digital subtraction angiography (DSA) package. Program code generation and image presentation interface is undertaken by the spreadsheet Microsoft Excel. The user-friendly nature of this common interface enables all students to readily begin program creation. The teaching of programming and image processing skills by this method may be readily generalised to other vocational fields where digital image manipulation is a professional requirement. PMID:9726504

Allan, G L; Zylinski, J

1998-06-01

7

C++ class library for teaching and research in image processing  

NASA Astrophysics Data System (ADS)

The 'Class Library for Image Processing' (CLIP) provides object-oriented programming facilities in a framework that supports user migration from C. CLIP augments the C/C++ built-in types with just three additions: the picture, the integer range, and the value range. Associated with these are overloaded operators for arithmetic on and between the types. Range limiting is implemented as a modification of conventional indexing. Pel-by-pel and block-by-block iterations are conveniently handled within the picture and range objects, and via callbacks. Each type incorporates error handling. The target users for CLIP will accept object-orientation only it if allows them to save on development time, after minimal learning, without compromising program execution speed. CLIP programs are compact, the required knowledge of C++ is elementary, and the class library's public interface is small. Speed is kept high by minimizing the amount of data in temporary objects, reducing the dynamic memory management overhead. Picture- or block-wide operations and callbacks are efficiently supported by ordering iterations to minimize the number of counter and pointer increments.

Robinson, John A.

1996-02-01

8

Teaching image processing and pattern recognition with the Intel OpenCV library  

NASA Astrophysics Data System (ADS)

In this paper we present an approach to teaching image processing and pattern recognition with the use of the OpenCV library. Image processing, pattern recognition and computer vision are important branches of science and apply to tasks ranging from critical, involving medical diagnostics, to everyday tasks including art and entertainment purposes. It is therefore crucial to provide students of image processing and pattern recognition with the most up-to-date solutions available. In the Institute of Electronics at the Technical University of Lodz we facilitate the teaching process in this subject with the OpenCV library, which is an open-source set of classes, functions and procedures that can be used in programming efficient and innovative algorithms for various purposes. The topics of student projects completed with the help of the OpenCV library range from automatic correction of image quality parameters or creation of panoramic images from video to pedestrian tracking in surveillance camera video sequences or head-movement-based mouse cursor control for the motorically impaired.

Koz?owski, Adam; Królak, Aleksandra

2009-06-01

9

Teaching High School Science Using Image Processing: A Case Study of Implementation of Computer Technology.  

ERIC Educational Resources Information Center

Outlines an in-depth case study of teachers' use of image processing in biology, earth science, and physics classes in one high school science department. Explores issues surrounding technology implementation. Contains 21 references. (DDR)

Greenberg, Richard; Raphael, Jacqueline; Keller, Jill L.; Tobias, Sheila

1998-01-01

10

Teaching high school science using image processing: A case study of implementation of computer technology  

NSDL National Science Digital Library

Outlines an in-depth case study of teachers' use of image processing in biology, earth science, and physics classes in one high school science department. Explores issues surrounding technology implementation. Contains 21 references.

Greenberg, Richard; Raphael, Jacqueline; Keller, Jill L.; Tobias, Sheila

2005-10-21

11

A self-teaching image processing and voice-recognition-based, intelligent and interactive system to educate visually impaired children  

NASA Astrophysics Data System (ADS)

A self teaching image processing and voice recognition based system is developed to educate visually impaired children, chiefly in their primary education. System comprises of a computer, a vision camera, an ear speaker and a microphone. Camera, attached with the computer system is mounted on the ceiling opposite (on the required angle) to the desk on which the book is placed. Sample images and voices in the form of instructions and commands of English, Urdu alphabets, Numeric Digits, Operators and Shapes are already stored in the database. A blind child first reads the embossed character (object) with the help of fingers than he speaks the answer, name of the character, shape etc into the microphone. With the voice command of a blind child received by the microphone, image is taken by the camera which is processed by MATLAB® program developed with the help of Image Acquisition and Image processing toolbox and generates a response or required set of instructions to child via ear speaker, resulting in self education of a visually impaired child. Speech recognition program is also developed in MATLAB® with the help of Data Acquisition and Signal Processing toolbox which records and process the command of the blind child.

Iqbal, Asim; Farooq, Umar; Mahmood, Hassan; Asad, Muhammad Usman; Khan, Akrama; Atiq, Hafiz Muhammad

2010-02-01

12

SSMiles: Using Models to Teach about Remote Sensing and Image Processing.  

ERIC Educational Resources Information Center

Presents an introductory lesson on remote sensing and image processing to be used in cooperative groups. Students are asked to solve a problem by gathering information, making inferences, transforming data into other forms, and making and testing hypotheses. Includes four expansions of the lesson and a reproducible student worksheet. (MKR)

Tracy, Dyanne M., Ed.

1994-01-01

13

A NOVEL APPROACH FOR TEACHING DIGITAL IMAGE PROCESSING BASED ON A NEW MULTI-SCALABLE HARDWARE PLATFORM  

Microsoft Academic Search

This paper highlights the capabilities and significance of a new multi-scalable hardware platform developed at image processing research group of the Ilmenau University of Technology. The main objective is a combination of theory and practice in the education of image processing. The use of image processing for measurement tasks becomes more frequently. The aspect like a camera works is taught,

Maik Rosenberger; Mathias Schellhorn; Martin Correns; Maik Schuhmann; Michael Vogel; Gerhard Linss

14

Image Processing  

NASA Technical Reports Server (NTRS)

Electronic Imagery, Inc.'s ImageScale Plus software, developed through a Small Business Innovation Research (SBIR) contract with Kennedy Space Flight Center for use on space shuttle Orbiter in 1991, enables astronauts to conduct image processing, prepare electronic still camera images in orbit, display them and downlink images to ground based scientists for evaluation. Electronic Imagery, Inc.'s ImageCount, a spin-off product of ImageScale Plus, is used to count trees in Florida orange groves. Other applications include x-ray and MRI imagery, textile designs and special effects for movies. As of 1/28/98, company could not be located, therefore contact/product information is no longer valid.

1993-01-01

15

Teaching: A Reflective Process  

ERIC Educational Resources Information Center

In this article, the authors describe how they used formative assessments to ferret out possible misconceptions among middle-school students in a unit about weather-related concepts. Because they teach fifth- and eighth-grade science, this assessment also gives them a chance to see how student understanding develops over the years. This year they…

German, Susan; O'Day, Elizabeth

2009-01-01

16

Teaching Image-Processing Concepts in Junior High School: Boys' and Girls' Achievements and Attitudes towards Technology  

ERIC Educational Resources Information Center

Background: This research focused on the development, implementation and evaluation of a course on image-processing principles aimed at middle-school students. Purpose: The overarching purpose of the study was that of integrating the learning of subjects in science, technology, engineering and mathematics (STEM), and linking the learning of these…

Barak, Moshe; Asad, Khaled

2012-01-01

17

Image Processing  

NASA Technical Reports Server (NTRS)

The Computer Graphics Center of North Carolina State University uses LAS, a COSMIC program, to analyze and manipulate data from Landsat and SPOT providing information for government and commercial land resource application projects. LAS is used to interpret aircraft/satellite data and enables researchers to improve image-based classification accuracies. The system is easy to use and has proven to be a valuable remote sensing training tool.

1991-01-01

18

Linear Algebra and Image Processing  

ERIC Educational Resources Information Center

We use the computing technology digital image processing (DIP) to enhance the teaching of linear algebra so as to make the course more visual and interesting. Certainly, this visual approach by using technology to link linear algebra to DIP is interesting and unexpected to both students as well as many faculty. (Contains 2 tables and 11 figures.)

Allali, Mohamed

2010-01-01

19

Learning to Use Geographic Information Systems and Image Processing and Analysis to Teach Ocean Science to Middle School Students  

NASA Astrophysics Data System (ADS)

This presentation will provide a middle school teacher's perspective on Ocean Explorers, a three-year project directed at teachers and schools in California. Funded by the Information Technology Experiences for Students and Teachers (ITEST) program at the National Science Foundation, Ocean Explorers is giving support to teams of teachers that will serve as local user groups for the exploration of geographic information systems (GIS) and image processing and analysis (IPA) as educational technologies for studying ocean science. Conducted as a collaboration between the nonprofit Center for Image Processing in Education and the Channel Islands National Marine Sanctuary, the project is providing mentoring, software, equipment, funding, and training on how to design inquiry-based activities that support achievement of California's standards for science, technology, mathematics, and reading education. During year two of Ocean Explorers, the teams of teachers will begin to use GIS and IPA as tools for involving their students in original research on issues of interest to their home communities. With assistance from the Ocean Explorers project, the teachers will create inquiry-based activities for their students that will help their school achieve targeted standards. This presentation will focus on plans by one teacher for involving students from St. Mary's Middle School, Fullerton, California, in tracking of ocean pollution and beach closures along the Southern California coast.

Moore, S. D.; Martin, J.; Kinzel, M.

2004-12-01

20

Digital Image Processing  

Microsoft Academic Search

This paper describes the basic technological aspects of Digital Image Processing with special reference to satellite image processing. Basically, all satellite image-processing operations can be grouped into three categories: Image Rectification and Restoration, Enhancement and Information Extraction. The former deals with initial processing of raw image data to correct for geometric distortion, to calibrate the data radiometrically and to eliminate

Minakshi Kumar

1981-01-01

21

Digital image processing  

Microsoft Academic Search

A review of the field of digital image processing is presented, with concentration upon image formation and recording processes, digital sampling and digital image display, and with in-depth coverage of image coding and image restoration. New results in image restoration are also presented, covering restoration by use of an eye-model constraint and nonlinear restoration by maximization of the posterior density

B. R. Hunt

1975-01-01

22

Computers in Public Schools: Changing the Image with Image Processing.  

ERIC Educational Resources Information Center

The kinds of educational technologies selected can make the difference between uninspired, rote computer use and challenging learning experiences. University of Arizona's Image Processing for Teaching Project has worked with over 1,000 teachers to develop image-processing techniques that provide students with exciting, open-ended opportunities for…

Raphael, Jacqueline; Greenberg, Richard

1995-01-01

23

Benchmarking: a process basis for teaching design  

Microsoft Academic Search

Benchmarking is a tool that has been employed for many years to search for `best practices' in, for example, business operations, customer relations, product design and manufacturing. To our knowledge, its application to the process of teaching design, in a university setting, is novel. As part of the Manufacturing Engineering Education Partnership (MEEP) we have restructured the way we teach

J. L. Fridley; J. E. Jorgensen; J. S. Lamancusa

1997-01-01

24

Digital image processing  

NASA Technical Reports Server (NTRS)

The Federal Systems Division of IBM has developed an image processing facility to experimentally process, view, and record digital image data. This facility has been used to support LANDSAT digital image processing investigations and advanced image processing research and development. A brief description of the facility is presented, some techniques that have been developed to correct the image data are discussed, and some results obtained by users of the facility are described.

Bernstein, R.; Ferneyhough, D. G., Jr.

1975-01-01

25

Hybrid Image Processing System.  

National Technical Information Service (NTIS)

A hybrid optical/digital image processing system has been developed for an ongoing research program in hybrid image processing. This system is described and its capabilities and limitations are discussed. Major system components include a coherent optical...

T. H. May J. A. Blodgett

1980-01-01

26

Biomedical image processing  

SciTech Connect

Biomedical image processing is a very broad field; it covers biomedical signal gathering, image forming, picture processing, and image display to medical diagnosis based on features extracted from images. This article reviews this topic in both its fundamentals and applications. In its fundamentals, some basic image processing techniques including outlining, deblurring, noise cleaning, filtering, search, classical analysis and texture analysis have been reviewed together with examples. The state-of-the-art image processing systems have been introduced and discussed in two categories: general purpose image processing systems and image analyzers. In order for these systems to be effective for biomedical applications, special biomedical image processing languages have to be developed. The combination of both hardware and software leads to clinical imaging devices. Two different types of clinical imaging devices have been discussed. There are radiological imagings which include radiography, thermography, ultrasound, nuclear medicine and CT. Among these, thermography is the most noninvasive but is limited in application due to the low energy of its source. X-ray CT is excellent for static anatomical images and is moving toward the measurement of dynamic function, whereas nuclear imaging is moving toward organ metabolism and ultrasound is toward tissue physical characteristics. Heart imaging is one of the most interesting and challenging research topics in biomedical image processing; current methods including the invasive-technique cineangiography, and noninvasive ultrasound, nuclear medicine, transmission, and emission CT methodologies have been reviewed.

Huang, H.K.

1981-01-01

27

Image Processing Software  

NASA Technical Reports Server (NTRS)

The Ames digital image velocimetry technology has been incorporated in a commercially available image processing software package that allows motion measurement of images on a PC alone. The software, manufactured by Werner Frei Associates, is IMAGELAB FFT. IMAGELAB FFT is a general purpose image processing system with a variety of other applications, among them image enhancement of fingerprints and use by banks and law enforcement agencies for analysis of videos run during robberies.

1990-01-01

28

Digital image processing  

Microsoft Academic Search

The field of digital image processing is reviewed with reference to its origins, progress, current status, and prospects for the future. Consideration is given to the evolution of image processor display devices, developments in the functional components of an image processor display system (e.g. memory, data bus, and pipeline central processing unit), and developments in the software. The major future

B. R. Hunt

1981-01-01

29

Biomedical image processing.  

PubMed

Biomedical image processing is a very broad field; it covers biomedical signal gathering, image forming, picture processing, and image display to medical diagnosis based on features extracted from images. This article reviews this topic in both its fundamentals and applications. In its fundamentals, some basic image processing techniques including outlining, deblurring, noise cleaning, filtering, search, classical analysis and texture analysis have been reviewed together with examples. The state-of-the-art image processing systems have been introduced and discussed in two categories: general purpose image processing systems and image analyzers. In order for these systems to be effective for biomedical applications, special biomedical image processing languages have to be developed. The combination of both hardware and software leads to clinical imaging devices. Two different types of clinical imaging devices have been discussed. There are radiological imagings which include radiography, thermography, ultrasound, nuclear medicine and CT. Among these, thermography is the most noninvasive but is limited in application due to the low energy of its source. X-ray CT is excellent for static anatomical images and is moving toward the measurement of dynamic function, whereas nuclear imaging is moving toward organ metabolism and ultrasound is toward tissue physical characteristics. Heart imaging is one of the most interesting and challenging research topics in biomedical image processing; current methods including the invasive-technique cineangiography, and noninvasive ultrasound, nuclear medicine, transmission, and emission CT methodologies have been reviewed. Two current federally funded research projects in heart imaging, the dynamic spatial reconstructor and the dynamic cardiac three-dimensional densitometer, should bring some fruitful results in the near future. Miscrosopic imaging technique is very different from the radiological imaging technique in the sense that interaction between the operator and the imaging device is very essential. The white blood cell analyzer has been developed to the point that it becomes a daily clinical imaging device. An interactive chromosome karyotyper is being clinical evaluated and its preliminary indication is very encouraging. Tremendous efforts have been devoted to automation of cancer cytology; it is hoped that some prototypes will be available for clinical trials very soon. Automation of histology is still in its infancy; much work still needs to be done in this area. The 1970s have been very fruitful in utilizing the imaging technique in biomedical application; the computerized tomographic scanner and the white blood cell analyzer being the most successful imaging devices... PMID:7023828

Huang, H K

1981-01-01

30

Parallel Image Processing and Image Understanding.  

National Technical Information Service (NTIS)

This research was conducted to obtain better methods for image processing. It focused on several aspects of this problem, including parallel algorithms for image processing, knowledge-based techniques for image understanding, and modeling images using sha...

A. Rosenfeld

1986-01-01

31

A Peer Review Process for Classroom Teaching  

PubMed Central

Objective Describe the planning, implementation, and faculty perceptions of a classroom peer-review process, including an evaluation tool. Design A process for peer evaluation of classroom teaching and its evaluation tool were developed and implemented by a volunteer faculty committee within our department. At the end of the year, all faculty members were asked to complete an online anonymous survey to evaluate the experience. Assessment The majority of faculty members either agreed or strongly agreed that the overall evaluation process was beneficial for both evaluators and for those being evaluated. Some areas of improvement related to the process and its evaluation tool also were identified. Summary The process of developing and implementing a peer-evaluation process for classroom teaching was found to be beneficial for faculty members, and the survey results affirmed the need and continuation of such a process.

Ragucci, Kelly R.; Lapointe, Marc

2009-01-01

32

Improved Image Processing.  

National Technical Information Service (NTIS)

A technique for image processing by one or more cycles of nutation and subtraction is described. The goal of the processing is the improvement of resolution in images degraded by linear motion blur, defocus, and diffraction. A mathematical analysis is for...

M. M. Kaplan P. Diament J. H. Troll

1975-01-01

33

Apple Image Processing Educator  

NASA Technical Reports Server (NTRS)

A software system design is proposed and demonstrated with pilot-project software. The system permits the Apple II microcomputer to be used for personalized computer-assisted instruction in the digital image processing of LANDSAT images. The programs provide data input, menu selection, graphic and hard-copy displays, and both general and detailed instructions. The pilot-project results are considered to be successful indicators of the capabilities and limits of microcomputers for digital image processing education.

Gunther, F. J.

1981-01-01

34

Image Processing Software  

NASA Technical Reports Server (NTRS)

To convert raw data into environmental products, the National Weather Service and other organizations use the Global 9000 image processing system marketed by Global Imaging, Inc. The company's GAE software package is an enhanced version of the TAE, developed by Goddard Space Flight Center to support remote sensing and image processing applications. The system can be operated in three modes and is combined with HP Apollo workstation hardware.

1992-01-01

35

Computer Aided Teaching of Digital Signal Processing.  

ERIC Educational Resources Information Center

Describes a microcomputer-based software package developed at the University of Surrey for teaching digital signal processing to undergraduate science and engineering students. Menu-driven software capabilities are explained, including demonstration of qualitative concepts and experimentation with quantitative data, and examples are given of…

Castro, Ian P.

1990-01-01

36

Teaching Psychological Report Writing: Content and Process  

ERIC Educational Resources Information Center

The purpose of this article is to discuss the process of teaching graduate students in school psychology to write psychological reports that teachers and parents find readable and that guide intervention. The consensus from studies across four decades of research is that effective psychological reports connect to the client's context; have clear…

Wiener, Judith; Costaris, Laurie

2012-01-01

37

Digital image processing-an object-oriented approach  

Microsoft Academic Search

This paper presents a class library dedicated to digital image processing which provides resources for essential digital image processing operations. Besides its practical value, the class library is used to teach both object-oriented software engineering methodology and digital image processing. The resulting module can be accessed from independent specialized applications through its public interface while its implementation details are perfectly

Dan Roman; Mark Fisher; James Cubillo

1998-01-01

38

Image Processing Learning Resources  

NSDL National Science Digital Library

The Hypermedia Image Processing Reference (HIPR) offers a wealth of resources for users of image processing and an introduction to hypermedia (through use with Web browsers). HIPR was developed at the Department of Artificial Intelligence in the University of Edinburgh as computer-based tutorial materials for use in courses on image processing and machine vision. The material is available as a package that can easily be shared on a local area network and then made available at any suitably equipped computer connected to that network. The materials cover a wide range of image processing operations and are complemented by an extensive collection of actual digitized images, all organized for easy cross-referencing. Some features include a reference section with information on some of the most common classes of image-processing operations currently used, a section describing how each operation works, and various other instructional tools, such as Java demonstrations; interactive tableau where multiple operators can demonstrate sequences of operations; suggestions for appropriate use of operations; example input and output images for each operation; suggested student exercises; an encyclopedic glossary of common image processing concepts and terms; and other reference information. From the index, visitors can search on a particular topic covered in this website.

39

[Image processing and radiotherapy].  

PubMed

Medical images are of great importance in radiotherapy, which became a privileged application field for image processing techniques. Moreover, because of the progression of the computers' performances, these techniques are also in full expansion. Today, the recent developments of the radiotherapy (3DCR, IMRT) offer a huge place to them. Effectively, they can potentially answer to the precision requirements of the modern radiotherapy, and may then contribute to improve the delivered treatments. The purpose of this article is to present the different image processing techniques that are currently used in radiotherapy (including image matching and segmentation) as they are described in the literature. PMID:15132145

Bondiau, P Y; Malandain, G; Chanalet, S; Marcy, P Y; Foa, C; Ayache, N

2004-04-01

40

Image Processing System  

NASA Technical Reports Server (NTRS)

Mallinckrodt Institute of Radiology (MIR) is using a digital image processing system which employs NASA-developed technology. MIR's computer system is the largest radiology system in the world. It is used in diagnostic imaging. Blood vessels are injected with x-ray dye, and the images which are produced indicate whether arteries are hardened or blocked. A computer program developed by Jet Propulsion Laboratory known as Mini-VICAR/IBIS was supplied to MIR by COSMIC. The program provides the basis for developing the computer imaging routines for data processing, contrast enhancement and picture display.

1986-01-01

41

Interactive models for teaching digital signal processing  

Microsoft Academic Search

Advances in signal processing theory and its multi-domain applications make it increasingly difficult for educators to teach abstract mathematical concepts as well as illustrate their relevance in real-world system design in a single course. The advent of block-based design and simulation technologies like Simulinkreg enables educators to develop and employ visual and interactive models of real-world signal processing systems to

Kirtan N. Modi; Eul-Shik Hong; Bhaskar Bhattacharya

2009-01-01

42

Clinical image processing engine  

NASA Astrophysics Data System (ADS)

Our group provides clinical image processing services to various institutes at NIH. We develop or adapt image processing programs for a variety of applications. However, each program requires a human operator to select a specific set of images and execute the program, as well as store the results appropriately for later use. To improve efficiency, we design a parallelized clinical image processing engine (CIPE) to streamline and parallelize our service. The engine takes DICOM images from a PACS server, sorts and distributes the images to different applications, multithreads the execution of applications, and collects results from the applications. The engine consists of four modules: a listener, a router, a job manager and a data manager. A template filter in XML format is defined to specify the image specification for each application. A MySQL database is created to store and manage the incoming DICOM images and application results. The engine achieves two important goals: reduce the amount of time and manpower required to process medical images, and reduce the turnaround time for responding. We tested our engine on three different applications with 12 datasets and demonstrated that the engine improved the efficiency dramatically.

Han, Wei; Yao, Jianhua; Chen, Jeremy; Summers, Ronald

2009-02-01

43

Medical image processing  

SciTech Connect

This book reviews the development and technology of nuclear medicine. Topics covered are diagnostic use of various computer technology in medicine and radiology. Various diagnostic techniques are described, particularly- CT scanning, NMR imaging and ultrasonography, and their application in various disciplines of medicine are mentioned. Emphasis is given on better quality of images, data processing and availability in time for better evaluation of patients. Two dimensional and three dimensional calculations of images for better understanding of the anatomy of lesions is also emphasized.

Suetens, P.; Young, I.T.

1985-01-01

44

Image Processing Software  

NASA Astrophysics Data System (ADS)

ABSTRACT: A brief description of astronomical image software is presented. This software was developed in a Digital Micro Vax II Computer System. : St presenta una somera descripci6n del software para procesamiento de imagenes. Este software fue desarrollado en un equipo Digital Micro Vax II. : DATA ANALYSIS - IMAGE PROCESSING

Bosio, M. A.

1990-11-01

45

A Systems Approach to the Teaching-Learning Process.  

ERIC Educational Resources Information Center

This paper introduces the concept of educational systems analysis, shows how it can be applied to the teaching-learning process, and indicates how the teaching-learning process, as a system, can be optimized by using operations research techniques. The teaching-learning process is viewed as a highly complex learning control system with the purpose…

Belgard, Maria R.

46

BAOlab: Image processing program  

NASA Astrophysics Data System (ADS)

BAOlab is an image processing package written in C that should run on nearly any UNIX system with just the standard C libraries. It reads and writes images in standard FITS format; 16- and 32-bit integer as well as 32-bit floating-point formats are supported. Multi-extension FITS files are currently not supported. Among its tools are ishape for size measurements of compact sources, mksynth for generating synthetic images consisting of a background signal including Poisson noise and a number of pointlike sources, imconvol for convolving two images (a “source” and a “kernel”) with each other using fast fourier transforms (FFTs) and storing the output as a new image, and kfit2d for fitting a two-dimensional King model to an image.

Larsen, Søren S.

2014-03-01

47

Teaching Process Design through Integrated Process Synthesis  

ERIC Educational Resources Information Center

The design course is an integral part of chemical engineering education. A novel approach to the design course was recently introduced at the University of the Witwatersrand, Johannesburg, South Africa. The course aimed to introduce students to systematic tools and techniques for setting and evaluating performance targets for processes, as well as…

Metzger, Matthew J.; Glasser, Benjamin J.; Patel, Bilal; Hildebrandt, Diane; Glasser, David

2012-01-01

48

Image processing benchmark study  

NASA Astrophysics Data System (ADS)

This paper describes the benchmarking of image processing algorithms using high-performance workstations and personal desktop computers. For the various platforms evaluated which included machines from Sun, SGI, Apple, and Gateway, compiler options were varied to obtain the fastest execution times. Algorithms evaluated included typical image processing operations such as derivatives, logical operations, morphology, subtraction, median filter, and the new SKIPSM approach. Data were collected using the different platforms and are presented here in tabular form. The results indicate that the latest generation of personal computers have processing capabilities that are similar to UNIX-based work stations.

Miller, John W. V.; Eddy, C.; Waltz, Frederick M.; Hack, Ralf; Wood, James; Stokes, D.

1998-10-01

49

Image processing apparatus and image processing method  

US Patent & Trademark Office Database

An exposure condition when obtaining a sensed image is input. Shake information when obtaining the sensed image is input. A filter to be used to correct a blur of the sensed image is generated based on the exposure condition and a weight value including a non-integer obtained from the shake information.

2013-12-10

50

Digital image processing  

Microsoft Academic Search

The principal objectives of this book are to provide an introduction to basic concepts and techniques for digital image processing and to lay a foundation that can be used as the basis for further study and research. Attention is focused on material which is fundamental and where the scope of application is not limited to specialized problems. The book is

R. S. Gonzalez; P. Wintz

1977-01-01

51

Image-Processing Program  

NASA Technical Reports Server (NTRS)

IMAGEP manipulates digital image data to effect various processing, analysis, and enhancement functions. It is keyboard-driven program organized into nine subroutines. Within subroutines are sub-subroutines also selected via keyboard. Algorithm has possible scientific, industrial, and biomedical applications in study of flows in materials, analysis of steels and ores, and pathology, respectively.

Roth, D. J.; Hull, D. R.

1994-01-01

52

Toward a Student-Centred Process of Teaching Arithmetic  

ERIC Educational Resources Information Center

This article describes a way toward a student-centred process of teaching arithmetic, where the content is harmonized with the students' conceptual levels. At school start, one classroom teacher is guided in recurrent teaching development meetings in order to develop teaching based on the students' prerequisites and to successively learn the…

Eriksson, Gota

2011-01-01

53

Fundamentals Of Biomedical Image Processing  

Microsoft Academic Search

Automatic biomedical image processing has enjoyed increased popularity of late, primarily because it can be used to enhance images to measure and count accurately and quickly in various types of applications. Preliminary background and basic terminology commonly used in biomedical image processing will be reviewed. Among these are sources and forms of biomedical images , image enhancement, searching and analysis

H. K. Huang; N. W. Washington

1978-01-01

54

Introduction to computer image processing  

NASA Technical Reports Server (NTRS)

Theoretical backgrounds and digital techniques for a class of image processing problems are presented. Image formation in the context of linear system theory, image evaluation, noise characteristics, mathematical operations on image and their implementation are discussed. Various techniques for image restoration and image enhancement are presented. Methods for object extraction and the problem of pictorial pattern recognition and classification are discussed.

Moik, J. G.

1973-01-01

55

Image processing technology  

SciTech Connect

This is the final report of a two-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The primary objective of this project was to advance image processing and visualization technologies for environmental characterization. This was effected by developing and implementing analyses of remote sensing data from satellite and airborne platforms, and demonstrating their effectiveness in visualization of environmental problems. Many sources of information were integrated as appropriate using geographic information systems.

Van Eeckhout, E.; Pope, P.; Balick, L. [and others

1996-07-01

56

scikit-image: image processing in Python.  

PubMed

scikit-image is an image processing library that implements algorithms and utilities for use in research, education and industry applications. It is released under the liberal Modified BSD open source license, provides a well-documented API in the Python programming language, and is developed by an active, international team of collaborators. In this paper we highlight the advantages of open source to achieve the goals of the scikit-image library, and we showcase several real-world image processing applications that use scikit-image. More information can be found on the project homepage, http://scikit-image.org. PMID:25024921

van der Walt, Stéfan; Schönberger, Johannes L; Nunez-Iglesias, Juan; Boulogne, François; Warner, Joshua D; Yager, Neil; Gouillart, Emmanuelle; Yu, Tony

2014-01-01

57

scikit-image: image processing in Python  

PubMed Central

scikit-image is an image processing library that implements algorithms and utilities for use in research, education and industry applications. It is released under the liberal Modified BSD open source license, provides a well-documented API in the Python programming language, and is developed by an active, international team of collaborators. In this paper we highlight the advantages of open source to achieve the goals of the scikit-image library, and we showcase several real-world image processing applications that use scikit-image. More information can be found on the project homepage, http://scikit-image.org.

Schonberger, Johannes L.; Nunez-Iglesias, Juan; Boulogne, Francois; Warner, Joshua D.; Yager, Neil; Gouillart, Emmanuelle; Yu, Tony

2014-01-01

58

Research on Optical Image Processing.  

National Technical Information Service (NTIS)

Research on computer processing of optical information included coding, enhancement and detection using monochrome and color images. A bandwidth reduction and tolerance to channel errors for monochrome images have resulted from digital image transforms. S...

H. C. Andrews L. A. Liporace L. R. Welch W. K. Pratt

1972-01-01

59

Image processing and recognition for biological images  

PubMed Central

This paper reviews image processing and pattern recognition techniques, which will be useful to analyze bioimages. Although this paper does not provide their technical details, it will be possible to grasp their main tasks and typical tools to handle the tasks. Image processing is a large research area to improve the visibility of an input image and acquire some valuable information from it. As the main tasks of image processing, this paper introduces gray-level transformation, binarization, image filtering, image segmentation, visual object tracking, optical flow and image registration. Image pattern recognition is the technique to classify an input image into one of the predefined classes and also has a large research area. This paper overviews its two main modules, that is, feature extraction module and classification module. Throughout the paper, it will be emphasized that bioimage is a very difficult target for even state-of-the-art image processing and pattern recognition techniques due to noises, deformations, etc. This paper is expected to be one tutorial guide to bridge biology and image processing researchers for their further collaboration to tackle such a difficult target.

Uchida, Seiichi

2013-01-01

60

Enhancing the Teaching-Learning Process: A Knowledge Management Approach  

ERIC Educational Resources Information Center

Purpose: The purpose of this paper is to emphasize the need for knowledge management (KM) in the teaching-learning process in technical educational institutions (TEIs) in India, and to assert the impact of information technology (IT) based KM intervention in the teaching-learning process. Design/methodology/approach: The approach of the paper is…

Bhusry, Mamta; Ranjan, Jayanthi

2012-01-01

61

Lessons learned: teaching real-time signal processing [DSP Education  

Microsoft Academic Search

This article will explore some of the key lessons learned in teaching realtime signal processing to students. These lessons are based on Texas Instruments (TI) observations over the last 25 years working intimately with universities to teach signal processing to students around the world in over 2,000 labs.

Cathy Wicks

2009-01-01

62

Smart Image Enhancement Process  

NASA Technical Reports Server (NTRS)

Contrast and lightness measures are used to first classify the image as being one of non-turbid and turbid. If turbid, the original image is enhanced to generate a first enhanced image. If non-turbid, the original image is classified in terms of a merged contrast/lightness score based on the contrast and lightness measures. The non-turbid image is enhanced to generate a second enhanced image when a poor contrast/lightness score is associated therewith. When the second enhanced image has a poor contrast/lightness score associated therewith, this image is enhanced to generate a third enhanced image. A sharpness measure is computed for one image that is selected from (i) the non-turbid image, (ii) the first enhanced image, (iii) the second enhanced image when a good contrast/lightness score is associated therewith, and (iv) the third enhanced image. If the selected image is not-sharp, it is sharpened to generate a sharpened image. The final image is selected from the selected image and the sharpened image.

Jobson, Daniel J. (Inventor); Rahman, Zia-ur (Inventor); Woodell, Glenn A. (Inventor)

2012-01-01

63

Some image tools for sonar image processing  

Microsoft Academic Search

The trend in seafloor imaging towards using multiple sonar sensors with enhanced resolution has resulted in higher volume data sets. As a consequence, users need better, more efficient tools for data processing and interpretation. This paper describes three data processing tools useful for automating and accelerating sonar image formation. All have been validated on real data and all are Triton

Stkphane Guillaudeux

2001-01-01

64

Teaching Tourism, Image and Media Relationships  

Microsoft Academic Search

Image and the media are crucially important aspects of destination management, though aspects that are often underplayed in tourism management education. This paper presents considerations and reflections on the development and implementation of a unit expounding the relationships between tourism, image and the media. The conceptual foundation of the unit was derived from the literature to encompass destination image, image

W Glen Croy

2004-01-01

65

Wherein Balloons Teach the Learning Process.  

ERIC Educational Resources Information Center

Eleanor Duckworth's teaching techniques, based on Jean Piaget's learning theories and the Elementary Science Study, are applied to teaching deaf students. The method calls for painstaking explorations that enable pupils to be confident they really know something and are not just parroting facts. (JDD)

Chira, Susan

1990-01-01

66

Processing Visual Images  

ScienceCinema

The back of the eye is lined by an extraordinary biological pixel detector, the retina. This neural network is able to extract vital information about the external visual world, and transmit this information in a timely manner to the brain. In this talk, Professor Litke will describe a system that has been implemented to study how the retina processes and encodes dynamic visual images. Based on techniques and expertise acquired in the development of silicon microstrip detectors for high energy physics experiments, this system can simultaneously record the extracellular electrical activity of hundreds of retinal output neurons. After presenting first results obtained with this system, Professor Litke will describe additional applications of this incredible technology.

67

Changes in the images of teaching, teachers, and children expressed by student teachers before and after student teaching.  

PubMed

The purpose of this study was to investigate how education majors' images of teaching, teachers, and children change before and after student teaching, with special attention to the grade level (Grades 1-2, 3-4, 5-6) taught by the student teachers at primary school in Japan. A total of 126 student teachers from an education faculty (49 men, 77 women) participated in this study using metaphor-questionnaires before and after student teaching. For images of teaching, responses to the factors Dull Event and Live Event changed, suggesting that students started to develop more positive, active, and clear images of teaching. For images of teachers, responses on the factor Performer changed, suggesting that students started to develop more active images of teachers. For images of children, responses on the factors Critic and Pure-minded Person changed, suggesting that student teachers started to develop more realistic images of children. However, grade level taught had no significant effect. PMID:20712166

Mishima, Tomotaka; Horimoto, Akihiro; Mori, Toshiaki

2010-06-01

68

FORTRAN Algorithm for Image Processing  

NASA Technical Reports Server (NTRS)

FORTRAN computer algorithm containing various image-processing analysis and enhancement functions developed. Algorithm developed specifically to process images of developmental heat-engine materials obtained with sophisticated nondestructive evaluation instruments. Applications of program include scientific, industrial, and biomedical imaging for studies of flaws in materials, analyses of steel and ores, and pathology.

Roth, Don J.; Hull, David R.

1987-01-01

69

Evaluation of a virtual teaching laboratory for signal processing education  

Microsoft Academic Search

The paper presents our experience in teaching a digital signal processing (DSP) course in an Australian postgraduate program entirely using virtual tele-lectures. A virtual teaching laboratory was designed for this purpose, allowing students to receive fully interactive, real time lectures delivered from a remote international location. We present the methodology and technology used to develop a complete set of tele-lectures

E. Ambikairajah; J. Epps; Ming Sheng; B. Celler

2003-01-01

70

The APL image processing laboratory  

NASA Technical Reports Server (NTRS)

The present and proposed capabilities of the Central Image Processing Laboratory, which provides a powerful resource for the advancement of programs in missile technology, space science, oceanography, and biomedical image analysis, are discussed. The use of image digitizing, digital image processing, and digital image output permits a variety of functional capabilities, including: enhancement, pseudocolor, convolution, computer output microfilm, presentation graphics, animations, transforms, geometric corrections, and feature extractions. The hardware and software of the Image Processing Laboratory, consisting of digitizing and processing equipment, software packages, and display equipment, is described. Attention is given to applications for imaging systems, map geometric correction, raster movie display of Seasat ocean data, Seasat and Skylab scenes of Nantucket Island, Space Shuttle imaging radar, differential radiography, and a computerized tomographic scan of the brain.

Jenkins, J. O.; Randolph, J. P.; Tilley, D. G.; Waters, C. A.

1984-01-01

71

Multiscale Image Processing of Solar Image Data  

NASA Astrophysics Data System (ADS)

It is often said that the blessing and curse of solar physics is too much data. Solar missions such as Yohkoh, SOHO and TRACE have shown us the Sun with amazing clarity but have also increased the amount of highly complex data. We have improved our view of the Sun yet we have not improved our analysis techniques. The standard techniques used for analysis of solar images generally consist of observing the evolution of features in a sequence of byte scaled images or a sequence of byte scaled difference images. The determination of features and structures in the images are done qualitatively by the observer. There is little quantitative and objective analysis done with these images. Many advances in image processing techniques have occured in the past decade. Many of these methods are possibly suited for solar image analysis. Multiscale/Multiresolution methods are perhaps the most promising. These methods have been used to formulate the human ability to view and comprehend phenomena on different scales. So these techniques could be used to quantitify the imaging processing done by the observers eyes and brains. In this work we present several applications of multiscale techniques applied to solar image data. Specifically, we discuss uses of the wavelet, curvelet, and related transforms to define a multiresolution support for EIT, LASCO and TRACE images.

Young, C.; Myers, D. C.

2001-12-01

72

Cooperative processes in image segmentation  

NASA Technical Reports Server (NTRS)

Research into the role of cooperative, or relaxation, processes in image segmentation is surveyed. Cooperative processes can be employed at several levels of the segmentation process as a preprocessing enhancement step, during supervised or unsupervised pixel classification and, finally, for the interpretation of image segments based on segment properties and relations.

Davis, L. S.

1982-01-01

73

Matlab-supported undergraduate image processing instruction  

NASA Astrophysics Data System (ADS)

More and more often, undergraduate students express the desire to take a course on image processing. These students will learn the most if the theory and algorithms covered in class can be not only illustrated through examples shown by the instructor during class but also coded, tested, and evaluated by the class participants. In the past, the major hurdle to developing a hands-on approach to image processing instruction has been the amount of programming required to implement relatively simple applications. Typical undergraduate students lack experience with low level programming languages and time is spent teaching the language itself rather than experimenting with the algorithms. High level and interpreted programming languages such as Matlab permit to address this question. Even with very little practical exposure to the language, students can rapidly develop the level of skills required to implement a range of image processing algorithms. This presentation will go over the material covered in a senior level introductory course in image processing taught at Vanderbilt University. The course itself is taught in a traditional way but it is supported by laboratories during which students are asked to implement algorithms ranging from connected component labeling to image deblurring. The students are also assigned projects that span several weeks. Examples of such assignments and projects are presented.

Dawant, Benoit M.

1998-06-01

74

Photographic image enhancement and processing  

NASA Technical Reports Server (NTRS)

Scientists using aerial imagery frequently desire image processing or enhancement of that imagery to aid them in data analysis. Sophisticated digital image processing techniques are currently employed in many applications where the data is recorded in digital format, where processing hardware and programs are available. Aerial photographic imagery poses a problem in the magnitude of the digitization processing. Photographic image processing analogous to many available digital techniques is being employed by scientific investigators. Those techniques which may be applied in a cost effective manner to processing of aerial photographic imagery are described here.

Lockwood, H. E.

1977-01-01

75

Teachers' Reports of Their Cognitive Processes during Teaching.  

ERIC Educational Resources Information Center

Using a stimulated recall technique, the reports of cognitive processes during teaching of twelve experienced junior high school teachers were recorded in an experimental setting and analyzed. Reports were related to teachers' cognitive style and ability. (Author/JKS)

Peterson, Penelope L.; Clark, Christopher M.

1978-01-01

76

Teaching about the Physics of Medical Imaging  

NASA Astrophysics Data System (ADS)

Even before the discovery of X-rays, attempts at non-invasive medical imaging required an understanding of fundamental principles of physics. Students frequently do not see these connections because they are not taught in beginning physics courses. To help students understand that physics and medical imaging are closely connected, we have developed a series of active learning units. For each unit we begin by studying how students transfer their knowledge from traditional physics classes and everyday experiences to medical applications. Then, we build instructional materials to take advantage of the students' ability to use their existing learning and knowledge resources. Each of the learning units involves a combination of hands-on activities, which present analogies, and interactive computer simulations. Our learning units introduce students to the contemporary imaging techniques of CT scans, magnetic resonance imaging (MRI), positron emission tomography (PET), and wavefront aberrometry. The project's web site is http://web.phys.ksu.edu/mmmm/.

Zollman, Dean; McBride, Dyan; Murphy, Sytil; Aryal, Bijaya; Kalita, Spartak; Wirjawan, Johannes V. D.

2010-07-01

77

Teaching Creative Problem Solving Using the Fundamentals of Manufacturing Processes  

Microsoft Academic Search

Manufacturing addresses the problem of converting raw materials into desired shapes with functional characteristics that are affected by the manufacturing processes themselves. Manufacturing problems were used to teach problem solving techniques in a Manufacturing Processes course at Gonzaga University. The students solved the problems to develop processes and the equipment to implement the processes. They analyzed and designed parts, and

Douglas L. Ramers

78

Teaching the Inquiry Process to 21st Century Learners  

ERIC Educational Resources Information Center

Unlike the static, set-in-stone research project, the inquiry process is an interactive cycle used to teach research in any content area. The inquiry process engages students in a way that promotes critical thinking, higher-level processing, and the use of more varied and appropriate resources. This article introduces the inquiry process and…

Carnesi, Sabrina; DiGiorgio, Karen

2009-01-01

79

Teaching manufacturing processes using computer animation  

Microsoft Academic Search

This paper presents eight animation tools developed at École Polytechnique de Montréal. Two sets of animations were created. The first set is intended for teaching an advanced manufacturing course. Slide shows used during this course have been enhanced with animations and simulations. Six animations were created to demonstrate chip formation, cutting forces, machine tool rigidity, chip plastic deformation, tool thermal

Marek Balazinski; Aleksander Przybylo

2005-01-01

80

Teaching as an Interpretive Inquiry Process.  

ERIC Educational Resources Information Center

An ethnographic approach to teacher action research is presented in this paper. The paper argues that an ethnographic, rather than a qualitative approach, should be considered by teachers wishing to engage in interpretive inquiry (action) research because of the focus on classroom and larger cultural contexts on the teaching-learning situation.…

Brown, Mary Jo McGee

81

The Tao of Teaching: Romance and Process.  

ERIC Educational Resources Information Center

Because college teaching aims to elevate, not entertain, it must be nourished and appreciated as a pedagogical alchemy mixing facts and feelings, ideas and skills, history and mystery. The current debate on educational reform should focus more on quality of learning experience, and on how to create and sustain it. (MSE)

Schindler, Stefan

1991-01-01

82

Nonlinear image processing for beautifying facial images  

Microsoft Academic Search

Summary form only given. A nonlinear image processing system is proposed for beautifying face images. The system is composed of a nonlinear filter bank using an e-filter, which is a nonlinear digital filter previously proposed by the author for removing small-amplitude and high-frequency noise added to a large-amplitude signal. By combining e-filters, a filter bank is obtained which separates signals

K. Arakawa

2005-01-01

83

SWNT Imaging Using Multispectral Image Processing  

NASA Astrophysics Data System (ADS)

A flexible optical system was developed to image carbon single-wall nanotube (SWNT) photoluminescence using the multispectral capabilities of a typical CCD camcorder. The built in Bayer filter of the CCD camera was utilized, using OpenCV C++ libraries for image processing, to decompose the image generated in a high magnification epifluorescence microscope setup into three pseudo-color channels. By carefully calibrating the filter beforehand, it was possible to extract spectral data from these channels, and effectively isolate the SWNT signals from the background.

Blades, Michael; Pirbhai, Massooma; Rotkin, Slava V.

2012-02-01

84

Images on the Web for Astronomy Teaching: Image Repositories  

NASA Astrophysics Data System (ADS)

This guide lists and reviews 61 Web sites with catalogs of astronomical images that are useful for both formal and informal education. Some are general sites (including images covering many topics), whereas others are particular to one topic or one instrument. We briefly discuss getting started in using images, and copyright and fair use issues.

Fraknoi, Andrew

85

TEACHING PEER REVIEW AND THE PROCESS OF SCIENTIFIC WRITING  

Microsoft Academic Search

any undergraduate and graduate students understand neither the process of scientific writing nor the significance of peer review. In response, some instructors have created writing assignments that teach or mimic parts of the scientific publishing process. However, none fully reproduced peer review and revision of papers together with the writing and publishing process from research to final, accepted draft. In

William H. Guilford

86

What Should Schools Teach? Issues of Process and Content.  

ERIC Educational Resources Information Center

When discussing what schools should teach, questions of both content and process must be addressed. Although many observers believe that a fixed content should be learned, it is impossible to separate content and process. In the process of education, experiences build on each other. This fact should cause educators to question the continuities…

Perrone, Vito

1988-01-01

87

Amateur Image Pipeline Processing using Python plus PyRAF  

NASA Astrophysics Data System (ADS)

A template pipeline spanning observing planning to publishing is offered as a basis for establishing a long term observing program. The data reduction pipeline encapsulates all policy and procedures, providing an accountable framework for data analysis and a teaching framework for IRAF. This paper introduces the technical details of a complete pipeline processing environment using Python, PyRAF and a few other languages. The pipeline encapsulates all processing decisions within an auditable framework. The framework quickly handles the heavy lifting of image processing. It also serves as an excellent teaching environment for astronomical data management and IRAF reduction decisions.

Green, Wayne

2012-05-01

88

Astronomical Image Processing with Hadoop  

NASA Astrophysics Data System (ADS)

In the coming decade astronomical surveys of the sky will generate tens of terabytes of images and detect hundreds of millions of sources every night. With a requirement that these images be analyzed in real time to identify moving sources such as potentially hazardous asteroids or transient objects such as supernovae, these data streams present many computational challenges. In the commercial world, new techniques that utilize cloud computing have been developed to handle massive data streams. In this paper we describe how cloud computing, and in particular the map-reduce paradigm, can be used in astronomical data processing. We will focus on our experience implementing a scalable image-processing pipeline for the SDSS database using Hadoop (http://hadoop.apache.org). This multi-terabyte imaging dataset approximates future surveys such as those which will be conducted with the LSST. Our pipeline performs image coaddition in which multiple partially overlapping images are registered, integrated and stitched into a single overarching image. We will first present our initial implementation, then describe several critical optimizations that have enabled us to achieve high performance, and finally describe how we are incorporating a large in-house existing image processing library into our Hadoop system. The optimizations involve prefiltering of the input to remove irrelevant images from consideration, grouping individual FITS files into larger, more efficient indexed files, and a hybrid system in which a relational database is used to determine the input images relevant to the task. The incorporation of an existing image processing library, written in C++, presented difficult challenges since Hadoop is programmed primarily in Java. We will describe how we achieved this integration and the sophisticated image processing routines that were made feasible as a result. We will end by briefly describing the longer term goals of our work, namely detection and classification of transient objects and automated object classification.

Wiley, K.; Connolly, A.; Krughoff, S.; Gardner, J.; Balazinska, M.; Howe, B.; Kwon, Y.; Bu, Y.

2011-07-01

89

SOFT-1: Imaging processing software  

NASA Technical Reports Server (NTRS)

Five levels of image processing software are enumerated and discussed: (1) logging and formatting; (2) radiometric correction; (3) correction for geometric camera distortion; (4) geometric/navigational corrections; and (5) general software tools. Specific concerns about access to and analysis of digital imaging data within the Planetary Data System are listed.

1984-01-01

90

SOFT-1: Imaging processing software  

NASA Astrophysics Data System (ADS)

Five levels of image processing software are enumerated and discussed: (1) logging and formatting; (2) radiometric correction; (3) correction for geometric camera distortion; (4) geometric/navigational corrections; and (5) general software tools. Specific concerns about access to and analysis of digital imaging data within the Planetary Data System are listed.

1984-10-01

91

Photographic image enhancement and processing  

NASA Technical Reports Server (NTRS)

Image processing techniques (computer and photographic) are described which are used within the JSC Photographic Technology Division. Two purely photographic techniques used for specific subject isolation are discussed in detail. Sample imagery is included.

Lockwood, H. E.

1975-01-01

92

A Process Education Approach To Teaching Computer Science.  

ERIC Educational Resources Information Center

The driving force of process education is its focus on students'"learning to learn." This paper describes an approach to teaching computer science which includes classroom management; the adaptation of four different courses to follow the process education approach; successes achieved; and students' responses. The courses are conducted in closed…

Smith, Peter D.

93

UCLA: Image Processing Research Group  

NSDL National Science Digital Library

The University of California at Los Angeles' Image Processing Research Group (or IMAGERS) focuses on mathematical modeling and computational techniques for image processing, with a particular emphasis on using Partial Differential Equations. The group is part of the UCLA Mathematics Department and the Institute of Pure and Applied Mathematics, but also collaborates with other departments on campus. The research areas described on their website include: Image Reconstruction, Inpainting, Computation, Segmentation & Active Contours, Level Set, Wavelets and Compression, Tomography, and Vision Modeling. They provide overviews of each research area along with links to full reports offering more in depth explanations. Recent papers by IMAGERS' researchers are posted online and available to download free of charge.

94

Fuzzy image processing in sun sensor  

NASA Technical Reports Server (NTRS)

This paper will describe how the fuzzy image processing is implemented in the instrument. Comparison of the Fuzzy image processing and a more conventional image processing algorithm is provided and shows that the Fuzzy image processing yields better accuracy then conventional image processing.

Mobasser, S.; Liebe, C. C.; Howard, A.

2003-01-01

95

Online Radiology Teaching Files and Medical Image Atlas and Database  

NSDL National Science Digital Library

Radiologists, students of radiology, and those who are interested in medical images in general will be delighted to hear about this website. Created by MedPix, the teaching files and medical images offered here can be browsed by organ system, and after selecting a particular system, visitors can learn about more about each slide in great detail. Another feature of the site allows visitors to offer their own diagnosis before learning the particulars of each discrete medical case. Visitors can also consider the "Case of the Week" area, which features a case that has been selected by the peer review board that vets all of the images that find their way into their archive. Additionally, the site also features an advanced search engine for those users who know exactly what they want.

96

Digital Image Processing: an Overview  

Microsoft Academic Search

The evolution of digital image processing can be viewed as a microcosm of the general data processing field. Originally established as a batch-type operation with only a handful of practitioners and a few applications, it has exhibited a steadily increasing growth rate, prompted by many of the same factors which have been responsible for the vast expansion in general data

1977-01-01

97

Teaching the Dance Class: Strategies to Enhance Skill Acquisition, Mastery and Positive Self-Image  

ERIC Educational Resources Information Center

Effective teaching of dance skills is informed by a variety of theoretical frameworks and individual teaching and learning styles. The purpose of this paper is to present practical teaching strategies that enhance the mastery of skills and promote self-esteem, self-efficacy, and positive self-image. The predominant thinking and primary research…

Mainwaring, Lynda M.; Krasnow, Donna H.

2010-01-01

98

Videos and images from 25 years of teaching compressible flow  

NASA Astrophysics Data System (ADS)

Compressible flow is a very visual topic due to refractive optical flow visualization and the public fascination with high-speed flight. Films, video clips, and many images are available to convey this in the classroom. An overview of this material is given and selected examples are shown, drawn from educational films, the movies, television, etc., and accumulated over 25 years of teaching basic and advanced compressible-flow courses. The impact of copyright protection and the doctrine of fair use is also discussed.

Settles, Gary

2008-11-01

99

Digital processing of radiographic images  

NASA Technical Reports Server (NTRS)

Some techniques are presented and the software documentation for the digital enhancement of radiographs. Both image handling and image processing operations are considered. The image handling operations dealt with are: (1) conversion of format of data from packed to unpacked and vice versa; (2) automatic extraction of image data arrays; (3) transposition and 90 deg rotations of large data arrays; (4) translation of data arrays for registration; and (5) reduction of the dimensions of data arrays by integral factors. Both the frequency and the spatial domain approaches are presented for the design and implementation of the image processing operation. It is shown that spatial domain recursive implementation of filters is much faster than nonrecursive implementations using fast fourier transforms (FFT) for the cases of interest in this work. The recursive implementation of a class of matched filters for enhancing image signal to noise ratio is described. Test patterns are used to illustrate the filtering operations. The application of the techniques to radiographic images of metallic structures is demonstrated through several examples.

Bond, A. D.; Ramapriyan, H. K.

1973-01-01

100

Modeling the Research Process: Alternative Approaches to Teaching Undergraduates  

NSDL National Science Digital Library

An Introduction to Research course was modified to better teach the process of scientific inquiry to students who were not engaged in research projects. Students completed several tasks involved in research projects, including making presentations in a journal club format, writing mock grant proposals, and working as teams to evaluate grant proposals.

Cooper, Janet; Felzien, Lisa

2005-05-01

101

A Plan for Teaching Data Processing to Library Science Students.  

ERIC Educational Resources Information Center

An outline is proposed for a library school course in data processing for libraries that is different from other such courses in that it emphasizes the operations of the computer itself over the study of library computer systems. The course begins with a study of computer hardware then moves to the teaching of assembly language using the MIX…

Losee, Robert M., Jr.

102

The Teaching of L2 Pronunciation through Processing Instruction  

ERIC Educational Resources Information Center

The goal of this study is to pilot test whether the instructional approach known as Processing Instruction could be adapted to the teaching of second language (L2) pronunciation. The target sounds selected were the Spanish tap and trill. Three groups of high school students of Spanish as a foreign language participated in the study. One group…

Gonzales-Bueno, Manuela; Quintana-Lara, Marcela

2011-01-01

103

Teaching About Occupations and Quality Control in Meat Processing  

ERIC Educational Resources Information Center

This article is based on Dr. McCreight's Ph.D. dissertation, "A Vocational Teaching Experiment on Occupations and Quality Control in the Processing of Meat, which was completed at The Pennsylvania State University in 1969. Glenn Z. Stevens, Professor of Agricultural Education at The Pennsylvania State University, was Dr. McCreight's major…

McCreight, Donald E.

1970-01-01

104

Teaching signal processing concepts using the SPC toolbox  

Microsoft Academic Search

We discuss an interactive software developed to complement the teaching of digital signal processing (DSP) concepts in various courses taught by the Electrical and Computer Engineering Department at the Naval Postgraduate School. While DSP is quite important to electrical engineering education, the mathematical concepts used in DSP can be rather difficult when presented in a classical classroom setting. These concepts

M. P. Fargues; D. W. Brown

1994-01-01

105

Toward a Generative Model of the Teaching-Learning Process.  

ERIC Educational Resources Information Center

Until the rise of cognitive psychology, models of the teaching-learning process (TLP) stressed external rather than internal variables. Models remained general descriptions until control theory introduced explicit system analyses. Cybernetic models emphasize feedback and adaptivity but give little attention to creativity. Research on artificial…

McMullen, David W.

106

RDI Advising Model for Improving the Teaching-Learning Process  

ERIC Educational Resources Information Center

Introduction: Advising in Educational Psychology from the perspective of RDI takes on a stronger investigative, innovative nature. The model proposed by De la Fuente et al (2006, 2007) and Education & Psychology (2007) was applied to the field of improving teaching-learning processes at a school. Hypotheses were as follows: (1) interdependence…

de la Fuente, Jesus; Lopez-Medialdea, Ana Maria

2007-01-01

107

Developing Evaluative Tool for Online Learning and Teaching Process  

ERIC Educational Resources Information Center

The research study aims to underline the development of a new scale on online learning and teaching process based on factor analysis. Further to this, the research study resulted in acceptable scale which embraces social interaction role, interaction behaviour, barriers, capacity for interaction, group interaction as sub-categories to evaluate…

Aksal, Fahriye A.

2011-01-01

108

Teaching Strategies for the Process of Planned Change.  

ERIC Educational Resources Information Center

Explores ways of presenting content and of fostering the grounding of the planned change process within the nurse's previous experience, value system, and personal characteristics. States that teaching strategies that combine experiential exercises with theory can make planned change meaningful and valuable to nurses. (NRJ)

Green, Clarissa P.

1983-01-01

109

FITS Liberator: Image processing software  

NASA Astrophysics Data System (ADS)

The ESA/ESO/NASA FITS Liberator makes it possible to process and edit astronomical science data in the FITS format to produce stunning images of the universe. Formerly a plugin for Adobe Photoshop, the current version of FITS Liberator is a stand-alone application and no longer requires Photoshop. This image processing software makes it possible to create color images using raw observations from a range of telescopes; the FITS Liberator continues to support the FITS and PDS formats, preferred by astronomers and planetary scientists respectively, which enables data to be processed from a wide range of telescopes and planetary probes, including ESO’s Very Large Telescope, the NASA/ESA Hubble Space Telescope, NASA’s Spitzer Space Telescope, ESA’s XMM-Newton Telescope and Cassini-Huygens or Mars Reconnaissance Orbiter.

Lindberg Christensen, Lars; Nielsen, Lars Holm; Nielsen, Kaspar K.; Johansen, Teis; Hurt, Robert; de Martin, David

2012-06-01

110

Yes! The Business Department Teaches Data Processing  

ERIC Educational Resources Information Center

After a brief discussion of the history and current status of business data processing versus computer science, this article focuses on the characteristics of a business data processing curriculum as compared to a computer science curriculum, including distinctions between the FORTRAN and COBOL programming languages. (SH)

Nord, Daryl; Seymour, Tom

1978-01-01

111

Image Processing: A State-of-the-Art Way to Learn Science.  

ERIC Educational Resources Information Center

Teachers participating in the Image Processing for Teaching Process, begun at the University of Arizona's Lunar and Planetary Laboratory in 1989, find this technology ideal for encouraging student discovery, promoting constructivist science or math experiences, and adapting in classrooms. Because image processing is not a computerized text, it…

Raphael, Jacqueline; Greenberg, Richard

1995-01-01

112

[Digital image processing in endodontics].  

PubMed

Digital image processing methods were applied to improve the analysis of endodontic follow-up radiographs. After the individual radiographs had been digitized with a videocamera, different standard image processing procedures, such as histogram-equilisation, histogram-matching and noise reduction were performed. In some cases the use of those techniques facilitated the comparison of radiographs taken at long intervals under nonstandardized conditions. As a result, diagnosis of the development of periapical lesions or hard tissue formation in teeth with incomplete root formation was improved. PMID:2269139

Hulsmann, M; Jager, A; Steinhofel, N

1990-07-01

113

Chemical Process Design: An Integrated Teaching Approach.  

ERIC Educational Resources Information Center

Reviews a one-semester senior plant design/laboratory course, focusing on course structure, student projects, laboratory assignments, and course evaluation. Includes discussion of laboratory exercises related to process waste water and sludge. (SK)

Debelak, Kenneth A.; Roth, John A.

1982-01-01

114

Teaching Basic Nanofabrication Processing Using Core Facilities  

NSDL National Science Digital Library

Nanofabrication is "manipulating and assembling materials atom by atom" and it is used to create materials, devices, and systems with new and unique properties. This involves the application of nanofabrication processing equipment, devices and materials. It behooves industrial technology programs to prepare students with skills necessary to supervise and manage the workforce of any organization that desire to implement nanofabrication technology. This paper addresses the educational aspects of research facilities and nano-research clusters for nanofabrication processing at Jackson State University (JSU).

Ejiwale, James

2011-03-18

115

Fingerprint recognition using image processing  

NASA Astrophysics Data System (ADS)

Finger Print Recognition is concerned with the difficult task of matching the images of finger print of a person with the finger print present in the database efficiently. Finger print Recognition is used in forensic science which helps in finding the criminals and also used in authentication of a particular person. Since, Finger print is the only thing which is unique among the people and changes from person to person. The present paper describes finger print recognition methods using various edge detection techniques and also how to detect correct finger print using a camera images. The present paper describes the method that does not require a special device but a simple camera can be used for its processes. Hence, the describe technique can also be using in a simple camera mobile phone. The various factors affecting the process will be poor illumination, noise disturbance, viewpoint-dependence, Climate factors, and Imaging conditions. The described factor has to be considered so we have to perform various image enhancement techniques so as to increase the quality and remove noise disturbance of image. The present paper describe the technique of using contour tracking on the finger print image then using edge detection on the contour and after that matching the edges inside the contour.

Dholay, Surekha; Mishra, Akassh A.

2011-04-01

116

NEW IMAGE PROCESSING TOOLBOX USING MATLAB CODES  

Microsoft Academic Search

The idea is designing and programming a new image processing toolbox using Matlab codes. This toolbox is used as an education tools to process digital images and help the students to understand how are the different image processing functions work?; such as how the image for any format and size is opened?, how are the slice images combining to get

NASSIR H. SALMAN

117

Pattern Recognition and Image Processing  

Microsoft Academic Search

Extensive research and development has taken place over the last 20 years in the areas of pattern recognition and image processing. Areas to which these disciplines have been applied include business (e. g., character recognition), medicine (diagnosis, abnormality detection), automation (robot vision), military intelligence, communications (data compression, speech recognition), and many others. This paper presents a very brief survey of

King-sun Fu; Azriel Rosenfeld

1976-01-01

118

Racoms Image Processing Module I.  

National Technical Information Service (NTIS)

Report covers the results of the Engineer Design Test for the Rapid Combat Mapping System (RACOMS) Image Processing Module I. This module is utilized to produce glass diapositives as well as Mylar and paper photographic prints from aerial photography to s...

F. P. Vena

1969-01-01

119

Concept Learning through Image Processing.  

ERIC Educational Resources Information Center

This study explored computer-based image processing as a study strategy for middle school students' science concept learning. Specifically, the research examined the effects of computer graphics generation on science concept learning and the impact of using computer graphics to show interrelationships among concepts during study time. The 87…

Cifuentes, Lauren; Yi-Chuan, Jane Hsieh

120

Word Processing: Teach It or Ignore It?  

ERIC Educational Resources Information Center

Provides background information on what is involved in word processing (WP), reviews the attitudes of business people and educators, and offers business teachers methods and suggestions for incorporating WP training into their business programs and for enlisting the help of organizations, businesses, and educational institutions. (TA)

Addams, H. Lon; Baker, William H.

1977-01-01

121

Kishou Eisei 'Himawari' Gazou No Kyouzaika (Production of Teaching Materials from Geostationary Meteorological Satellite Himawari Images).  

National Technical Information Service (NTIS)

Teaching materials to get students interested in and concerned about climatic phenomena were produced utilizing Himawari images. Transparencies of dynamic meteorological phenomena images such as low pressure (temperate and tropical), high pressure, typhoo...

I. Touma

1992-01-01

122

ImageJ: Image processing and analysis in Java  

NASA Astrophysics Data System (ADS)

ImageJ is a public domain Java image processing program inspired by NIH Image. It can display, edit, analyze, process, save and print 8-bit, 16-bit and 32-bit images. It can read many image formats including TIFF, GIF, JPEG, BMP, DICOM, FITS and "raw". It supports "stacks", a series of images that share a single window. It is multithreaded, so time-consuming operations such as image file reading can be performed in parallel with other operations.

Rasband, W. S.

2012-06-01

123

Image processing with ImageJ  

Microsoft Academic Search

Wayne Rasband of NIH has created ImageJ, an open source Java-written program that is now at version 1.31 and is used for many imaging applications, including those that that span the gamut from skin analysis to neuroscience. ImageJ is in the public domain and runs on any operating system (OS). ImageJ is easy to use and can do many imaging

M. D. Abramoff; Paulo J. Magalhães; Sunanda J. Ram

2004-01-01

124

Improving the Teaching\\/Learning Process in General Chemistry: Report on the 1997 Stony Brook General Chemistry Teaching Workshop  

Microsoft Academic Search

Motivated by the widespread recognition that traditional teaching methods at postsecondary institutions no longer are meeting students' educational needs, 59 participants came to the first Stony Brook General Chemistry Teaching Workshop, July 20-July 25, 1997, on improving the teaching\\/learning process in General Chemistry. The instructors from 42 institutions across the country, including community colleges, liberal-arts colleges, and large research universities,

David M. Hanson; Troy Wolfskill

1998-01-01

125

Design Considerations for Digital Image Processing Systems  

Microsoft Academic Search

The brightness levels in a scene or image, together with the spatial relationships among these levels, comprise the total input and output data available to the digital image processor. Indeed, in any mathematical image processing operation, these are the elements of the image which are being manipulated and which represent the major concern of the image processing professional. However, many

J. M. Booth; J. B. Schroeder

1977-01-01

126

ImageJ plug-ins for microscopic image processing  

Microsoft Academic Search

The article deals with initial research into the methods of microscopic image processing methods for the study of diverticular disease. Functional and structural changes were found in tissues of persons afflicted with diverticular disease in previous medical research. The acquired images were processed manually. The goal of research into image processing methods for automatic or semiautomatic processing followed by manual

Jan Mikulka

2011-01-01

127

Teaching the graphics processing pipeline: cosmetic and geometric attribute implications  

Microsoft Academic Search

The pipeline processing model for computer graphics typically includes stages for interpreting the display list , geometric manipulation , raster rendering image approximation>, and finally presentation image display> . At what point in the graphics processing pipeline do attributes actually become associated with picture entities? The answer depends

Jack Bresenham

2001-01-01

128

Using NASA Space Imaging to Teach Earth and Sun Topics in Professional Development Courses for In-Service Teachers  

NASA Astrophysics Data System (ADS)

several PD courses using NASA imaging technology. It includes various ways to study selected topics in physics and astronomy. We use NASA Images to develop lesson plans and EPO materials for PreK-8 grades. Topics are Space based and they vary from measurements, magnetism on Earth to that for our Sun. In addition we cover topics on ecosystem structure, biomass and water on Earth. Hands-on experiments, computer simulations, analysis of real-time NASA data, and vigorous seminar discussions are blended in an inquiry-driven curriculum to instill confident understanding of basic physical science and modern, effective methods for teaching it. Course also demonstrates ways how scientific thinking and hands-on activities could be implemented in the classroom. This course is designed to provide the non-science student a confident understanding of basic physical science and modern, effective methods for teaching it. Most of topics were selected using National Science Standards and National Mathematics Standards to be addressed in grades PreK-8. The course focuses on helping in several areas of teaching: 1) Build knowledge of scientific concepts and processes; 2) Understand the measurable attributes of objects and the units and methods of measurements; 3) Conducting data analysis (collecting, organizing, presenting scientific data, and to predict the result); 4) Use hands-on approaches to teach science; 5) Be familiar with Internet science teaching resources. Here we share our experiences and challenges we faced teaching this course.

Verner, E.; Bruhweiler, F. C.; Long, T.; Edwards, S.; Ofman, L.; Brosius, J. W.; Holman, G.; St Cyr, O. C.; Krotkov, N. A.; Fatoyinbo Agueh, T.

2012-12-01

129

Teaching Comprehension Processes Using Magazines, Paperback Novels, and Content Area Textbooks.  

ERIC Educational Resources Information Center

Argues that teaching students the process of comprehension and ways to improve their own comprehension helps to develop skills in reluctant or poor readers. Offers teaching ideas that involve a variety of reading materials. (FL)

Nist, Sherrie L.; And Others

1983-01-01

130

Multicomputer processing for medical imaging  

NASA Astrophysics Data System (ADS)

Medical imaging applications have growing processing requirements, and scalable multicomputers are needed to support these applications. Scalability -- performance speedup equal to the increased number of processors -- is necessary for a cost-effective multicomputer. We performed tests of performance and scalability on one through 16 processors on a RACE multicomputer using Parallel Application system (PAS) software. Data transfer and synchronization mechanisms introduced a minimum of overhead to the multicomputer's performance. We implemented magnetic resonance (MR) image reconstruction and multiplanar reformatting (MPR) algorithms, and demonstrated high scalability; the 16- processor configuration was 80% to 90% efficient, and the smaller configurations had higher efficiencies. Our experience is that PAS is a robust and high-productivity tool for developing scalable multicomputer applications.

Goddard, J. Iain; Greene, Jonathon; Bouzas, Brian

1995-04-01

131

Multispectral image processing for plants  

NASA Technical Reports Server (NTRS)

The development of a machine vision system to monitor plant growth and health is one of three essential steps towards establishing an intelligent system capable of accurately assessing the state of a controlled ecological life support system for long-term space travel. Besides a network of sensors, simulators are needed to predict plant features, and artificial intelligence algorithms are needed to determine the state of a plant based life support system. Multispectral machine vision and image processing can be used to sense plant features, including health and nutritional status.

Miles, Gaines E.

1991-01-01

132

Image save and carry system-based teaching-file library  

NASA Astrophysics Data System (ADS)

Digital imaging technology has introduced some new possibilities of forming teaching files without films. IS&C (Image Save & Carry) system, which is based on magneto-optic disc, is a good medium for this purpose, because of its large capacity, prompt access time, and unified format independent of operating systems. The author have constructed a teaching file library, on which user can add and edit images. CD-ROM and IS&C satisfy most of basic criteria for teaching file construction platform. CD-ROM is the best medium for circulating large numbers of identical copies, while IS&C is advantageous in personal addition and editing of library.

Morimoto, Kouji; Kimura, Michio; Fujii, Toshiyuki

1994-05-01

133

Processing of medical images using Maple  

NASA Astrophysics Data System (ADS)

Maple's Image Tools package was used to process medical images. The results showed clearer images and records of its intensities and entropy. The medical images of a rhinocerebral mucormycosis patient, who was not early diagnosed, were processed and analyzed using Maple's tools, which showed, in a clearer way, the affected parts in the perinasal cavities.

Toro Betancur, V.

2013-05-01

134

Image processing technologies in intelligent transportation systems  

NASA Astrophysics Data System (ADS)

Nowadays in intelligent transportation systems (ITS), information gathering depends heavily on visual information. Image processing technologies (IPT) play a key role. After a brief introduction of ITS, IPT is illustrated from three aspects: image sensor, image processing methods and image processing system. Among many applications for image processing in ITS, the paper presents a roadside example, licence plate recognition (LPR). Attention is centered around two aspects of LPR: plate character isolation and plate character recognition. Lastly, the paper indicates the trends of image-processing technologies in ITS.

Wang, Zhengyou; Liu, Jilin

2003-09-01

135

Image Processing for LADAR Automatic Target Recognition.  

National Technical Information Service (NTIS)

In this paper we present a novel synthesis of image processing algorithms which enable high performance in an ATR system for ladar seekers. Ladar data presents both unique capabilities and problems for image processing. We will discuss unique approaches t...

A. Van Nevel L. Peterson C. Kenney

1999-01-01

136

Image processing in neutron penumbral imaging  

NASA Astrophysics Data System (ADS)

Neutron source images of a compressed DT target burn region were obtained in 1994 on the Phebus laser facility at CEL-V, by using a penumbral imaging technique. The symmetric biconical aperture generates a signal-dependent noise which degrades the spatial resolution of the system. The recorded image must be corrected for both instrumental effects and noise. Then by deconvolving from the point spread function of the aperture, we obtain the neutron source distribution. The information structure contained in the raw image and the reconstruction techniques used are explained. Practical and theoretical problems that need to be resolved, including the amount of information in the raw data, will be discussed. Also results and comparative evaluation of those methods are presented.

Delage, Olivier; Garconnet, J. P.; Le, C. T.; Arsenault, Henri H.

1995-08-01

137

Fast and efficient iris image enhancement using logarithmic image processing  

NASA Astrophysics Data System (ADS)

Low quality iris images such as blurry, low resolution images with poor illumination create a challenge for iris recognition systems. Therefore, an efficient enhancement of iris images are needed in challenging environments. We propose a new iris recognition algorithm for enhancement of normalized iris images. Our algorithm is based on the logarithmic image processing (LIP) image enhancement which is used as one of the 3 stages in the enhancement process. Methods are tested on the MBGC database to compare enrolled video iris images from 124 subjects with 220 pixels resolutions to query video portal images from 110 subjects with 120 pixels resolution. Results from processing challenging MBGC iris data show significant improvement in the performance of iris recognition algorithms in terms of equal error rates compared to the original (unenhanced images) and the other fast image enhancement methods.

Sazonova, Nadezhda; Schuckers, Stephanie

2010-04-01

138

Computing projections of digital images in image processing pipeline architectures  

Microsoft Academic Search

This paper deals with the problem of computing projections of digital images. The novelty of our contribution is that we present algorithms which are suitable for implementation in general purpose image processing and image analysis pipeline architectures. No random access of the image memory is necessary. We propose some new pipeline configurations which achieve a remarkable degree of parallelism in

J. Sanz; E. Hinkle

1987-01-01

139

An entropic measure for the teaching-learning process  

NASA Astrophysics Data System (ADS)

Few phenomena are as complex as the teaching-learning (TL) process. The instruction efficiency and information on the state of knowledge of the student group are some key variables in this process. Guided by Shannon’s definition of information we propose an entropy based performance index ( Sp) for monitoring the teaching-learning process. Our index is based on item response curves (IRCs) which have been recently employed in physics education research. Our proposed index is an explicit function of the ability ?. A preliminary survey indicates that Sp is low (high) for high (low) ability student groups. We propose a simple model to explain this. We have also carried out a number of controlled studies to study the dependence of Sp on student ability, peer instruction and collaborative learning. Our studies indicate that Sp plays a role analogous to entropy in statistical mechanics, with student ability being akin to inverse temperature, peer instruction to an ordering (magnetic) field and collaborative learning to interacting components.

Singh, Vijay A.; Pathak, Praveen; Pandey, Pratyush

2009-10-01

140

Simulated interprofessional education: an analysis of teaching and learning processes.  

PubMed

Simulated learning activities are increasingly being used in health professions and interprofessional education (IPE). Specifically, IPE programs are frequently adopting role-play simulations as a key learning approach. Despite this widespread adoption, there is little empirical evidence exploring the teaching and learning processes embedded within this type of simulation. This exploratory study provides insight into the nature of these processes through the use of qualitative methods. A total of 152 clinicians, 101 students and 9 facilitators representing a range of health professions, participated in video-recorded role-plays and debrief sessions. Videotapes were analyzed to explore emerging issues and themes related to teaching and learning processes related to this type of interprofessional simulated learning experience. In addition, three focus groups were conducted with a subset of participants to explore perceptions of their educational experiences. Five key themes emerged from the data analysis: enthusiasm and motivation, professional role assignment, scenario realism, facilitator style and background and team facilitation. Our findings suggest that program developers need to be mindful of these five themes when using role-plays in an interprofessional context and point to the importance of deliberate and skilled facilitation in meeting desired learning outcomes. PMID:21899398

van Soeren, Mary; Devlin-Cop, Sandra; Macmillan, Kathleen; Baker, Lindsay; Egan-Lee, Eileen; Reeves, Scott

2011-11-01

141

Image enhancement based on gamma map processing  

NASA Astrophysics Data System (ADS)

This paper proposes a novel image enhancement technique based on Gamma Map Processing (GMP). In this approach, a base gamma map is directly generated according to the intensity image. After that, a sequence of gamma map processing is performed to generate a channel-wise gamma map. Mapping through the estimated gamma, image details, colorfulness, and sharpness of the original image are automatically improved. Besides, the dynamic range of the images can be virtually expanded.

Tseng, Chen-Yu; Wang, Sheng-Jyh; Chen, Yi-An

2010-04-01

142

[The diagnostic process and how to teach it].  

PubMed

The subject of the present study is the teaching of the ability of diagnosing to nursing students. It has the general objective of verifying the adequacy of the elaboration of the analysis and synthesis process and its relation to the establishment of nursing diagnosis. After the development of the programmatic content of the Medical Nursing Discipline, students individually elaborated, facing a hypothetic situation, the diagnosis process (RISNER, 1986), obtaining a total of 106 diagnosis formulations (Taxonomy I of North American Nursing Diagnosis Association). The major difficulties were in the areas of "the establishment of relations and "data clustering". Authors suggest the stimulation of the development of the process of thinking inherent to analysis and synthesis since the beginning of undergraduate course. PMID:8716339

de Carvalho, E C; Bachion, M M; Ferraz, A E; Veiga, E V; Ruffino, M C; Robazzi, M L

1996-04-01

143

Parallel processing of image contours  

NASA Astrophysics Data System (ADS)

This paper describes a parallel algorithm for ranking the pixels on a curve in O(log N) time using an EREW PRAM model. The algorithms accomplish this with N processors for a (root)N X (root)N image. After applying such an algorithm to an image, we are able to move the pixels from a curve into processors having consecutive addresses. This is important on hypercube connected machines like the Connection Machine because we can subsequently apply many algorithms to the curve using powerful segmented scan operations (i.e., parallel prefix operations). We shall illustrate this by first showing how we can find piecewise linear approximations of curves using Ramer's algorithm. This process has the effect of converting closed curves into simple polygons. As another example, we shall describe a more complicated parallel algorithm for computing the visibility graph of a simple planar polygon. The algorithm accomplishes this in O(k log N) time using O(N2/log N) processors for an N vertex polygon, where k is the link-diameter of the polygon in consideration. Both of these algorithms require only scan operations (as well as local neighbor communication) as the means of inter-processor communication. Thus, the algorithms can not only be implemented on an EREW PRAM, but also on a hypercube connected parallel machine, which is a more practical machine model. All these algorithms were implemented on the Connection Machine, and various performance tests were conducted.

Chen, Ling T.; Davis, Larry S.; Kruskal, Clyde P.

1992-04-01

144

Combining Image-Processing and Image Compression Schemes.  

National Technical Information Service (NTIS)

An investigation into the combining of image-processing schemes, specifically an image enhancement scheme, with existing compression schemes is discussed. Results are presented on the pyramid coding scheme, the subband coding scheme, and progressive trans...

H. Greenspan M. Lee

1995-01-01

145

Imaging and image processing in porous media research  

Microsoft Academic Search

Three-dimensional imaging and image processing has become an important part for investigations of fluid distribution and flow in porous media. We describe two methods of computed tomography with different characteristics, namely X-ray- and neutron-based. We give an overview of image processing sequences and their methods. We investigated image enhancement with a focus on filters using partial differential equations, classification and

A. Kaestner; E. Lehmann; M. Stampanoni

2008-01-01

146

Image processing performance analysis for low power wireless image sensors  

Microsoft Academic Search

This paper presents an analysis of an image processing performance requirements of a low power wireless image sensors network for video-surveillance. The specifications on the processing algorithms considered are: low complexity for a low power hardware-software implementation, high image compression for reducing wireless transmission power and bandwidth, acceptable image quality for video-surveillance applications under bad illumination conditions and in presence

Daniele Marcozzi; Massimo Conti

2007-01-01

147

Correcting lateral chromatic aberrations by image processing  

NASA Astrophysics Data System (ADS)

We have developed an image processing algorithm that reduces lateral chromatic aberration. It has been implemented in Nikon digital single-lens-reflex cameras and application software. We have developed the aberration detection method which analyzes capture images and detect the aberrations of the image without lens information. Moreover, we have developed the aberration correction method optimized for raw images, which are mosaic images with Bayer color filter array. We also have developed the correction method optimized for in-camera processed images, whose color shift structures are distorted by in-camera processing.

Utsugi, Akihiko; Ishiga, Kenichi

2010-07-01

148

Facial image processing for facial analysis  

Microsoft Academic Search

This paper discusses a methodology for improved image processing for human facial analysis and tries to integrate results from the visible images with the corresponding thermal images. First, an enhanced face detection algorithm in color images is described. The performance of Haar Classifiers is known as a fast real-time face detection algorithm. However, it generates false detection. The suggested solution

Moi Hoon Yap; Hassan Ugail; Reyer Zwiggelaar; Bashar Rajoub

2010-01-01

149

Singular value decompositions and digital image processing  

Microsoft Academic Search

The use of singular value decomposition (SVD) techniques in digital image processing is of considerable interest for those facilities with large computing power and stringent imaging requirements. The SVD methods are useful for image as well as quite general point spread function (impulse response) representations. The methods represent simple extensions of the theory of linear filtering. Image enhancement examples will

H. Andrews; C. L. Patterson

1976-01-01

150

Eliminating "Hotspots" in Digital Image Processing  

NASA Technical Reports Server (NTRS)

Signals from defective picture elements rejected. Image processing program for use with charge-coupled device (CCD) or other mosaic imager augmented with algorithm that compensates for common type of electronic defect. Algorithm prevents false interpretation of "hotspots". Used for robotics, image enhancement, image analysis and digital television.

Salomon, P. M.

1984-01-01

151

Contour Stencils and Variational Image Processing  

Microsoft Academic Search

The first part of this thesis is on contour stencils, a new method for edge adaptive image processing. We focus particularly on image zooming, which is the problem of increasing the resolution of a given image. An important aspect of zooming is accurate estimation of edge orientations. Contour stencils is a new method for estimating the image contours based on

Pascal Tom Getreuer

2010-01-01

152

Dynamically Reconfigurable Embedded Image Processing System  

Microsoft Academic Search

Image processing uses many data processing techniques to transform the raw data or information from a sensor system into useful information from which decisions can be made. Historically, the data processing systems associated with each image processing application were tuned or optimized to that application such as machine inspection, pattern recognition, etc. In today's environment it is desirable to quickly

Jim Nichols; Sandeep Neema

153

Combining image-processing and image compression schemes  

NASA Technical Reports Server (NTRS)

An investigation into the combining of image-processing schemes, specifically an image enhancement scheme, with existing compression schemes is discussed. Results are presented on the pyramid coding scheme, the subband coding scheme, and progressive transmission. Encouraging results are demonstrated for the combination of image enhancement and pyramid image coding schemes, especially at low bit rates. Adding the enhancement scheme to progressive image transmission allows enhanced visual perception at low resolutions. In addition, further progressing of the transmitted images, such as edge detection schemes, can gain from the added image resolution via the enhancement.

Greenspan, H.; Lee, M.-C.

1995-01-01

154

The Graphic Novel Classroom: POWerful Teaching and Learning with Images  

ERIC Educational Resources Information Center

Could you use a superhero to teach reading, writing, critical thinking, and problem solving? While seeking the answer, secondary language arts teacher Maureen Bakis discovered a powerful pedagogy that teaches those skills and more. The amazingly successful results prompted her to write this practical guide that shows middle and high school…

Bakis, Maureen

2011-01-01

155

Teaching Learning Collaborative: A Process for Supporting Professional Learning Communities  

NSDL National Science Digital Library

The teaching learning collaborative (TLC) is a unique professional development strategy that engages groups of teachers in collaborative planning and teaching of a science lesson, coaching and mentoring, and examining student work. In this chapter, the au

Topps, Jo; Cerwin, Karen; Diranna, Kathryn; Gomez-Zwiep, Susan

2009-04-02

156

Pyramid Methods in Image Processing  

Microsoft Academic Search

: The data structure used torepresent image information can be criticalto the successful completion of an imageprocessing task. One structure that hasattracted considerable attention is the imagepyramid This consists of a set of lowpass orbandpass copies of an image, eachrepresenting pattern information of adifferent scale. Here we describe a variety ofpyramid methods that we have developedfor image data compression, enhancement,analysis

E. H. Adelson; C. H. Anderson; J. R. Bergen; P. J. Burt; J. M. Ogden

1984-01-01

157

Pharmacy Students' Perceptions of a Teaching Evaluation Process  

PubMed Central

Objective To assess PharmD students' perceptions of the usefulness of Duquesne University's Teaching Effectiveness Questionnaire (TEQ), the instrument currently employed for student evaluation of teaching. Methods Opinions of PharmD students regarding the TEQ were measured using a survey instrument comprised of Likert-type scales eliciting perceptions, behaviors, and self-reported biases. Results PharmD students viewed student evaluation of teaching as appropriate and necessary, but conceded that the faculty members receiving the best evaluations were not always the most effective teachers. Most students indicated a willingness to complete the TEQ when given the opportunity but expressed frustration that their feedback did not appear to improve subsequent teaching efforts. Conclusion The current TEQ mechanism for student evaluation of teaching is clearly useful but nevertheless imperfect with respect to its ability to improve teaching. Future research may examine other aspects of pharmacy students' roles as evaluators of teaching.

Desselle, Shane P.

2007-01-01

158

Astronomical Image Processing with Hadoop  

Microsoft Academic Search

In the coming decade astronomical surveys of the sky will generate tens of terabytes of images and detect hundreds of millions of sources every night. With a requirement that these images be analyzed in real time to identify moving sources such as potentially hazardous asteroids or transient objects such as supernovae, these data streams present many computational challenges. In the

K. Wiley; A. Connolly; S. Krughoff; J. Gardner; M. Balazinska; B. Howe; Y. Kwon; Y. Bu

2011-01-01

159

Accelerated image processing on FPGAs  

Microsoft Academic Search

The Cameron project has developed a language and compiler for mapping image-based applications to field programmable gate arrays (FPGAs). This paper tests this technology on several applications and finds that FPGAs are between 8 and 800 times faster than comparable Pentiums for image based tasks.

Bruce A. Draper; J. Ross Beveridge; A. P. Willem Böhm; Charles Ross; Monica Chawathe

2003-01-01

160

Survey: Interpolation Methods in Medical Image Processing  

Microsoft Academic Search

Image interpolation techniques often are required in medical imaging for image generation (e.g., discrete back projection for inverse Radon transform) and processing such as compression or resampling. Since the ideal interpolation function spatially is unlimited, several interpolation kernels of finite size have been introduced. This paper compares 1) truncated and win- dowed sinc; 2) nearest neighbor; 3) linear; 4) quadratic;

Thomas Martin Lehmann; Claudia Gönner; Klaus Spitzer

1999-01-01

161

Combining advanced imaging processing and low cost remote imaging capabilities  

NASA Astrophysics Data System (ADS)

Target images are very important for evaluating the situation when Unattended Ground Sensors (UGS) are deployed. These images add a significant amount of information to determine the difference between hostile and non-hostile activities, the number of targets in an area, the difference between animals and people, the movement dynamics of targets, and when specific activities of interest are taking place. The imaging capabilities of UGS systems need to provide only target activity and not images without targets in the field of view. The current UGS remote imaging systems are not optimized for target processing and are not low cost. McQ describes in this paper an architectural and technologic approach for significantly improving the processing of images to provide target information while reducing the cost of the intelligent remote imaging capability.

Rohrer, Matthew J.; McQuiddy, Brian

2008-05-01

162

Learning from the National Board Portfolio Process: What Teachers Discovered about Literacy Teaching and Learning  

ERIC Educational Resources Information Center

Using a communities-of-practice framework, this qualitative study investigated what eight teachers learned about literacy teaching and learning through participation in the National Board for Professional Teaching Standards certification process. This article presents two selected teacher cases which suggest that the National Board process created…

Place, Nancy A.; Coskie, Tracy L.

2006-01-01

163

Teaching and Learning Information Technology Process: From a 25 Year Perspective--Math Regents  

ERIC Educational Resources Information Center

This paper will describe the Teaching and Learning Informational Technology Process (TLITP). Before present day strategies, teaching and learning relied on transformations based on quantification to measure performance. The process will be a non-linear three construct of teacher, student and community. Emphasizing old practices now is the…

Lewis Sanchez, Louise

2007-01-01

164

Effects of Using Online Tools in Improving Regulation of the Teaching-Learning Process  

ERIC Educational Resources Information Center

Introduction: The current panorama of Higher Education reveals a need to improve teaching and learning processes taking place there. The rise of the information society transforms how we organize learning and transmit knowledge. On this account, teaching-learning processes must be enhanced, the role of teachers and students must be evaluated, and…

de la Fuente, Jesus; Cano, Francisco; Justicia, Fernando; Pichardo, Maria del Carmen; Garcia-Berben, Ana Belen; Martinez-Vicente, Jose Manuel; Sander, Paul

2007-01-01

165

Matching rendered and real world images by digital image processing  

NASA Astrophysics Data System (ADS)

Recent advances in computer-generated images (CGI) have been used in commercial and industrial photography providing a broad scope in product advertising. Mixing real world images with those rendered from virtual space software shows a more or less visible mismatching between corresponding image quality performance. Rendered images are produced by software which quality performance is only limited by the resolution output. Real world images are taken with cameras with some amount of image degradation factors as lens residual aberrations, diffraction, sensor low pass anti aliasing filters, color pattern demosaicing, etc. The effect of all those image quality degradation factors can be characterized by the system Point Spread Function (PSF). Because the image is the convolution of the object by the system PSF, its characterization shows the amount of image degradation added to any taken picture. This work explores the use of image processing to degrade the rendered images following the parameters indicated by the real system PSF, attempting to match both virtual and real world image qualities. The system MTF is determined by the slanted edge method both in laboratory conditions and in the real picture environment in order to compare the influence of the working conditions on the device performance; an approximation to the system PSF is derived from the two measurements. The rendered images are filtered through a Gaussian filter obtained from the taking system PSF. Results with and without filtering are shown and compared measuring the contrast achieved in different final image regions.

Mitjà, Carles; Bover, Toni; Bigas, Miquel; Escofet, Jaume

2010-04-01

166

Image Processing in Medical Microscopy  

PubMed Central

Full automation in medical microscopy has been accomplished in the field of clinical determination of the white blood cell differential count. Manufacture of differential counting microscopes commenced in 1974, and approximately 1,000 of these robots are now in the field. They analyze images of human white blood cells, red blood cells, and platelets at the global rate of approximately 100,000 slides per day. This incredible throughout represents automated image analysis and pattern recognition at the rate of 5 billion images per year and represents a major accomplishments in the application of machine vision in medicine. In other areas, such as cytology and cytogenetics, automated computer vision is still in the research phase. This paper discusses the state of the art in blood smear analysis automation and in other related areas including multi-resolution microscopy where images are currently being generated over a 64:1 magnification containing from one-quarter megapixel to one gigapixel in full color.

Preston, Kendall

1986-01-01

167

Recent developments in digital image processing at the image processing laboratory at the jet propulsion laboratory  

Microsoft Academic Search

Image processing of spacecraft images has been carried on at the Jet Propulsion Laboratory since 1964. The most recent advances in removal of geometric distortion and residual image effects along with various types of mapping projections are covered. The recent applications of image processing to the areas of bio-medicine, forensic sciences, and astronomy are discussed. These treatments are of a

DOUGLAS A. O'HANDLEY; WILLIAM B. GREEN

1972-01-01

168

Programmable Iterative Optical Image And Data Processing  

NASA Technical Reports Server (NTRS)

Proposed method of iterative optical image and data processing overcomes limitations imposed by loss of optical power after repeated passes through many optical elements - especially, beam splitters. Involves selective, timed combination of optical wavefront phase conjugation and amplification to regenerate images in real time to compensate for losses in optical iteration loops; timing such that amplification turned on to regenerate desired image, then turned off so as not to regenerate other, undesired images or spurious light propagating through loops from unwanted reflections.

Jackson, Deborah J.

1995-01-01

169

Quantitative image processing in fluid mechanics  

NASA Technical Reports Server (NTRS)

The current status of digital image processing in fluid flow research is reviewed. In particular, attention is given to a comprehensive approach to the extraction of quantitative data from multivariate databases and examples of recent developments. The discussion covers numerical simulations and experiments, data processing, generation and dissemination of knowledge, traditional image processing, hybrid processing, fluid flow vector field topology, and isosurface analysis using Marching Cubes.

Hesselink, Lambertus; Helman, James; Ning, Paul

1992-01-01

170

Non-linear Post Processing Image Enhancement  

NASA Technical Reports Server (NTRS)

A non-linear filter for image post processing based on the feedforward Neural Network topology is presented. This study was undertaken to investigate the usefulness of "smart" filters in image post processing. The filter has shown to be useful in recovering high frequencies, such as those lost during the JPEG compression-decompression process. The filtered images have a higher signal to noise ratio, and a higher perceived image quality. Simulation studies comparing the proposed filter with the optimum mean square non-linear filter, showing examples of the high frequency recovery, and the statistical properties of the filter are given,

Hunt, Shawn; Lopez, Alex; Torres, Angel

1997-01-01

171

Probabilistic image processing and Bayesian network  

Microsoft Academic Search

The basic frameworks and practical schemes of the Bayesian network and the belief propagation to the probabilistic image processing are reviewed. The probabilistic image processing is formulated by means of Bayesian statistics and Markov random fields. The system is regarded as one of Bayesian networks. In general, the Bayesian network has serious computational complexity because the proba- bilistic models include

Kazuyuki Tanaka

2005-01-01

172

Digital image processing techniques for cephalometric analysis.  

PubMed

This paper describes the application of digital image processing methods for better landmark identification in cephalometric analysis. Conventionally taken radiographs are captured by a video camera and processed by the IPS system (KONTRON). After a detailed analysis of the transfer characteristics of the image acquisition system, the algorithms for enhancing digitized cephalograms are described. The improvement of image quality is demonstrated by several examples. The limitations of video acquisition systems are discussed and possibilities for further development are indicated. PMID:2044358

Döler, W; Steinhöfel, N; Jäger, A

1991-01-01

173

Web interface for image processing algorithms  

NASA Astrophysics Data System (ADS)

In this contribution we present an interface for image processing algorithms that has been made recently available on the Internet (http://nibbler.uni-koblenz.de). First, we show its usefulness compared to some other existing products. After a description of its architecture, its main features are then presented: the particularity of the user management, its image database, its interface, and its original quarantine system. We finally present the result of an evaluation performed by students in image processing.

Chastel, Serge; Schwab, Guido; Paulus, Dietrich

2003-12-01

174

Biomedical image analysis and processing in clouds  

NASA Astrophysics Data System (ADS)

Cloud-based Image Analysis and Processing Toolbox project runs on the Australian National eResearch Collaboration Tools and Resources (NeCTAR) cloud infrastructure and allows access to biomedical image processing and analysis services to researchers via remotely accessible user interfaces. By providing user-friendly access to cloud computing resources and new workflow-based interfaces, our solution enables researchers to carry out various challenging image analysis and reconstruction tasks. Several case studies will be presented during the conference.

Bednarz, Tomasz; Szul, Piotr; Arzhaeva, Yulia; Wang, Dadong; Burdett, Neil; Khassapov, Alex; Chen, Shiping; Vallotton, Pascal; Lagerstrom, Ryan; Gureyev, Tim; Taylor, John

2013-10-01

175

SUPRIM: easily modified image processing software.  

PubMed

A flexible, modular software package intended for the processing of electron microscopy images is presented. The system consists of a set of image processing tools or filters, written in the C programming language, and a command line style user interface based on the UNIX shell. The pipe and filter structure of UNIX and the availability of command files in the form of shell scripts eases the construction of complex image processing procedures from the simpler tools. Implementation of a new image processing algorithm in SUPRIM may often be performed by construction of a new shell script, using already existing tools. Currently, the package has been used for two- and three-dimensional image processing and reconstruction of macromolecules and other structures of biological interest. PMID:8742734

Schroeter, J P; Bretaudiere, J P

1996-01-01

176

A study of teaching and learning processes in integrated science classrooms  

Microsoft Academic Search

Twelve biology graduates and 12 physics graduates were observed, each teaching three biology and three physics topics as part of a co?ordinated, integrated science curriculum. For each teacher?class and for each discipline taught, behavioural profiles were recorded and then classified according to a typology of approaches to science teaching.A contingency table analysis confirmed substantial changes in teaching and learning processes

R. G. Hacker; M. J. Rowe

1985-01-01

177

From image to data using common image-processing techniques.  

PubMed

A digital microscopy image is an array of number values, which with adequate contrast can be interpreted as spatial information. Through processing and analysis by mathematical means, using computer-assisted imaging software programs, raw image data contrast can be enhanced to improve the extraction of image features for measurement and analysis. This mathematical feature extraction (referred to as segmentation) provides the basis for general image processing. The methods discussed in this unit address common image analysis challenges such as object counting with touching objects, objects within other objects, and object identification in a field with uneven illumination or uneven brightness, along with step-by-step procedures for achieving these results. PMID:20938916

Sysko, Laura R; Davis, Michael A

2010-10-01

178

Image processing: mathematics, engineering, or art  

SciTech Connect

From the strict mathematical viewpoint, it is impossible to fully achieve the goal of digital image processing, which is to determine an unknown function of two dimensions from a finite number of discrete measurements linearly related to it. However, the necessity to display image data in a form that is visually useful to an observer supersedes such mathematically correct admonitions. Engineering defines the technological limits of what kind of image processing can be done and how the resulting image can be displayed. The appeal and usefulness of the final image to the human eye pertains to aesthetics. Effective image processing necessitates unification of mathematical theory, practical implementation, and artistic display. 59 references, 6 figures.

Hanson, K.M.

1985-01-01

179

Real Time Holographic Image Processing.  

National Technical Information Service (NTIS)

We have proposed homodyne and heterodyne techniques for imaging in a scattering medium. The first technique is based on the principle of the Doppler shift difference of the light which is scattered from an object vs light scattered by the surroundings. We...

J. Khoury M. Cronin-Golomb

1996-01-01

180

Mobile Phone Images and Video in Science Teaching and Learning  

ERIC Educational Resources Information Center

This article reports a study into how mobile phones could be used to enhance teaching and learning in secondary school science. It describes four lessons devised by groups of Sri Lankan teachers all of which centred on the use of the mobile phone cameras rather than their communication functions. A qualitative methodological approach was used to…

Ekanayake, Sakunthala Yatigammana; Wishart, Jocelyn

2014-01-01

181

Snapping Sharks, Maddening Mindreaders, and Interactive Images: Teaching Correlation.  

ERIC Educational Resources Information Center

Understanding correlation coefficients is difficult for students. A free computer program that helps introductory psychology students distinguish between positive and negative correlation, and which also teaches them to understand the differences between correlation coefficients of different size is described in this paper. The program is…

Mitchell, Mark L.

182

Applications of Digital Image Processing 11  

NASA Technical Reports Server (NTRS)

A new technique, digital image velocimetry, is proposed for the measurement of instantaneous velocity fields of time dependent flows. A time sequence of single-exposure images of seed particles are captured with a high-speed camera, and a finite number of the single-exposure images are sampled within a prescribed period in time. The sampled images are then digitized on an image processor, enhanced, and superimposed to construct an image which is equivalent to a multiple exposure image used in both laser speckle velocimetry and particle image velocimetry. The superimposed image and a single-exposure Image are digitally Fourier transformed for extraction of information on the velocity field. A great enhancement of the dynamic range of the velocity measurement is accomplished through the new technique by manipulating the Fourier transform of both the single-exposure image and the superimposed image. Also the direction of the velocity vector is unequivocally determined. With the use of a high-speed video camera, the whole process from image acquisition to velocity determination can be carried out electronically; thus this technique can be developed into a real-time capability.

Cho, Y. -C.

1988-01-01

183

Process perspective on image quality evaluation  

NASA Astrophysics Data System (ADS)

The psychological complexity of multivariate image quality evaluation makes it difficult to develop general image quality metrics. Quality evaluation includes several mental processes and ignoring these processes and the use of a few test images can lead to biased results. By using a qualitative/quantitative (Interpretation Based Quality, IBQ) methodology, we examined the process of pair-wise comparison in a setting, where the quality of the images printed by laser printer on different paper grades was evaluated. Test image consisted of a picture of a table covered with several objects. Three other images were also used, photographs of a woman, cityscape and countryside. In addition to the pair-wise comparisons, observers (N=10) were interviewed about the subjective quality attributes they used in making their quality decisions. An examination of the individual pair-wise comparisons revealed serious inconsistencies in observers' evaluations on the test image content, but not on other contexts. The qualitative analysis showed that this inconsistency was due to the observers' focus of attention. The lack of easily recognizable context in the test image may have contributed to this inconsistency. To obtain reliable knowledge of the effect of image context or attention on subjective image quality, a qualitative methodology is needed.

Leisti, Tuomas; Halonen, Raisa; Kokkonen, Anna; Weckman, Hanna; Mettänen, Marja; Lensu, Lasse; Ritala, Risto; Oittinen, Pirkko; Nyman, Göte

2008-01-01

184

Biometric Encryption using image processing  

Microsoft Academic Search

Biometric EncryptionTM is an algorithm which has been developed to securely link and retrieve a digital key using the interaction of a biometric image, such as a fingerprint, with a secure block of data, known as a BioscryptTM. The key can be used, for example, as an encryption\\/decryption key. The BioscryptTM comprises a filter function, which is calculated using an

Colin Soutar; Danny Roberge; Alex Stoianov; Rene Gilroy; B. V. K. Vijaya Kumar

1998-01-01

185

Correlating Sheet Plastinated Slices, Computed Tomography Images and Magnetic Resonance Images of the Pelvic Girdle: A Teaching Tool  

Microsoft Academic Search

Sheet plastination is currently used to produce anatomical slices of different body structures, allowing one to study and teach their topography in an anatomically correct state. Correlation with computed tomography (CT) and magnetic resonance imaging (MRI) techniques gives more insight into their anatomy. Using two female cadaver pelvises CT and MRI were performed. One pelvis was used to prepare 2-mm-thick

C. A. C. Entius; R. R. van Rijn; J. C. Holstege; R. Stoeckart; A. W. Zwamborn

1997-01-01

186

Classification of melanoma and Clark nevus skin lesions based on medical image processing techniques  

Microsoft Academic Search

According to the statistics, melanoma accounts for just 11 % of all types of skin cancer, it is responsible for most of the deaths. Melanoma is visually difficult for clinicians to differentiate from Clark nevus lesions which are benign. The application of image processing techniques to these lesions may be useful as an educational tool for teaching physicians to differentiate

Dawei Nie

2011-01-01

187

Interactive image processing as learning by doing component of a WBT application.  

PubMed

Web Based Training (WBT) is of increasing importance [1][2]. In [5] the main author has presented and discussed an overall approach to WBT for medical image processing. In the present contribution the interactive part of the approach is discussed in detail and its prototypical realisation in the framework of a client server teaching application is presented. PMID:15460651

Horsch, Alexander; Nätscher, Catharina; Tobman, Matvei; Balbach, Thomas; Danninger, Maria; Schulz, Steffi; Stapf, Daniel

2002-01-01

188

Improving the Teaching/Learning Process in General Chemistry: Report on the 1997 Stony Brook General Chemistry Teaching Workshop  

NASA Astrophysics Data System (ADS)

Motivated by the widespread recognition that traditional teaching methods at postsecondary institutions no longer are meeting students' educational needs, 59 participants came to the first Stony Brook General Chemistry Teaching Workshop, July 20-July 25, 1997, on improving the teaching/learning process in General Chemistry. The instructors from 42 institutions across the country, including community colleges, liberal-arts colleges, and large research universities, had mutual concerns that students are having difficulty understanding and applying concepts, finding relevance, transferring knowledge within and across disciplines, and identifying and developing skills needed for success in college and a career. This situation has come about because challenges posed by students' increasing diversity in academic preparation, cultural background, motivation, and career goals go unmet, with too many courses maintaining the conventional objective of structuring and presenting information.

Hanson, David M.; Wolfskill, Troy

1998-02-01

189

Using Process and Inqury to Teach Content: Projectile Motion and Graphing  

ERIC Educational Resources Information Center

These series of lessons uses the process of student inquiry to teach the concepts of force and motion identified in the National Science Education Standards for grades 5-8. The lesson plan also uses technology as a teaching tool through the use of interactive Web sites. The lessons are built on the 5-E format and feature imbedded assessments.

Rhea, Marilyn; Lucido, Patricia; Gregerson-Malm, Cheryl

2005-01-01

190

Prospective Teachers' Skills in Planning and Applying Learning-Teaching Process  

ERIC Educational Resources Information Center

With the reconstruction of the curricula in Turkey, important changes have existed in the activities of education and teaching. That is why it has become an important case of research to determine how much student teachers know about the process of learning-teaching. This study aims to show how are student teachers capable are of planning and…

Selahattin, Arslan; Ilknur, Ozpinar

2010-01-01

191

Using Process and Inquiry to Teach Content: Projectile Motion and Graphing  

Microsoft Academic Search

These series of lessons uses the process of student inquiry to teach the concepts of force and motion identified in the National Science Education Standards for grades 5-8. The lesson plan also uses technology as a teaching tool through the use of interactive Web sites. The lessons are built on the 5-E format and feature imbedded assessments.

Marilyn Rhea; Patricia Lucido; Cheryl Gregerson-Malm

2005-01-01

192

The Effect of Activity Based Lexis Teaching on Vocabulary Development Process  

ERIC Educational Resources Information Center

"Teaching word" as a complimentary process of teaching Turkish is a crucial field of study. However, studies on this area are insufficient. The only aim of the designed activities that get under way with the constructivist approach on which new education programs are based is to provide students with vocabulary elements of Turkish. In…

Mert, Esra Lule

2013-01-01

193

Process Evaluation of a Teaching and Learning Centre at a Research University  

ERIC Educational Resources Information Center

This paper describes the evaluation of a teaching and learning centre (TLC) five?years after its inception at a mid-sized, midwestern state university. The mixed methods process evaluation gathered data from 209 attendees and non-attendees of the TLC from the full-time, benefit-eligible teaching faculty. Focus groups noted feelings of…

Smith, Deborah B.; Gadbury-Amyot, Cynthia C.

2014-01-01

194

Technology Integration into the Teaching-Learning Process by Business Education Teachers  

ERIC Educational Resources Information Center

This study addressed the factors that explain the integration of technology into the teaching-learning process in Louisiana's secondary business education programs. Four variables explain some of the variance in teachers' integration of technology in instruction. These variables are perceived teaching effectiveness, perceived barriers to…

Redmann, Donna H.; Kotrlik, Joe W.

2004-01-01

195

Image processing technology for enhanced situational awareness  

NASA Astrophysics Data System (ADS)

This paper discusses the integration of a number of advanced image and data processing technologies in support of the development of next-generation Situational Awareness systems for counter-terrorism and crime fighting applications. In particular, the paper discusses the European Union Framework 7 'SAMURAI' project, which is investigating novel approaches to interactive Situational Awareness using cooperative networks of heterogeneous imaging sensors. Specific focus is given to novel Data Fusion aspects of the research which aim to improve system performance through intelligently fusing both image data and non image data sources, resolving human-machine conflicts, and refining the Situational Awareness picture. In addition, the paper highlights some recent advances in supporting image processing technologies. Finally, future trends in image-based Situational Awareness are identified, such as Post-Event Analysis (also known as 'Back-Tracking'), and the associated technical challenges are discussed.

Page, S. F.; Smith, M. I.; Hickman, D.

2009-09-01

196

Efficient Image Enhancement Algorithm Using Multi-Rate Image Processing  

Microsoft Academic Search

This paper describes an efficient image enhancement method based on the Multi-Scale Retinex (MSR) approach for pre-processing of video applications. The processing amount is drastically reduced to 4 orders less than that of the original MSR, and 1 order less than the latest fast MSR method. For the efficient processing, our proposed method employs multi-stage and multi-rate filter processing which

Takeshi Okuno; Takao Nishitani

2010-01-01

197

Earth Observation Services (Image Processing Software)  

NASA Technical Reports Server (NTRS)

San Diego State University and Environmental Systems Research Institute, with other agencies, have applied satellite imaging and image processing techniques to geographic information systems (GIS) updating. The resulting images display land use and are used by a regional planning agency for applications like mapping vegetation distribution and preserving wildlife habitats. The EOCAP program provides government co-funding to encourage private investment in, and to broaden the use of NASA-developed technology for analyzing information about Earth and ocean resources.

1992-01-01

198

Nonlinear Optical Image Processing with Bacteriorhodopsin Films  

NASA Technical Reports Server (NTRS)

The transmission properties of some bacteriorhodopsin film spatial light modulators are uniquely suited to allow nonlinear optical image processing operations to be applied to images with multiplicative noise characteristics. A logarithmic amplitude transmission feature of the film permits the conversion of multiplicative noise to additive noise, which may then be linearly filtered out in the Fourier plane of the transformed image. The bacteriorhodopsin film displays the logarithmic amplitude response for write beam intensities spanning a dynamic range greater than 2.0 orders of magnitude. We present experimental results demonstrating the principle and capability for several different image and noise situations, including deterministic noise and speckle. Using the bacteriorhodopsin film, we successfully filter out image noise from the transformed image that cannot be removed from the original image.

Downie, John D.; Deiss, Ron (Technical Monitor)

1994-01-01

199

Color image processing using symbolic data analysis  

Microsoft Academic Search

In this paper we use symbolic data analysis in the color image processing. First, we define symbolic objects and we describe also a method of clustering, in order to find the optimal number of homogeneous parts in the image. After, we describe the similarity and dissimilarity measures for symbolic objects. We define a new similarity measure between symbolic objects with

Giannoula Florou

1996-01-01

200

Image processing in the neurologic sciences  

Microsoft Academic Search

Imaging modalities like MRI and PET play an important role in neurologic diagnostics. More than just displaying the examination data as an image, a computer-aided processing can reveal quantitative descriptions of tissue lesions and properties, the nature of the participating structures and their changes in time. On a quantitative basis, more profound statements about structure function relationships and therapeutic implications

F. Kruggel; A. Horsch; G. Mittelhausser; M. Schnabel

1994-01-01

201

Order statistics in digital image processing  

Microsoft Academic Search

A family of nonlinear filters based on order statistics is presented. A mathematical tool derived through robust estimation theory, order statistics has allowed engineers to develop nonlinear filters with excellent robustness properties. These filters are well suited to digital image processing because they preserve the edges and the fine details of an image much better than conventional linear filters. The

IOANNIS PITAS; ANASTASIOS N. VENETSANOPOULOS

1992-01-01

202

Digital Image Processing in Private Industry.  

ERIC Educational Resources Information Center

Examines various types of private industry optical disk installations in terms of business requirements for digital image systems in five areas: records management; transaction processing; engineering/manufacturing; information distribution; and office automation. Approaches for implementing image systems are addressed as well as key success…

Moore, Connie

1986-01-01

203

Face identification using thermal image processing  

Microsoft Academic Search

A method for face identification has been developed by exploiting thermal image processing techniques. The method is based on 2-dimensional detection of the temperature distribution of the face, using infrared rays. The front-view face in the input image is normalized in terms of location and size, followed by measurement of the temperature distribution, the locally averaged temperature and the shape

Y. Yoshitomi; T. Miyaura; S. Tomita; S. Kimura

1997-01-01

204

Recent developments in digital image processing at the Image Processing Laboratory of JPL.  

NASA Technical Reports Server (NTRS)

Review of some of the computer-aided digital image processing techniques recently developed. Special attention is given to mapping and mosaicking techniques and to preliminary developments in range determination from stereo image pairs. The discussed image processing utilization areas include space, biomedical, and robotic applications.

O'Handley, D. A.

1973-01-01

205

Wavelet Transforms in Parallel Image Processing.  

National Technical Information Service (NTIS)

This project consists of two parts: applications of wavelet transforms in multiscale image processing, and parallel algorithms and architectures. We have studied issues in wavelet-based edge detection: antisymmetry of wavelet filters and their support siz...

C. C. Li R. W. Hall

1994-01-01

206

Eos Image Data Processing System Definition Study.  

National Technical Information Service (NTIS)

The Image Processing System (IPS) requirements and configuration are defined for NASA-sponsored advanced technology Earth Observatory System (EOS). The scope included investigation and definition of IPS operational, functional, and product requirements co...

J. Gilbert T. Honikman E. Mcmahon E. Miller L. Pietrzak

1973-01-01

207

Processamento Digital de Imagens (Digital Image Processing).  

National Technical Information Service (NTIS)

The emergency of a body of knowledge is presented, which is structured on solid mathematical concepts and compatible with the physical restrictions: the subject, image processing. It shows a revision, under conceptual mathematical optics, of the main tech...

J. Barrera

1987-01-01

208

Checking Fits With Digital Image Processing  

NASA Technical Reports Server (NTRS)

Computer-aided video inspection of mechanical and electrical connectors feasible. Report discusses work done on digital image processing for computer-aided interface verification (CAIV). Two kinds of components examined: mechanical mating flange and electrical plug.

Davis, R. M.; Geaslen, W. D.

1988-01-01

209

Web-based distributed image processing system  

NASA Astrophysics Data System (ADS)

This paper presents a framework for developing a Web-based distributed image processing application system that is flexible, convenient, and scalable. The system uses the existing Web-based technology and image processing methodologies to implement this capability in a distributed computing environment that may include powerful machines to process complex and large images. The system consists of browser, server, service registry and task scheduler, image data storage and management, and knowledge-based image processing services. A server-side application considers the user"s request from a client side. The server host identifies the request and the necessary resources and schedules the computing resources and image processing services. Based on the instructions of the developer"s side (the service provider) a proper knowledge-based on-line assistance is given to the client to select the right algorithm, set up proper parameter values in order to maximize the usage. Developers can modify and upgrade the services at their own site and publish the workable version, its interface, and required resources to the server. The server enables remote invocation of the algorithm by providing a seamless and efficient linkage mechanism. An application for segmentation operation using deformable contour methods for complex images is provided as an example.

Han, Chia Y.; Chen, Hong; He, Lei; Wee, William G.

2003-01-01

210

Using MMX Technology in Digital Image Processing  

Microsoft Academic Search

INTRODUCTION1.1 OverviewMMX technology is designed to accelerate multimedia and communications applications. The technologyincludes new processor instructions and data types and exploits the parallelism in processing multiple data.In this work we demonstrate how to use MMX technology in digital image processing applications anddiscuss important aspects of practical implementation with the GCC compiler. We also focus on theexperimental results of common image

Vladimir Kravtchenko

1998-01-01

211

Color image processing for date quality evaluation  

NASA Astrophysics Data System (ADS)

Many agricultural non-contact visual inspection applications use color image processing techniques because color is often a good indicator of product quality. Color evaluation is an essential step in the processing and inventory control of fruits and vegetables that directly affects profitability. Most color spaces such as RGB and HSV represent colors with three-dimensional data, which makes using color image processing a challenging task. Since most agricultural applications only require analysis on a predefined set or range of colors, mapping these relevant colors to a small number of indexes allows simple and efficient color image processing for quality evaluation. This paper presents a simple but efficient color mapping and image processing technique that is designed specifically for real-time quality evaluation of Medjool dates. In contrast with more complex color image processing techniques, the proposed color mapping method makes it easy for a human operator to specify and adjust color-preference settings for different color groups representing distinct quality levels. Using this color mapping technique, the color image is first converted to a color map that has one color index represents a color value for each pixel. Fruit maturity level is evaluated based on these color indices. A skin lamination threshold is then determined based on the fruit surface characteristics. This adaptive threshold is used to detect delaminated fruit skin and hence determine the fruit quality. The performance of this robust color grading technique has been used for real-time Medjool date grading.

Lee, Dah Jye; Archibald, James K.

2010-01-01

212

A client server model to facilitate creation of a medical image teaching library.  

PubMed

A simple and convenient system for indexing and archiving medical images used in teaching was developed. The approach was to combine a smart client-side graphical user interface that controlled image size, file format, and keyword structure, and communicated with the hospital information system via hypertext mark-up language, to populate the interface with user selectable pull-down menus. The result is a system that is easily extensible beyond the radiology images for which it was originally designed. Only minor modifications of the client interface are required to adapt the program to accept any file format or image type. PMID:10461575

Hornof, W J; Ballance, D W; Brenston, P R; Self, J A

1999-08-01

213

Preservice Chemistry Teachers' Images about Science Teaching in Their Future Classrooms  

ERIC Educational Resources Information Center

The purpose of this study is to explore pre-service chemistry teachers' images of science teaching in their future classrooms. Also, association between instructional style, gender, and desire to be a teacher was explored. Sixty six pre-service chemistry teachers from three public universities participated in the data collection for this study. A…

Elmas, Ridvan; Demirdogen, Betul; Geban, Omer

2011-01-01

214

Early Childhood Education Pre-Service Teachers' Images of Teacher and Beliefs about Teaching  

Microsoft Academic Search

The purpose of this qualitative case study was to explore early childhood education pre-service teachers' images of an early childhood education teacher and their beliefs about teaching. 14 pre-service teachers at a Northeastern State University in the United States of America agreed to participate in the study. A survey questionnaire, participants' journal entries, and artifacts created by the participants were

Jale ALDEMIR; Ozcan SEZER

2009-01-01

215

Against a Negative Image of Science: History of Science and the Teaching of Physics and Chemistry  

Microsoft Academic Search

After a first approach to analyze which is today's status of the history ofscience in high school Physics and Chemistry classes, we attempt to demonstrate that an appropriateintroduction of several aspects of History and Sociology of Science in our classes can operate asignificant improvement in pupils' image and attitudes in science and science teaching. We will show thatseveral groups of

J. Solbes; M. Traver

2003-01-01

216

Using the Pluto Controversy to Teach the Scientific Process  

NASA Astrophysics Data System (ADS)

Pluto's perilous peregrination from planet to dwarf planet to plutoid has generated an amount of public interest unparalleled since the first space mission to Jupiter. This paper reports on the results of an activity where students at a variety of grade levels were asked to assess the Pluto controversy and recommend the appropriate place of Pluto in a scale model solar system. This activity addresses aspects of the scientific process that are often difficult to treat using other learning sequences, namely: • The tentative nature of scientific knowledge • Constructing a scientific argument that supports a particular point of view, and including evidence in that argument • The way that scientific communities attempt to develop consensus about controversial issues. Data from these activities reveals that 8th grade students, college students, and adults are all still interested in Pluto and will engage with the challenge of producing a credible argument. Preliminary analyses of the papers submitted by college students doing this exercise reveals that 54% of their arguments were classified as "high quality” arguments, using scales drawn from the argumentation literature. High quality arguments use several different logical sequences, not only one, and have some degree of logical complexity. 46 % of these arguments used several pieces of evidence to back up their viewpoint. A separate paper (Shipman and Bergeron 2007) reveals that, apart from the tremendous publicity, the Pluto controversy was rather similar to other controversies in astronomy and chemistry. Thus the conclusions which students draw from Pluto have a decent chance of being applicable to science in general. This research has been supported in part by the National Science Foundation's Distinguished Teaching Scholars program.

Shipman, Harry L.

2009-01-01

217

Architectures for focal plane image processing.  

NASA Astrophysics Data System (ADS)

Architectures for focal plane image processing are discussed. On-chip image preprocessing for solid-state imagers using analog CCD circuits is described for low, medium, and high density detector arrays. A spatially parallel architecture for low density, high throughput applications is described. For sparse illumination or event detection, a content-addressable architecture is proposed. A new pipelined vector pixel processor architecture for medium density infrared staring focal plane arrays is described. Neighborhood reconstruction during serial readout of high density TV-quality imagers for a pixel processor is considered using delay and analog frame memory techniques. The potential of on-chip read/write analog frame memory for image transformation and frame-to-frame processing is discussed.

Fossum, E. R.

1989-08-01

218

Efficient Image Enhancement Algorithm Using Multi-Rate Image Processing  

NASA Astrophysics Data System (ADS)

This paper describes an efficient image enhancement method based on the Multi-Scale Retinex (MSR) approach for pre-processing of video applications. The processing amount is drastically reduced to 4 orders less than that of the original MSR, and 1 order less than the latest fast MSR method. For the efficient processing, our proposed method employs multi-stage and multi-rate filter processing which is constructed by a x-y separable and polyphase structure. In addition, the MSR association is effectively implemented during the above multi-stage processing. The method also modifies a weighting function for enhancement to improve color rendition of bright areas in an image. A variety of evaluation results show that the performance of our simplified method is similar to those of the original MSR, in terms of visual perception, contrast enhancement effects, and hue changes. Moreover, experimental results show that pre-processing of the proposed method contributes to clear foreground object separation.

Okuno, Takeshi; Nishitani, Takao

219

Evolution of image processing methods for pulsed thermal imaging  

NASA Astrophysics Data System (ADS)

Pulsed thermal imaging is a commonly used infrared thermal imaging technology for nondestructive evaluation of engineering materials. It provides a complete interrogation and therefore a potentially complete quantification of the thermal properties of a test material. Two distinct applications have been pursued in the development of data/imaging processing methods: one for material property measurement and the other for flaw or discontinuity detection. For property measurement, theoretical models for one-and multi-layer materials are used to determine thickness-averaged material properties. For flaw detection, various image-processing methods are developed to enhance and extract the thermal contrast induced by subsurface flaw/discontinuities. This study examines the evolution of these methods and compares the differences of flaw-detection methods for detection and characterization of delamination flaws.

Sun, J. G.

2013-01-01

220

Adaptive image acquisition and processing with image analysis feedback  

US Patent & Trademark Office Database

Described are systems, methods, computer programs, and user interfaces for image location, acquisition, analysis, and data correlation that uses human-in-the-loop processing, Human Intelligence Tasks (HIT), and/or or automated image processing. Results obtained using image analysis are correlated to non-spatial information useful for commerce and trade. For example, images of regions of interest of the earth are used to count items (e.g., cars in a store parking lot to predict store revenues), detect events (e.g., unloading of a container ship, or evaluating the completion of a construction project), or quantify items (e.g., the water level in a reservoir, the area of a farming plot).

2013-02-19

221

Inline coherent imaging of laser processing  

NASA Astrophysics Data System (ADS)

In applications ranging from noncontact microsurgery to semiconductor blind hole drilling, precise depth control of laser processing is essential. Even a priori characterization cannot compensate for material heterogeneity and stochasticity inherent to the material modification process. We image along the machining beam axis at high speeds (up to 312 kHz) to provide real-time feedback, even in high aspect ratio holes. The in situ metrology is based on broadband coherent imaging (similar to the medical imaging modality optical coherence tomography) and is practical for a wide-range of light sources and machining processes (e.g., thermal cutting using a quasi-continuous wave fiber laser, or nonlinear ablation achieved with ultrafast pulses). Coherent imaging has high dynamic range (> 60 dB) and strongly rejects incoherent signals allowing weak features to be observed in the presence of intense machining light and bright plasmas. High axial resolution (~5 ?m) is achieved with broadband imaging light but center wavelength can be chosen appropriate to the application. Infrared (wavelength: 1320+/-35 nm) allow simultaneous monitoring of both surface and subsurface interfaces in nonabsorbing materials like tissue and semiconductors. Silicon based detector technology can be used with near infrared imaging light (804 +/- 30 nm) enabling high speed acquisition (>300 kHz) or low cost implementation (total imaging system <10k$). Machining with an appropriate broadband ultrafast laser allows machining and imaging to be done with the same light source. Ultrafast technology also enables nonlinear optical processing of the imaging light, opening the door to improved imaging modalities.

Fraser, James M.

2011-02-01

222

Research on Teaching: Its Application to the Teaching/Learning Process.  

ERIC Educational Resources Information Center

Summarizes research that can be used to describe an effective teacher. Identifies and defines four groups of teaching behaviors, suggesting that effective teachers are already exhibiting these behaviors, but that by becoming sensitive to and/or polishing them, professional educators can move toward greater effectiveness in the schools. (HTH)

Stow, Shirley B.

1986-01-01

223

Overview on METEOSAT geometrical image data processing  

NASA Technical Reports Server (NTRS)

Digital Images acquired from the geostationary METEOSAT satellites are processed and disseminated at ESA's European Space Operations Centre in Darmstadt, Germany. Their scientific value is mainly dependent on their radiometric quality and geometric stability. This paper will give an overview on the image processing activities performed at ESOC, concentrating on the geometrical restoration and quality evaluation. The performance of the rectification process for the various satellites over the past years will be presented and the impacts of external events as for instance the Pinatubo eruption in 1991 will be explained. Special developments both in hard and software, necessary to cope with demanding tasks as new image resampling or to correct for spacecraft anomalies, are presented as well. The rotating lens of MET-5 causing severe geometrical image distortions is an example for the latter.

Diekmann, Frank J.

1994-01-01

224

DSP teleoperation for digital signal processing teaching and training via Internet  

Microsoft Academic Search

We present a project dedicated to DSP (digital signal processor\\/processing) teaching. This project is under development at INSA-Rennes and is entitled TELEDITS (TELEoperation de DSP par Internet pour le Traitement du Signal) an acronym for \\

Christophe COUTURIER; Kidiyo KPALMA; Joseph RONSIN

2002-01-01

225

Image Grammar: Using Grammatical Structures To Teach Writing.  

ERIC Educational Resources Information Center

This book is based on the premise that a writer is much like an artist who paints images, only using grammatical structures as tools. In conjunction with this approach, each chapter is divided into concepts and strategies: concepts illustrate how professional writers have applied image grammar to develop their art, and strategies provide…

Noden, Harry R.

226

Perceptions and Images of North Africa: What American Schools Teach.  

ERIC Educational Resources Information Center

Examined descriptions of North Africa (particularly Tunisia) found in U.S. high school social studies textbooks, noting the resulting perceptions and images these descriptions created in the minds of teachers and students. Data from examination of textbooks and interviews with teachers indicated that few high school students were exposed to images

Robinson, Victoria

2002-01-01

227

Real-time optical image processing techniques  

NASA Technical Reports Server (NTRS)

Nonlinear real-time optical processing on spatial pulse frequency modulation has been pursued through the analysis, design, and fabrication of pulse frequency modulated halftone screens and the modification of micro-channel spatial light modulators (MSLMs). Micro-channel spatial light modulators are modified via the Fabry-Perot method to achieve the high gamma operation required for non-linear operation. Real-time nonlinear processing was performed using the halftone screen and MSLM. The experiments showed the effectiveness of the thresholding and also showed the needs of higher SBP for image processing. The Hughes LCLV has been characterized and found to yield high gamma (about 1.7) when operated in low frequency and low bias mode. Cascading of two LCLVs should also provide enough gamma for nonlinear processing. In this case, the SBP of the LCLV is sufficient but the uniformity of the LCLV needs improvement. These include image correlation, computer generation of holograms, pseudo-color image encoding for image enhancement, and associative-retrieval in neural processing. The discovery of the only known optical method for dynamic range compression of an input image in real-time by using GaAs photorefractive crystals is reported. Finally, a new architecture for non-linear multiple sensory, neural processing has been suggested.

Liu, Hua-Kuang

1988-01-01

228

Image processing and low-discrepancy sequences  

NASA Astrophysics Data System (ADS)

It is well known that high-dimensional integral can be solved with Monte Carlo algorithms. Recently, it was discovered that there is a relationship between low discrepancy sets and the efficient evaluation of higher-dimensional integral. Theory suggests that for midsize dimensional problems, algorithms based on low discrepancy sets should outperform all other existing methods by an order of magnitude in terms of the number of sample points used to evaluate the integral. We show that the field of image processing can potentially take advantage of specific properties of low discrepancy sets. To illustrate this, we applied the theory of low discrepancy sequences to some relatively simple image processing and computer vision related operations such as the estimation of gray level image statistics, fast location of objects in a binary image and the reconstruction of images from a sparse set of points. Our experiments show that compared to standard methods, the proposed new algorithms are faster and statistically more robust. Classical low discrepancy sets based on the Halton and Sobol' sequences were investigated thoroughly and showed promising results. The use of low discrepancy sequences in image processing for image characterization, understanding and object recognition is a novel and promising area for further investigation.

Nair, Dinesh; Wenzel, Lothar

1999-11-01

229

Image Processing with Multiscale Stochastic Models  

Microsoft Academic Search

In this thesis, we develop image processing algorithms and applications for a particularclass of multiscale stochastic models. First, we provide background on the modelclass, including a discussion of its relationship to wavelet transforms and the detailsof a two-sweep algorithm for estimation. A multiscale model for the error process associatedwith this algorithm is derived. Next, we illustrate how the multiscale modelscan

Mark R. Luettgen

1993-01-01

230

Parallel Image Processing Based on CUDA  

Microsoft Academic Search

CUDA (compute unified device architecture) is a novel technology of general-purpose computing on the GPU, which makes users develop general GPU (graphics processing unit) programs easily. This paper analyzes the distinct features of CUDA GPU, summarizes the general program mode of CUDA. Furthermore, we implement several classical image processing algorithms by CUDA, such as histogram equalization, removing clouds, edge detection

Zhiyi Yang; Yating Zhu; Yong Pu

2008-01-01

231

An image processing method based on wavelet decomposition and image enhancement for blast furnace infrared image  

Microsoft Academic Search

In this paper, an image processing method based on wavelet decomposition and image enhancement is proposed to hand of the issues that there is much noise and uneven distribution of light source and light intensity, in blast furnace infrared images. Firstly, Mallat algorithm is employed to decompose blast furnace infrared images into wavelet details and lower frequency part. Then, improved

Zhu Yin; Wu Min; Cao Weihua; He Yong

2008-01-01

232

Teaching Transferable Compensatory Skills and Processes to Visually Impaired Adults.  

ERIC Educational Resources Information Center

This article presents the eight laws of association theory and applies four of them to strategies for teaching transferable skills to individuals with visual impairments. Strategies described include situation forecasting, generalization, sense shifting, performing skills repetitively to facilitate the transfer habit, and assigning an intensity…

Roberts, Alvin

2001-01-01

233

From Monologue to Dialogue: Enhancing the Teaching\\/Learning Process  

Microsoft Academic Search

This presentation is designed to facilitate participants in creating an active learning environment in the classroom. More specifically, by drawing on both theory and practice from the academic discipline of adult education, the session seeks to introduce participants to the dialogic approach to teaching and learning and show how that approach can be effectively implemented in both formal (e.g. graduate,

Frederick Milacci

2005-01-01

234

The Teaching Evaluation Process: Segmentation of Marketing Students.  

ERIC Educational Resources Information Center

A study applied the concept of market segmentation to student evaluation of college teaching, by assessing whether there exist several segments of students and how this relates to their evaluation of faculty. Subjects were 156 Australian undergraduate business administration students. Results suggest segments do exist, with different expectations…

Yau, Oliver H. M.; Kwan, Wayne

1993-01-01

235

The Principal in the Teaching and Learning Process  

ERIC Educational Resources Information Center

Today's school principal has a plethora of duties and responsibilities. Among many others, he/she is expected to supervise and monitor teacher progress in the classroom. Too frequently in the past, principals performed largely management duties in schools, but now each principal must also assist in teaching and learning situations. How might the…

Ediger, Marlow

2009-01-01

236

Digital-image processing and image analysis of glacier ice  

USGS Publications Warehouse

This document provides a methodology for extracting grain statistics from 8-bit color and grayscale images of thin sections of glacier ice—a subset of physical properties measurements typically performed on ice cores. This type of analysis is most commonly used to characterize the evolution of ice-crystal size, shape, and intercrystalline spatial relations within a large body of ice sampled by deep ice-coring projects from which paleoclimate records will be developed. However, such information is equally useful for investigating the stress state and physical responses of ice to stresses within a glacier. The methods of analysis presented here go hand-in-hand with the analysis of ice fabrics (aggregate crystal orientations) and, when combined with fabric analysis, provide a powerful method for investigating the dynamic recrystallization and deformation behaviors of bodies of ice in motion. The procedures described in this document compose a step-by-step handbook for a specific image acquisition and data reduction system built in support of U.S. Geological Survey ice analysis projects, but the general methodology can be used with any combination of image processing and analysis software. The specific approaches in this document use the FoveaPro 4 plug-in toolset to Adobe Photoshop CS5 Extended but it can be carried out equally well, though somewhat less conveniently, with software such as the image processing toolbox in MATLAB, Image-Pro Plus, or ImageJ.

Fitzpatrick, Joan J.

2013-01-01

237

Report on using TIPS (Teaching Information Processing System) in teaching physics and astronomy  

NSDL National Science Digital Library

A computer-managed instruction system, TIPS, has been used for over a decade in the teaching of diverse disciplines. This paper describes the recent use of TIPS in physics and astronomy courses at Kansas State University, Memphis State University, University of New Mexico, and University of WisconsinâGreen Bay. Student reactions to TIPS were largely positive, but the degree of success in improving student performance reported in many articles has not been observed.

Folland, Nathan; Marchini, Robert R.; Rhyner, Charles R.; Zeilik, Michael

2005-10-21

238

Parallel Implementation of Hyperspectral Image Processing Algorithms  

Microsoft Academic Search

High computing performance of algorithm analysis is essential in many hyperspectral imaging applications, including automatic target recognition for homeland defense and security, risk\\/hazard prevention and monitoring, wild-land fire tracking and biological threat detection. Despite the growing interest in hyperspectral imaging research, only a few efforts devoted to designing and implementing well-conformed parallel processing solutions currently exist in the open literature.

Antonio Plaza; David Valencia; Javier Plaza; Juan S ´ anchez-Testal; Sergio Mu; Soraya Bl

2006-01-01

239

Image processing of angiograms: A pilot study  

NASA Technical Reports Server (NTRS)

The technology transfer application this report describes is the result of a pilot study of image-processing methods applied to the image enhancement, coding, and analysis of arteriograms. Angiography is a subspecialty of radiology that employs the introduction of media with high X-ray absorption into arteries in order to study vessel pathology as well as to infer disease of the organs supplied by the vessel in question.

Larsen, L. E.; Evans, R. A.; Roehm, J. O., Jr.

1974-01-01

240

A brief review of digital image processing  

NASA Technical Reports Server (NTRS)

The review is presented with particular reference to Skylab S-192 and Landsat MSS imagery. Attention is given to rectification (calibration) processing with emphasis on geometric correction of image distortions. Image enhancement techniques (e.g., the use of high pass digital filters to eliminate gross shading to allow emphasis of the fine detail) are described along with data analysis and system considerations (software philosophy).

Billingsley, F. C.

1975-01-01

241

Retinex processing for automatic image enhancement  

NASA Astrophysics Data System (ADS)

In the last published concept (1986) for a Retinex computation, Edwin Land introduced a center/surround spatial form, which was inspired by the receptive field structures of neurophysiology. With this as our starting point we have over the years developed this concept into a full scale automatic image enhancement algorithm - the Multi-Scale Retinex with Color Restoration (MSRCR) which combines color constancy with local contrast/lightness enhancement to transform digital images into renditions that approach the realism of direct scene observation. The MSRCR algorithm has proven to be quite general purpose, and very resilient to common forms of image pre-processing such as reasonable ranges of gamma and contrast stretch transformations. More recently we have been exploring the fundamental scientific implications of this form of image processing, namely: (i) the visual inadequacy of the linear representation of digital images, (ii) the existence of a canonical or statistical ideal visual image, and (iii) new measures of visual quality based upon these insights derived from our extensive experience with MSRCR enhanced images. The lattermost serves as the basis for future schemes for automating visual assessment - a primitive first step in bringing visual intelligence to computers.

Rahman, Zia-ur; Jobson, Daniel J.; Woodell, Glenn A.

2002-06-01

242

Multidimensional approach to medical image processing  

NASA Astrophysics Data System (ADS)

This paper addresses the issue of writing image processing algorithms and programs that are independent of the dimension of the dataset. Such an approach aims at writing libraries and tool-boxes that will be smaller as well as easier to debug. The data to be processed is stored in a multi-dimensional, self-documented format describing, not only the content of the image, but also its context and the conditions of its acquisition. The work presented in this paper is based on the image kernel of the MIMOSA standard. We propose a recursive programming scheme that allows one to write general algorithms for such multi-dimensional images. Oddly enough, the design of such algorithms is easy and intuitive, thanks to the recursion. Moreover,the computational costs remains comparable to the one of dimension-specific algorithms. The cost of the recursion is indeed negligible compared to the cost of non trivial processings. We present an implementation of a reduced version of the MIMOSA image kernel, show how elementary processing such as convolution and filtering can be easily implemented. Finally we propose an algorithm for the nD fast fourier transform operating on real data.

Battle, Xavier L.; Bizais, Y.

1997-04-01

243

Results of precision processing (scene correction) of ERTS-1 images using digital image processing techniques  

NASA Technical Reports Server (NTRS)

ERTS-1 MSS and RBV data recorded on computer compatible tapes have been analyzed and processed, and preliminary results have been obtained. No degradation of intensity (radiance) information occurred in implementing the geometric correction. The quality and resolution of the digitally processed images are very good, due primarily to the fact that the number of film generations and conversions is reduced to a minimum. Processing times of digitally processed images are about equivalent to the NDPF electro-optical processor.

Bernstein, R.

1973-01-01

244

Support Routines for In Situ Image Processing  

NASA Technical Reports Server (NTRS)

This software consists of a set of application programs that support ground-based image processing for in situ missions. These programs represent a collection of utility routines that perform miscellaneous functions in the context of the ground data system. Each one fulfills some specific need as determined via operational experience. The most unique aspect to these programs is that they are integrated into the large, in situ image processing system via the PIG (Planetary Image Geometry) library. They work directly with space in situ data, understanding the appropriate image meta-data fields and updating them properly. The programs themselves are completely multimission; all mission dependencies are handled by PIG. This suite of programs consists of: (1)marscahv: Generates a linearized, epi-polar aligned image given a stereo pair of images. These images are optimized for 1-D stereo correlations, (2) marscheckcm: Compares the camera model in an image label with one derived via kinematics modeling on the ground, (3) marschkovl: Checks the overlaps between a list of images in order to determine which might be stereo pairs. This is useful for non-traditional stereo images like long-baseline or those from an articulating arm camera, (4) marscoordtrans: Translates mosaic coordinates from one form into another, (5) marsdispcompare: Checks a Left Right stereo disparity image against a Right Left disparity image to ensure they are consistent with each other, (6) marsdispwarp: Takes one image of a stereo pair and warps it through a disparity map to create a synthetic opposite- eye image. For example, a right eye image could be transformed to look like it was taken from the left eye via this program, (7) marsfidfinder: Finds fiducial markers in an image by projecting their approximate location and then using correlation to locate the markers to subpixel accuracy. These fiducial markets are small targets attached to the spacecraft surface. This helps verify, or improve, the pointing of in situ cameras, (8) marsinvrange: Inverse of marsrange . given a range file, re-computes an XYZ file that closely matches the original. . marsproj: Projects an XYZ coordinate through the camera model, and reports the line/sample coordinates of the point in the image, (9) marsprojfid: Given the output of marsfidfinder, projects the XYZ locations and compares them to the found locations, creating a report showing the fiducial errors in each image. marsrad: Radiometrically corrects an image, (10) marsrelabel: Updates coordinate system or camera model labels in an image, (11) marstiexyz: Given a stereo pair, allows the user to interactively pick a point in each image and reports the XYZ value corresponding to that pair of locations. marsunmosaic: Extracts a single frame from a mosaic, which will be created such that it could have been an input to the original mosaic. Useful for creating simulated input frames using different camera models than the original mosaic used, and (12) merinverter: Uses an inverse lookup table to convert 8-bit telemetered data to its 12-bit original form. Can be used in other missions despite the name.

Deen, Robert G.; Pariser, Oleg; Yeates, Matthew C.; Lee, Hyun H.; Lorre, Jean

2013-01-01

245

MedPix Radiology Teaching Files & Medical Image Database  

NSDL National Science Digital Library

For students of radiology and related fields, this database will be a most welcome find. Created by the team behind MedPix, the site includes thousands of radiology images designed to be used as educational tools. Visitors can click on the Picture of the Day to get started, and then head on over to the Weekly Quiz to test their mettle. The Radiology Tutor section includes nine different tutorials that cover topics such as Trauma, Vascular, Technique, and General Principles. The Brain Lesion Locator can help visitors learn about identifying different brain lesions via radiological images. The site is rounded out by seven different practice exams that will help visitors strengthen their basic understanding of radiological images.

2012-02-17

246

Processing infrared images of aircraft lapjoints  

NASA Astrophysics Data System (ADS)

Techniques for processing IR images of aging aircraft lapjoint data are discussed. Attention is given to a technique for detecting disbonds in aircraft lapjoints which clearly delineates the disbonded region from the bonded regions. The technique is weak on unpainted aircraft skin surfaces, but can be overridden by using a self-adhering contact sheet. Neural network analysis on raw temperature data has been shown to be an effective tool for visualization of images. Numerical simulation results show the above processing technique to be an effective tool in delineating the disbonds.

Syed, Hazari; Winfree, William P.; Cramer, K. E.

1992-04-01

247

Image Processing Application for Cognition (IPAC) - Traditional and Emerging Topics in Image Processing in Astronomy (Invited)  

Microsoft Academic Search

A new application framework for advanced image processing for astronomy is presented. It implements standard two-dimensional operators, and recent developments in the field of non-astronomical image processing (IP), as well as original algorithms based on nonlinear partial differential equations (PDE). These algorithms are especially well suited for multi-scale astronomical images since they increase signal to noise ratio without smearing localized

M. Pesenson; W. Roby; G. Helou; B. McCollum; L. Ly; X. Wu; S. Laine; B. Hartley

2008-01-01

248

VIPS: an image processing system for large images  

NASA Astrophysics Data System (ADS)

This paper describes VIPS (VASARI Image Processing System), an image processing system developed by the authors in the course of the EU-funded projects VASARI (1989-1992) and MARC (1992-1995). VIPS implements a fully demand-driven dataflow image IO (input- output) system. Evaluation of library functions is delayed for as long as possible. When evaluation does occur, all delayed operations evaluate together in a pipeline, requiring no space for storing intermediate images and no unnecessary disc IO. If more than one CPU is available, then VIPS operations will automatically evaluate in parallel, giving an approximately linear speed-up. The evaluation system can be controlled by the application programmer. We have implemented a user-interface for the VIPS library which uses expose events in an X window rather than disc output to drive evaluation. This makes it possible, for example, for the user to rotate an 800 MByte image by 12 degrees and immediately scroll around the result.

Cupitt, John; Martinez, Kirk

1996-02-01

249

Contour Stencils and Variational Image Processing  

NASA Astrophysics Data System (ADS)

The first part of this thesis is on contour stencils, a new method for edge adaptive image processing. We focus particularly on image zooming, which is the problem of increasing the resolution of a given image. An important aspect of zooming is accurate estimation of edge orientations. Contour stencils is a new method for estimating the image contours based on total variation along curves. Contour stencils are applied in designing several edge-adaptive color zooming methods. These zooming methods fall at different points in the balance between speed and quality. One of these zooming methods, contour stencil windowed zooming, is particular successful. Although most zooming methods require either solving a large linear system or running many iterations, this method has linear complexity in the number of pixels and can be computed in a single pass through the image. The zoomed image is constructed as a function that may be sampled anywhere, enabling arbitrary resampling operations. Comparisons show that contour stencil zooming methods are competitive with existing methods. Applications of contour stencils to corner detection and image enhancement are also illustrated. The second part of this thesis is on topics in variational image processing. First, we apply variational techniques to formulate a total variation optimal prediction in Harten multiresolution schemes. We show that this prediction is well-defined, construct a Harten multiresolution using this prediction, and show that a modified encoding strategy is possible for approximation using the scheme. We also investigate the efficient numerical solution of the prediction and compare several different algorithms. Examples show that image approximation with this scheme is competitive with the CDF 9/7 wavelet. Next, we investigate nonconvex potentials in variational image problems. For the approximate solution of these nonconvex problems, we develop a particle swarm optimization like algorithm that avoids becoming trapped in shallow local minima. Examples in denoising and image zooming show that the method can outperform gradient descent. Finally, the last topic is on image restoration with Rician noise. Total variation regularization is usually applied with L² data fidelity assuming an additive white Gaussian noise model. However, better results are possible when the noise model accurately describes the noise in the given image. Total variation denoising has already been developed with the Laplace noise model (L¹ data fidelity) and the Poisson noise model. A challenge with Rician noise is that the resulting objective function is nonconvex. We develop a convex variational problem that closely approximates the Rician noise model. The problem is efficiently solved using the split Bregman method.

Getreuer, Pascal Tom

250

Interactive Computer Assisted Instruction in Teaching of Process Analysis and Simulation.  

ERIC Educational Resources Information Center

To improve the instructional process, time shared computer-assisted instructional methods were developed to teach upper division undergraduate chemical engineering students the concepts of process simulation and analysis. The interactive computer simulation aimed at enabling the student to learn the difficult concepts of process dynamics by…

Nuttall, Herbert E., Jr.; Himmelblau, David M.

251

Image processing algorithms for ocular fundus reflectometry  

NASA Astrophysics Data System (ADS)

Ocular fundus reflectometry is a technique aimed at the in-vivo measurement of the reflectance of the tissues of the ocular fundus. Studies have demonstrated a correlation between optical and physiological properties of such tissues in humans and the existence of a control mechanism, called neuro-vascular coupling (NC), which adjusts local blood perfusion to support vision-induced neural activity. We developed an instrument for functional imaging of the neural tissues of the ocular fundus based on reflectance measurements to study the NC. The images acquired with the instrument needed processing to work out reflectance time-courses. The algorithm exploited previously requires long computational time, provides poor discrimination of objects and need manual intervention. We have developed a fully automatic algorithm based on differential multiscale framework for the processing of the images of the ocular fundus with reduced computational time. This algorithm is reasonably efficient to determine relative translational displacement (translation and rotation) between the images and also to remove the geometric distortion. Simulation results performed on the fundus images show that differential multiscale framework based image registration reduces computational times up-to one fourth of the time required by the general purpose algorithm, and provides better alignment precision.

Palanisamy, Nithiyanantham; Bruschi, Ilaria; Bonaiuti, Matteo; Rovati, Luigi; Riva, Charles E.

2010-02-01

252

[The problem approach in the teaching-learning process of communication].  

PubMed

This article reports on an experience in the teaching of communication theory to nurse technician students in Curitiba, based on the use of problem solving skills. The results ratified Stefanelli's proposition concerning the teaching-learning process of the contents about human and therapeutic communication. Therapeutic communication strategies facilitate students' understanding, as well as the use of therapeutic communication in their relationship with patients. Learning was effective because teacher and students shared a common goal: the quality of nursing care. PMID:12138426

Maftum, M A; Mazza, V A; Stefanelli, M C

2000-01-01

253

Processing Images of Craters for Spacecraft Navigation  

NASA Technical Reports Server (NTRS)

A crater-detection algorithm has been conceived to enable automation of what, heretofore, have been manual processes for utilizing images of craters on a celestial body as landmarks for navigating a spacecraft flying near or landing on that body. The images are acquired by an electronic camera aboard the spacecraft, then digitized, then processed by the algorithm, which consists mainly of the following steps: 1. Edges in an image detected and placed in a database. 2. Crater rim edges are selected from the edge database. 3. Edges that belong to the same crater are grouped together. 4. An ellipse is fitted to each group of crater edges. 5. Ellipses are refined directly in the image domain to reduce errors introduced in the detection of edges and fitting of ellipses. 6. The quality of each detected crater is evaluated. It is planned to utilize this algorithm as the basis of a computer program for automated, real-time, onboard processing of crater-image data. Experimental studies have led to the conclusion that this algorithm is capable of a detection rate >93 percent, a false-alarm rate <5 percent, a geometric error <0.5 pixel, and a position error <0.3 pixel.

Cheng, Yang; Johnson, Andrew E.; Matthies, Larry H.

2009-01-01

254

Teaching With Second Life ®: Hemorrhage Management as an Example of a Process for Developing Simulations for Multiuser Virtual Environments  

Microsoft Academic Search

This article describes the process used for developing a simulation in Second Life®, a multiuser virtual environment. The aim of the project was to increase our awareness and skills in using Second Life as a teaching medium and to teach postpartum hemorrhage management to undergraduate nursing students. The experience gained in this project is the result of a collaborative teaching

Michelle Honey; Kelley Connor; Max Veltman; David Bodily; Scott Diener

255

Simultaneous perturbation method for processing magnetospheric images  

NASA Astrophysics Data System (ADS)

Extracting a multivariate nonlinear physical model from a set of satellite images is considered as a multivariate nonlinear regression problem. Multiple local solutions often prevent gradient type algorithms from obtaining global optimal solutions. A method of solving this problem is presented based on the simultaneous perturbation stochastic approximation (SPSA) algorithm. The method is applied to a problem of estimating the distribution of energetic ion populations in the magnetosphere from global images of the magnetosphere. The approach uses multiple objective functions: single image errors and the summation of square image errors. The algorithm is demonstrated on simulated energetic-neutral atom images. Within a reasonable number of function evaluations, the process converges and reconstructs the images with a mean square error less than or equal to 0.1% of the original image. Also, the SPSA method is compared with results obtained from simulated annealing (SAN) in a single objective function setting. In the comparison study, SPSA has a 3:1 advantage over SAN in both accuracy and efficiency measures.

Chin, Daniel C.

1999-04-01

256

SATI image processing and mesopause temperature determination  

NASA Astrophysics Data System (ADS)

The Spectral Airglow Temperature Imager (SATI) instrument registers airglow coming from an annular mesopause segment. The temperatures of various points of this segment are retrieved by sectors of the registered images containing spectral information. A stage of SATI spectrogram processing connected with deriving spectral information from images and the determination of the rotational temperature of oxygen molecules emitting at the altitude of the mesopause is considered. A "moving sector" approach for sector spectra calculation is proposed. Typical for this approach is the possibility for varying the number of calculated sector spectra from one image and the sector angle. The sector angle may be selected depending on the quality features of the images. Two versions, one based on averaging and a second - based on finding the median of the values of all pixels at equal distance from the image center are developed. The determination of a mean temperature based on a whole image mean spectrum is considered as a potential source of systematic and gross errors. A determination of the mean temperature by averaging sector temperatures is proposed. Applying criteria for evaluating the usability of sector temperatures based on azimuthal distribution of sector errors, emission intensities and backgrounds is possible. The moving sector approach is useful with the possibility for a detailed visual evaluation of the azimuthal distribution of retrieved sector variables - rotational temperature, emission rate, background and error.

Atanassov, Atanas Marinov

2012-11-01

257

Enhanced neutron imaging detector using optical processing  

SciTech Connect

Existing neutron imaging detectors have limited count rates due to inherent property and electronic limitations. The popular multiwire proportional counter is qualified by gas recombination to a count rate of less than 10{sup 5} n/s over the entire array and the neutron Anger camera, even though improved with new fiber optic encoding methods, can only achieve 10{sup 6} cps over a limited array. We present a preliminary design for a new type of neutron imaging detector with a resolution of 2--5 mm and a count rate capability of 10{sup 6} cps pixel element. We propose to combine optical and electronic processing to economically increase the throughput of advanced detector systems while simplifying computing requirements. By placing a scintillator screen ahead of an optical image processor followed by a detector array, a high throughput imaging detector may be constructed.

Hutchinson, D.P.; McElhaney, S.A.

1992-08-01

258

Enhanced neutron imaging detector using optical processing  

SciTech Connect

Existing neutron imaging detectors have limited count rates due to inherent property and electronic limitations. The popular multiwire proportional counter is qualified by gas recombination to a count rate of less than 10{sup 5} n/s over the entire array and the neutron Anger camera, even though improved with new fiber optic encoding methods, can only achieve 10{sup 6} cps over a limited array. We present a preliminary design for a new type of neutron imaging detector with a resolution of 2--5 mm and a count rate capability of 10{sup 6} cps pixel element. We propose to combine optical and electronic processing to economically increase the throughput of advanced detector systems while simplifying computing requirements. By placing a scintillator screen ahead of an optical image processor followed by a detector array, a high throughput imaging detector may be constructed.

Hutchinson, D.P.; McElhaney, S.A.

1992-01-01

259

Mariner 9-Image processing and products  

USGS Publications Warehouse

The purpose of this paper is to describe the system for the display, processing, and production of image-data products created to support the Mariner 9 Television Experiment. Of necessity, the system was large in order to respond to the needs of a large team of scientists with a broad scope of experimental objectives. The desire to generate processed data products as rapidly as possible to take advantage of adaptive planning during the mission, coupled with the complexities introduced by the nature of the vidicon camera, greatly increased the scale of the ground-image processing effort. This paper describes the systems that carried out the processes and delivered the products necessary for real-time and near-real-time analyses. References are made to the computer algorithms used for the, different levels of decalibration and analysis. ?? 1973.

Levinthal, E. C.; Green, W. B.; Cutts, J. A.; Jahelka, E. D.; Johansen, R. A.; Sander, M. J.; Seidman, J. B.; Young, A. T.; Soderblom, L. A.

1973-01-01

260

From Content-based Image Retrieval to Example-based Image Processing  

Microsoft Academic Search

This paper presents a novel application framework for content-based image retrieval (CBIR) technology. We use CBIR to (semi-) automatically obtain image clusters containing certain homogenous image statistics, and then use the images in the clusters as examples for learning (or example) based image processing. We demonstrate the potential of the new image processing paradigm by developing applications for color image

Guoping Qiu

261

Web-based document image processing  

NASA Astrophysics Data System (ADS)

Increasing numbers of research libraries are turning to the Internet for electron interlibrary loan and for document delivery to patrons. This has been made possible through the widespread adoption of software such as Ariel and DocView. Ariel, a product of the Research Libraries Group, converts paper-based documents to monochrome bitmapped images, and delivers them over the Internet. The National Library of Medicine's DocView is primarily designed for library patrons are beginning to reap the benefits of this new technology, barriers exist, e.g., differences in image file format, that lead to difficulties in the use of library document information. To research how to overcome such barriers, the Communications Engineering Branch of the Lister Hill National Center for Biomedical Communications, an R and D division of NLM, has developed a web site called the DocMorph Server. This is part of an ongoing intramural R and D program in document imaging that has spanned many aspects of electronic document conversion and preservation, Internet document transmission and document usage. The DocMorph Server Web site is designed to fill two roles. First, in a role that will benefit both libraries and their patrons, it allows Internet users to upload scanned image files for conversion to alternative formats, thereby enabling wider delivery and easier usage of library document information. Second, the DocMorph Server provides the design team an active test bed for evaluating the effectiveness and utility of new document image processing algorithms and functions, so that they may be evaluated for possible inclusion in other image processing software products being developed at NLM or elsewhere. This paper describes the design of the prototype DocMorph Server and the image processing functions being implemented on it.

Walker, Frank L.; Thoma, George R.

1999-12-01

262

Digital image processing of vascular angiograms  

NASA Technical Reports Server (NTRS)

The paper discusses the estimation of the degree of atherosclerosis in the human femoral artery through the use of a digital image processing system for vascular angiograms. The film digitizer uses an electronic image dissector camera to scan the angiogram and convert the recorded optical density information into a numerical format. Another processing step involves locating the vessel edges from the digital image. The computer has been programmed to estimate vessel abnormality through a series of measurements, some derived primarily from the vessel edge information and others from optical density variations within the lumen shadow. These measurements are combined into an atherosclerosis index, which is found in a post-mortem study to correlate well with both visual and chemical estimates of atherosclerotic disease.

Selzer, R. H.; Beckenbach, E. S.; Blankenhorn, D. H.; Crawford, D. W.; Brooks, S. H.

1975-01-01

263

Matlab-supported undergraduate image processing instruction  

Microsoft Academic Search

More and more often, undergraduate students express the desire to take a course on image processing. These students will learn the most if the theory and algorithms covered in class can be not only illustrated through examples shown by the instructor during class but also coded, tested, and evaluated by the class participants. In the past, the major hurdle to

Benoit M. Dawant

1998-01-01

264

Center for Image Processing in Education  

NSDL National Science Digital Library

The Center for Image Processing in Education (CIPE) was a not-for-profit organization that promoted computer-aided visualization as a tool for inquiry-based learning. The CIPE materials are now held by Science Approach. These web pages provide descriptions of the CIPE projects, and links to resources where appropriate.

Education, Center F.

2005-01-04

265

Recent Advances in Remote Sensing Image Processing  

Microsoft Academic Search

Remote sensing image processing is nowadays a mature re- search area. The techniques developed in the field allow many real-life applications with great societal value. For inst ance, urban monitoring, fire detection or flood prediction can have a great impact on economical and environmental issues. To at- tain such objectives, the remote sensing community has turned into a multidisciplinary field

Devis Tuia; Gustavo Camps-Valls

2009-01-01

266

Cubic convolution interpolation for digital image processing  

Microsoft Academic Search

Cubic convolution interpolation is a new technique for resampling discrete data. It has a number of desirable features which make it useful for image processing. The technique can be performed efficiently on a digital computer. The cubic convolution interpolation function converges uniformly to the function being interpolated as the sampling increment approaches zero. With the appropriate boundary conditions and constraints

ROBERT G. KEYS

1981-01-01

267

Stochastic processes, estimation theory and image enhancement  

NASA Technical Reports Server (NTRS)

An introductory account of stochastic processes, estimation theory, and image enhancement is presented. The book is primarily intended for first-year graduate students and practicing engineers and scientists whose work requires an acquaintance with the theory. Fundamental concepts of probability were reviewed that are required to support the main topics. The appendices discuss the remaining mathematical background.

Assefi, T.

1978-01-01

268

Limiting liability via high resolution image processing  

SciTech Connect

The utilization of high resolution image processing allows forensic analysts and visualization scientists to assist detectives by enhancing field photographs, and by providing the tools and training to increase the quality and usability of field photos. Through the use of digitized photographs and computerized enhancement software, field evidence can be obtained and processed as `evidence ready`, even in poor lighting and shadowed conditions or darkened rooms. These images, which are most often unusable when taken with standard camera equipment, can be shot in the worst of photographic condition and be processed as usable evidence. Visualization scientists have taken the use of digital photographic image processing and moved the process of crime scene photos into the technology age. The use of high resolution technology will assist law enforcement in making better use of crime scene photography and positive identification of prints. Valuable court room and investigation time can be saved and better served by this accurate, performance based process. Inconclusive evidence does not lead to convictions. Enhancement of the photographic capability helps solve one major problem with crime scene photos, that if taken with standard equipment and without the benefit of enhancement software would be inconclusive, thus allowing guilty parties to be set free due to lack of evidence.

Greenwade, L.E.; Overlin, T.K.

1996-12-31

269

Improving Synthetic Aperture Image by Image Compounding in Beamforming Process  

NASA Astrophysics Data System (ADS)

In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a polarity function and a threshold criterium are used to develop an image compounding technique. The spatial diversity is increased using an additional array, which generates complementary information about the defects, improving the results of the proposed algorithm and producing high resolution and contrast images. The inspection of isotropic plate-like structures using linear arrays and Lamb waves is presented. Experimental results are shown for a 1-mm-thick isotropic aluminum plate with artificial defects using linear arrays formed by 30 piezoelectric elements, with the low dispersion symmetric mode S0 at the frequency of 330 kHz.

Martínez-Graullera, Oscar; Higuti, Ricardo T.; Martín, Carlos J.; Ullate, Luis. G.; Romero, David; Parrilla, Montserrat

2011-06-01

270

''Virtual Welding,'' a new aid for teaching Manufacturing Process Engineering  

NASA Astrophysics Data System (ADS)

Overcrowding in the classroom is a serious problem in universities, particularly in specialties that require a certain type of teaching practice. These practices often require expenditure on consumables and a space large enough to hold the necessary materials and the materials that have already been used. Apart from the budget, another problem concerns the attention paid to each student. The use of simulation systems in the early learning stages of the welding technique can prove very beneficial thanks to error detection functions installed in the system, which provide the student with feedbach during the execution of the practice session, and the significant savings in both consumables and energy.

Portela, José M.; Huerta, María M.; Pastor, Andrés; Álvarez, Miguel; Sánchez-Carrilero, Manuel

2009-11-01

271

Broad-source image plane holography as a confocal imaging process.  

PubMed

The process of image plane holography with incoherent illumination has many significant properties. The process can produce extremely high-quality, low-noise images, section slicing, image formation through inhomogeneities, and high-resolution image formation through small apertures. The process of confocal imaging has similar properties. We describe the similarities and differences between the two processes. PMID:20862054

Sun, P C; Leith, E N

1994-02-01

272

Design considerations of color image processing pipeline for digital cameras  

Microsoft Academic Search

Although many individual image processing steps have been well addressed in the field, very few good image pipeline designs were proposed to integrate these processing stages. In this paper, a new color image processing pipeline (IPP), which processes the image raw data captured from CCD\\/CMOS sensors and converts to the final color with exposure corrected, is presented, it bridges the

Wen-Chung Kao; Sheng-Hong Wang; Lien-Yang Chen; Sheng-Yuan Lin

2006-01-01

273

Subband/transform functions for image processing  

NASA Technical Reports Server (NTRS)

Functions for image data processing written for use with the MATLAB(TM) software package are presented. These functions provide the capability to transform image data with block transformations (such as the Walsh Hadamard) and to produce spatial frequency subbands of the transformed data. Block transforms are equivalent to simple subband systems. The transform coefficients are reordered using a simple permutation to give subbands. The low frequency subband is a low resolution version of the original image, while the higher frequency subbands contain edge information. The transform functions can be cascaded to provide further decomposition into more subbands. If the cascade is applied to all four of the first stage subbands (in the case of a four band decomposition), then a uniform structure of sixteen bands is obtained. If the cascade is applied only to the low frequency subband, an octave structure of seven bands results. Functions for the inverse transforms are also given. These functions can be used for image data compression systems. The transforms do not in themselves produce data compression, but prepare the data for quantization and compression. Sample quantization functions for subbands are also given. A typical compression approach is to subband the image data, quantize it, then use statistical coding (e.g., run-length coding followed by Huffman coding) for compression. Contour plots of image data and subbanded data are shown.

Glover, Daniel

1993-01-01

274

EOS image data processing system definition study  

NASA Technical Reports Server (NTRS)

The Image Processing System (IPS) requirements and configuration are defined for NASA-sponsored advanced technology Earth Observatory System (EOS). The scope included investigation and definition of IPS operational, functional, and product requirements considering overall system constraints and interfaces (sensor, etc.) The scope also included investigation of the technical feasibility and definition of a point design reflecting system requirements. The design phase required a survey of present and projected technology related to general and special-purpose processors, high-density digital tape recorders, and image recorders.

Gilbert, J.; Honikman, T.; Mcmahon, E.; Miller, E.; Pietrzak, L.; Yorsz, W.

1973-01-01

275

The Guidance Role of the Instructor in the Teaching and Learning Process  

ERIC Educational Resources Information Center

This study examines the guidance role of the instructor in the teaching and learning process. The paper x-rays the need for the learners to be consciously guided by their teachers as this facilitates and complements the learning process. Gagne's theory of conditions of learning, phases of learning and model for design of instruction was adopted to…

Alutu, Azuka N. G.

2006-01-01

276

Teaching Hardware Design of Fixed-Point Digital Signal Processing Systems  

Microsoft Academic Search

Signal processing theory and practice are enabling and driving forces behind multimedia de- vices, communications systems, and even such diverse fields as automotive and medical sys- tems. Over 90% of the signal processing systems on the market used fixed-point arithmetic because of the cost, power, and area savings that fixed-point systems provide. However, most colleges and universities do not teach

David V. Anderson; Tyson S. Hall

277

A Four Stage Process of Cooperative Teaching for Beginning University Teachers Meeting First Year University Students  

Microsoft Academic Search

A four stage process of co-operative teaching for beginning university teachers meeting first year groups of students provides a structured way in which classes can be developed. Through a process of induction, barriers to classroom participation are minimised, roles are clarified, academic goals are considered and an active knowledge concept is introduced. Students are encouraged to critically assess their own

JOANNA KIDMAN; KEN STEVENS

278

The Practice of Information Processing Model in the Teaching of Cognitive Strategies  

ERIC Educational Resources Information Center

In this research, the differentiation condition of teaching the learning strategies depending on the time which the first grade of primary school teachers carried out to form an information-process skeleton on student is tried to be found out. This process including the efforts of 260 teachers in this direction consists of whether the adequate…

Ozel, Ali

2009-01-01

279

Architecture for web-based image processing  

NASA Astrophysics Data System (ADS)

A computer systems architecture for processing medical images and other data coming over the Web is proposed. The architecture comprises a Java engine for communicating images over the Internet, storing data in local memory, doing floating point calculations, and a coprocessor MIMD parallel DSP for doing fine-grained operations found in video, graphics, and image processing applications. The local memory is shared between the Java engine and the parallel DSP. Data coming from the Web is stored in the local memory. This approach avoids the frequent movement of image data between a host processor's memory and an image processor's memory, found in many image processing systems. A low-power and high performance parallel DSP architecture containing lots of processors interconnected by a segmented hierarchical network has been developed. The instruction set of the 16-bit processor supports video, graphics, and image processing calculations. Two's complement arithmetic, saturation arithmetic, and packed instructions are supported. Higher data precision such as 32-bit and 64-bit can be achieved by cascading processors. A VLSI chip implementation of the architecture containing 64 processors organized in 16 clusters and interconnected by a statically programmable hierarchical bus is in progress. The buses are segmentable by programming switches on the bus. The instruction memory of each processor has sixteen 40-bit words. Data streaming through the processor is manipulated by the instructions. Multiple operations can be performed in a single cycle in a processor. A low-power handshake protocol is used for synchronization between the sender and the receiver of data. Temporary storage for data and filter coefficients is provided in each chip. A 256 by 16 memory unit is included in each of the 16 clusters. The memory unit can be used as a delay line, FIFO, lookup table or random access memory. The architecture is scalable with technology. Portable multimedia terminals like U.C. Berkeley's InfoPad can be developed using the proposed parallel DSP architecture, color display, pen interface, and wireless network communication for use in clinics, hospitals, homes, offices, and factories.

Srini, Vason P.; Pini, David; Armstrong, Matt D.; Alalusi, Sayf H.; Thendean, John; Ueng, Sain-Zee; Bushong, David P.; Borowski, Erek S.; Chao, Elaine; Rabaey, Jan M.

1997-09-01

280

IMAGE 100: The interactive multispectral image processing system  

NASA Technical Reports Server (NTRS)

The need for rapid, cost-effective extraction of useful information from vast quantities of multispectral imagery available from aircraft or spacecraft has resulted in the design, implementation and application of a state-of-the-art processing system known as IMAGE 100. Operating on the general principle that all objects or materials possess unique spectral characteristics or signatures, the system uses this signature uniqueness to identify similar features in an image by simultaneously analyzing signatures in multiple frequency bands. Pseudo-colors, or themes, are assigned to features having identical spectral characteristics. These themes are displayed on a color CRT, and may be recorded on tape, film, or other media. The system was designed to incorporate key features such as interactive operation, user-oriented displays and controls, and rapid-response machine processing. Owing to these features, the user can readily control and/or modify the analysis process based on his knowledge of the input imagery. Effective use can be made of conventional photographic interpretation skills and state-of-the-art machine analysis techniques in the extraction of useful information from multispectral imagery. This approach results in highly accurate multitheme classification of imagery in seconds or minutes rather than the hours often involved in processing using other means.

Schaller, E. S.; Towles, R. W.

1975-01-01

281

Anisotropic Processing of Laser Speckle Images Improves Spatiotemporal Resolution  

Microsoft Academic Search

Laser speckle contrast imaging (LSCI) is a full field optical imaging technique, capable of imaging blood flow without the introduction of any exogenous dyes. Spatial and temporal resolution in LSCI images depend on how pixels are chosen from the raw image stack for contrast processing. However, all processing schemes are based on isotropic treatment of the spatial neighborhood about each

Abhishek Rege; Janaka Senarathna; Nan Li; Nitish V. Thakor

2012-01-01

282

Images of a 'good nurse' presented by teaching staff.  

PubMed

Nursing is at the same time a vocation, a profession and a job. By nature, nursing is a moral endeavor, and being a 'good nurse' is an issue and an aspiration for professionals. The aim of our qualitative research project carried out with 18 nurse teachers at a university nursing school in Brazil was to identify the ethical image of nursing. In semistructured interviews the participants were asked to choose one of several pictures, to justify their choice and explain what they meant by an ethical nurse. Five different perspectives were revealed: good nurses fulfill their duties correctly; they are proactive patient advocates; they are prepared and available to welcome others as persons; they are talented, competent, and carry out professional duties excellently; and they combine authority with power sharing in patient care. The results point to a transition phase from a historical introjection of religious values of obedience and service to a new sense of a secular, proactive, scientific and professional identity. PMID:21097967

de Araujo Sartorio, Natalia; Pavone Zoboli, Elma Lourdes Campos

2010-11-01

283

High Performance Image Processing on FPGAs  

Microsoft Academic Search

This paper presents the high level, single- assignment programming language SA-C and its optimizing compiler targeting reconfigurable sys- tems. SA-C is intended for Image Processing appli- cations. Language features are introduced and dis- cussed. The intermediate forms DDCF, DFG and AHA, used in the optimization and code-generation phases are described. Conventional and recon- figurable system specific optimizations are intro- duced.

J. Hammes; A. P. W. Bohm; C. Ross; M. Chawathe; B. Draper; W. Najjar

284

Image Processing Techniques for Glaucoma Detection  

Microsoft Academic Search

\\u000a Glaucoma is a disease caused due to neurodegeneration of the optic nerve which leads to blindness. It can be evaluated by\\u000a monitoring intra ocular pressure (IOP), visual field and the optic disc appearance (cup-to-disc ratio). Glaucoma increases\\u000a the cup to disc ratio (CDR), affecting the peripheral vision loss. This paper addresses the various image processing techniques\\u000a to diagnose the glaucoma

Mishra Madhusudhan; Nath Malay; S. R. Nirmala; Dandapat Samerendra

285

IPLIB (Image processing library) user's manual  

NASA Technical Reports Server (NTRS)

IPLIB is a collection of HP FORTRAN 77 subroutines and functions that facilitate the use of a COMTAL image processing system driven by an HP-1000 computer. It is intended for programmers who want to use the HP 1000 to drive the COMTAL Vision One/20 system. It is assumed that the programmer knows HP 1000 FORTRAN 77 or at least one FORTRAN dialect. It is also assumed that the programmer has some familiarity with the COMTAL Vision One/20 system.

Faulcon, N. D.; Monteith, J. H.; Miller, K.

1985-01-01

286

Digital image processing for system identification  

Microsoft Academic Search

Emerging digital image processing techniques are utilized to demonstrate their potential applications in earthquake engineering, particularly in the area of system identification. In this respect, the objectives of this research are to demonstrate the underlying principle that permits nonlinear system identification, non-intrusively and remotely, with the aid of CCD camera and, for the purpose of the proof-of-concept, to apply the

Masanobu Shinozuka; HungChi Chung; Jianwen Liang

2000-01-01

287

Digital image processing of vascular angiograms  

NASA Technical Reports Server (NTRS)

A computer image processing technique was developed to estimate the degree of atherosclerosis in the human femoral artery. With an angiographic film of the vessel as input, the computer was programmed to estimate vessel abnormality through a series of measurements, some derived primarily from the vessel edge information and others from optical density variations within the lumen shadow. These measurements were combined into an atherosclerosis index, which was found to correlate well with both visual and chemical estimates of atherosclerotic disease.

Selzer, R. H.; Blankenhorn, D. H.; Beckenbach, E. S.; Crawford, D. W.; Brooks, S. H.

1975-01-01

288

Image processing of the grinding wheel surface  

Microsoft Academic Search

Identifying the situation of grinding wheel wear and loading is a very important issue for high-efficiency grinding operations.\\u000a This paper presents a new method that detects and identifies the chip loading and cutting edge wear of a grinding wheel using\\u000a the image processing toolbox of the MATLAB package. The different optical characters of the metal chips and the abrasive grains

Z. Feng; X. Chen

2007-01-01

289

Image processing of grinding wheel surface  

Microsoft Academic Search

Identifying the situation of grinding wheel wear and loading is a very important issue for high efficiency grinding operations.\\u000a This paper presents a new method that detects and identifies the chip loading and cutting edge wear of a grinding wheel using\\u000a the image processing toolbox of MATLAB. The different optical characters of the metal chips and the abrasive grains are

Z. Feng; X. Chen

2007-01-01

290

Automated synthesis of image processing procedures using AI planning techniques  

NASA Technical Reports Server (NTRS)

This paper describes the Multimission VICAR (Video Image Communication and Retrieval) Planner (MVP) (Chien 1994) system, which uses artificial intelligence planning techniques (Iwasaki & Friedland, 1985, Pemberthy & Weld, 1992, Stefik, 1981) to automatically construct executable complex image processing procedures (using models of the smaller constituent image processing subprograms) in response to image processing requests made to the JPL Multimission Image Processing Laboratory (MIPL). The MVP system allows the user to specify the image processing requirements in terms of the various types of correction required. Given this information, MVP derives unspecified required processing steps and determines appropriate image processing programs and parameters to achieve the specified image processing goals. This information is output as an executable image processing program which can then be executed to fill the processing request.

Chien, Steve; Mortensen, Helen

1994-01-01

291

Color Image Processing and Object Tracking System  

NASA Technical Reports Server (NTRS)

This report describes a personal computer based system for automatic and semiautomatic tracking of objects on film or video tape, developed to meet the needs of the Microgravity Combustion and Fluids Science Research Programs at the NASA Lewis Research Center. The system consists of individual hardware components working under computer control to achieve a high degree of automation. The most important hardware components include 16-mm and 35-mm film transports, a high resolution digital camera mounted on a x-y-z micro-positioning stage, an S-VHS tapedeck, an Hi8 tapedeck, video laserdisk, and a framegrabber. All of the image input devices are remotely controlled by a computer. Software was developed to integrate the overall operation of the system including device frame incrementation, grabbing of image frames, image processing of the object's neighborhood, locating the position of the object being tracked, and storing the coordinates in a file. This process is performed repeatedly until the last frame is reached. Several different tracking methods are supported. To illustrate the process, two representative applications of the system are described. These applications represent typical uses of the system and include tracking the propagation of a flame front and tracking the movement of a liquid-gas interface with extremely poor visibility.

Klimek, Robert B.; Wright, Ted W.; Sielken, Robert S.

1996-01-01

292

Digital image processing for information extraction.  

NASA Technical Reports Server (NTRS)

The modern digital computer has made practical image processing techniques for handling nonlinear operations in both the geometrical and the intensity domains, various types of nonuniform noise cleanup, and the numerical analysis of pictures. An initial requirement is that a number of anomalies caused by the camera (e.g., geometric distortion, MTF roll-off, vignetting, and nonuniform intensity response) must be taken into account or removed to avoid their interference with the information extraction process. Examples illustrating these operations are discussed along with computer techniques used to emphasize details, perform analyses, classify materials by multivariate analysis, detect temporal differences, and aid in human interpretation of photos.

Billingsley, F. C.

1973-01-01

293

Applications of Computational Verbs to Digital Image Processing  

Microsoft Academic Search

The digital image processing technology based on computational verb theory is presented. If images are viewed as dynamic processes along spatial coordinates then the changes of patterns of gray values can be represented as spatial verbs. The basic principles of verb image processing is to find the relation between an image and a template spatial verb. In order to reduce

Tao Yang

2005-01-01

294

Using NASA Space Imaging Technology to Teach Earth and Sun Topics  

NASA Astrophysics Data System (ADS)

We teach an experimental college-level course, directed toward elementary education majors, emphasizing "hands-on" activities that can be easily applied to the elementary classroom. This course, Physics 240: "The Sun-Earth Connection" includes various ways to study selected topics in physics, earth science, and basic astronomy. Our lesson plans and EPO materials make extensive use of NASA imagery and cover topics about magnetism, the solar photospheric, chromospheric, coronal spectra, as well as earth science and climate. In addition we are developing and will cover topics on ecosystem structure, biomass and water on Earth. We strive to free the non-science undergraduate from the "fear of science" and replace it with the excitement of science such that these future teachers will carry this excitement to their future students. Hands-on experiments, computer simulations, analysis of real NASA data, and vigorous seminar discussions are blended in an inquiry-driven curriculum to instill confident understanding of basic physical science and modern, effective methods for teaching it. The course also demonstrates ways how scientific thinking and hands-on activities could be implemented in the classroom. We have designed this course to provide the non-science student a confident basic understanding of physical science and modern, effective methods for teaching it. Most of topics were selected using National Science Standards and National Mathematics Standards that are addressed in grades K-8. The course focuses on helping education majors: 1) Build knowledge of scientific concepts and processes; 2) Understand the measurable attributes of objects and the units and methods of measurements; 3) Conduct data analysis (collecting, organizing, presenting scientific data, and to predict the result); 4) Use hands-on approaches to teach science; 5) Be familiar with Internet science teaching resources. Here we share our experiences and challenges we face while teaching this course.

Verner, E.; Bruhweiler, F. C.; Long, T.

2011-12-01

295

Portable EDITOR (PEDITOR): A portable image processing system. [satellite images  

NASA Technical Reports Server (NTRS)

The PEDITOR image processing system was created to be readily transferable from one type of computer system to another. While nearly identical in function and operation to its predecessor, EDITOR, PEDITOR employs additional techniques which greatly enhance its portability. These cover system structure and processing. In order to confirm the portability of the software system, two different types of computer systems running greatly differing operating systems were used as target machines. A DEC-20 computer running the TOPS-20 operating system and using a Pascal Compiler was utilized for initial code development. The remaining programmers used a Motorola Corporation 68000-based Forward Technology FT-3000 supermicrocomputer running the UNIX-based XENIX operating system and using the Silicon Valley Software Pascal compiler and the XENIX C compiler for their initial code development.

Angelici, G.; Slye, R.; Ozga, M.; Ritter, P.

1986-01-01

296

The Airborne Ocean Color Imager - System description and image processing  

NASA Technical Reports Server (NTRS)

The Airborne Ocean Color Imager was developed as an aircraft instrument to simulate the spectral and radiometric characteristics of the next generation of satellite ocean color instrumentation. Data processing programs have been developed as extensions of the Coastal Zone Color Scanner algorithms for atmospheric correction and bio-optical output products. The latter include several bio-optical algorithms for estimating phytoplankton pigment concentration, as well as one for the diffuse attenuation coefficient of the water. Additional programs have been developed to geolocate these products and remap them into a georeferenced data base, using data from the aircraft's inertial navigation system. Examples illustrate the sequential data products generated by the processing system, using data from flightlines near the mouth of the Mississippi River: from raw data to atmospherically corrected data, to bio-optical data, to geolocated data, and, finally, to georeferenced data.

Wrigley, Robert C.; Slye, Robert E.; Klooster, Steven A.; Freedman, Richard S.; Carle, Mark; Mcgregor, Lloyd F.

1992-01-01

297

Development of the SOFIA Image Processing Tool  

NASA Technical Reports Server (NTRS)

The Stratospheric Observatory for Infrared Astronomy (SOFIA) is a Boeing 747SP carrying a 2.5 meter infrared telescope capable of operating between at altitudes of between twelve and fourteen kilometers, which is above more than 99 percent of the water vapor in the atmosphere. The ability to make observations above most water vapor coupled with the ability to make observations from anywhere, anytime, make SOFIA one of the world s premiere infrared observatories. SOFIA uses three visible light CCD imagers to assist in pointing the telescope. The data from these imagers is stored in archive files as is housekeeping data, which contains information such as boresight and area of interest locations. A tool that could both extract and process data from the archive files was developed.

Adams, Alexander N.

2011-01-01

298

Teaching on Three-Dimensional Presentation Does Not Improve the Understanding of According CT Images: A Randomized Controlled Study  

Microsoft Academic Search

Background: Randomized studies have already described the advantages of three dimensional (3D) presentations in understanding complex spatial interactions. However, the clinical setting is mainly characterized by presentations of two dimensional (2D) images. Purpose: This study evaluates whether training on 3D presentation enhances the understanding of 2D images. Methods: A teaching module was used consisting of one learning part and two

Rebecca Metzler; Daniel Stein; Ralf Tetzlaff; Thomas Bruckner; Hans-Peter Meinzer; Markus W. Büchler; Martina Kadmon; Beat P. Müller-Stich; Lars Fischer

2012-01-01

299

The Effects of Image-Based Concept Mapping on the Learning Outcomes and Cognitive Processes of Mobile Learners  

ERIC Educational Resources Information Center

The purpose of this study was to investigate the effects of different teaching strategies (text-based concept mapping vs. image-based concept mapping) on the learning outcomes and cognitive processes of mobile learners. Eighty-six college freshmen enrolled in the "Local Area Network Planning and Implementation" course taught by the first author…

Yen, Jung-Chuan; Lee, Chun-Yi; Chen, I-Jung

2012-01-01

300

HYMOSS signal processing for pushbroom spectral imaging  

NASA Technical Reports Server (NTRS)

The objective of the Pushbroom Spectral Imaging Program was to develop on-focal plane electronics which compensate for detector array non-uniformities. The approach taken was to implement a simple two point calibration algorithm on focal plane which allows for offset and linear gain correction. The key on focal plane features which made this technique feasible was the use of a high quality transimpedance amplifier (TIA) and an analog-to-digital converter for each detector channel. Gain compensation is accomplished by varying the feedback capacitance of the integrate and dump TIA. Offset correction is performed by storing offsets in a special on focal plane offset register and digitally subtracting the offsets from the readout data during the multiplexing operation. A custom integrated circuit was designed, fabricated, and tested on this program which proved that nonuniformity compensated, analog-to-digital converting circuits may be used to read out infrared detectors. Irvine Sensors Corporation (ISC) successfully demonstrated the following innovative on-focal-plane functions that allow for correction of detector non-uniformities. Most of the circuit functions demonstrated on this program are finding their way onto future IC's because of their impact on reduced downstream processing, increased focal plane performance, simplified focal plane control, reduced number of dewar connections, as well as the noise immunity of a digital interface dewar. The potential commercial applications for this integrated circuit are primarily in imaging systems. These imaging systems may be used for: security monitoring systems, manufacturing process monitoring, robotics, and for spectral imaging when used in analytical instrumentation.

Ludwig, David E.

1991-01-01

301

A Cognitive Processing Capacity Model of Teaching and Studying Applied to Biology.  

ERIC Educational Resources Information Center

The cognitive processing capacity (CPC) model of teaching and studying was used to determine whether tenth grade students could improve their performance in biology. The 27 students in the experimental class were taught to study information in quantities that matched their CPC and to chunk these quantities together under a heading in a study…

Furukawa, James M.; And Others

302

Using a laboratory simulator in the teaching and study of chemical processes in estuarine systems  

Microsoft Academic Search

The teaching of Chemical Oceanography in the Faculty of Marine and Environmental Sciences of the University of Cádiz (Spain) has been improved since 1994 by the employment of a device for the laboratory simulation of estuarine mixing processes and the characterisation of the chemical behaviour of many substances that pass through an estuary. The equipment comprising the simulator is controlled

E. Garc??a-Luque; T. Ortega; J. M. Forja; A. Gómez-parra

2004-01-01

303

Understanding Reactions to Workplace Injustice through Process Theories of Motivation: A Teaching Module and Simulation  

ERIC Educational Resources Information Center

Management and organizational behavior students are often overwhelmed by the plethora of motivation theories they must master at the undergraduate level. This article offers a teaching module geared toward helping students understand how two major process theories of motivation, equity and expectancy theories and theories of organizational…

Stecher, Mary D.; Rosse, Joseph G.

2007-01-01

304

A Performer's Creative Processes: Implications for Teaching and Learning Musical Interpretation  

ERIC Educational Resources Information Center

The purpose of this study is to investigate aspects of musical interpretation and suggest guidelines for developing performance students' interpretative processes. Since musical interpretation involves basic issues concerning the nature of music, and competing concepts of "interpretation" and its teaching, an overview of these issues is given.…

Silverman, Marissa

2008-01-01

305

The Emergence of the Teaching/Learning Process in Preschoolers: Theory of Mind and Age Effect  

ERIC Educational Resources Information Center

This study analysed the gradual emergence of the teaching/learning process by examining theory of mind (ToM) acquisition and age effects in the preschool period. We observed five dyads performing a jigsaw task drawn from a previous study. Three stages were identified. In the first one, the teacher focuses on the execution of her/his own task…

Bensalah, Leila

2011-01-01

306

Teaching the Dialectic Process to Preservice Teachers in an Educational Psychology Class.  

ERIC Educational Resources Information Center

This paper describes an educational psychology class that helped develop self-reflection in preservice teachers by teaching them the dialectic process of analysis. Students explored the attitudes, beliefs, values, assumptions, and biases they as future teachers would bring with them to classroom interactions with students. As an ongoing…

Allen, James D.; Jeffers, Glenn A.

307

Three Strategies for Intensifying Student Involvement in the Teaching/Learning Process  

ERIC Educational Resources Information Center

This article describes the library media program at John Glenn Elementary School (San Antonio, Texas). The program's goal was to increase student involvement in the teaching/learning process through a library media program that would generate excitement, intensity, and commitment. The three strategies they employed to achieve this goal were: (1)…

McGuire, Patience Lea

2005-01-01

308

Metaphors in Mathematics Classrooms: Analyzing the Dynamic Process of Teaching and Learning of Graph Functions  

ERIC Educational Resources Information Center

This article presents an analysis of a phenomenon that was observed within the dynamic processes of teaching and learning to read and elaborate Cartesian graphs for functions at high-school level. Two questions were considered during this investigation: What types of metaphors does the teacher use to explain the graphic representation of functions…

Font, Vicenc; Bolite, Janete; Acevedo, Jorge

2010-01-01

309

Internet Access, Use and Sharing Levels among Students during the Teaching-Learning Process  

ERIC Educational Resources Information Center

The purpose of this study was to determine the awareness among students and levels regarding student access, use, and knowledge sharing during the teaching-learning process. The triangulation method was utilized in this study. The population of the research universe was 21,747. The student sample population was 1,292. Two different data collection…

Tutkun, Omer F.

2011-01-01

310

Mathematics Teaching and Learning as a Mediating Process: The Case of Tape Diagrams  

ERIC Educational Resources Information Center

This article examines how visual representations may mediate the teaching and learning of mathematics over time in Japanese elementary classrooms. Using the Zone of Proximal Development Mathematical Learning Model (Murata & Fuson, 2006; Fuson & Murata, 2007), the process of mediation is explicated. The tape diagram, a central visual representation…

Murata, Aki

2008-01-01

311

Real-World Experimentation Comparing Time-Sharing and Batch Processing in Teaching Computer Science.  

National Technical Information Service (NTIS)

This paper is an abbreviated version of a portion of a book-length study. The Air Force Academy conducted a large-scale experiment to test the effectiveness of time-sharing and batch processing in teaching computer science. The experimental design was cen...

H. Sackman

1973-01-01

312

Optimizing the Teaching-Learning Process Through a Linear Programming Model--Stage Increment Model.  

ERIC Educational Resources Information Center

An operations research method to optimize the teaching-learning process is introduced in this paper. In particular, a linear programing model is proposed which, unlike dynamic or control theory models, allows the computer to react to the responses of a learner in seconds or less. To satisfy the assumptions of linearity, the seemingly complicated…

Belgard, Maria R.; Min, Leo Yoon-Gee

313

A Problem-Based Learning Model for Teaching the Instructional Design Business Acquisition Process.  

ERIC Educational Resources Information Center

Outlines a conceptual framework for using a problem-based learning model for teaching the Instructional Design Business Acquisition Process. Discusses writing a response to a request for proposal, developing a working prototype, orally presenting the solution, and the impact of problem-based learning on students' perception of their confidence in…

Kapp, Karl M.; Phillips, Timothy L.; Wanner, Janice H.

2002-01-01

314

Using a Laboratory Simulator in the Teaching and Study of Chemical Processes in Estuarine Systems  

ERIC Educational Resources Information Center

The teaching of Chemical Oceanography in the Faculty of Marine and Environmental Sciences of the University of Cadiz (Spain) has been improved since 1994 by the employment of a device for the laboratory simulation of estuarine mixing processes and the characterisation of the chemical behaviour of many substances that pass through an estuary. The…

Garcia-Luque, E.; Ortega, T.; Forja, J. M.; Gomez-Parra, A.

2004-01-01

315

Teaching creativity involves both cognitive and affective learning processes organized as 3D cases on The Creative Platform  

Microsoft Academic Search

Teaching creativity involves both a cognitive and an affective learning process. Creativity can be defined as our ability to perceive and respond to stimuli in a new way. Teaching creativity therefore involves both cognitive and affective learning processes. Cognitive because our thinking is cognitive and affective because our thinking is close related to our body movements and attitude in a

S. Hansen; C. Byrge

316

CCD Architectures for Focal-Plane Image Processing  

Microsoft Academic Search

ABSTRACT Architectures,for focal-plane,image,processing,using,CCD circuits are discussed.,The choice,of architecture,depends,on imager,density,and,required,throughput.,High-density imagers,require,the reconstruction,of local neighborhoods,prior to image,processing.,Lower density,imagers,can utilize spatial parallelism,to improve,throughput.,The use of three-dimensional structures,can provide,additional real-estate for processing,circuitry.

Eric R. Fossum

317

Gasoline-ethanol (Gasohol) fuel blend spray characterization using digital imaging and image processing  

Microsoft Academic Search

This paper tries to characterize the spray of gasoline-ethanol blends using schlieren imaging technique and image processing. Five different gasoline-ethanol fuel blend rates by volume are prepared. The Image of the spray is captured using schlieren imaging technique and image processing is employed to extract macro spray characteristics- spray tip penetration and spray cone angle. Based on the extracted tip

Emishaw D. Iffa; A. K. Amirruddin; S. Shaharin Anwar; A. R. A. Aziz

2009-01-01

318

Low level image processing techniques using the pipeline image processing engine in the flight telerobotic servicer  

NASA Technical Reports Server (NTRS)

The sensory processing system for the NASA/NBS Standard Reference Model (NASREM) for telerobotic control is described. This control system architecture was adopted by NASA of the Flight Telerobotic Servicer. The control system is hierarchically designed and consists of three parallel systems: task decomposition, world modeling, and sensory processing. The Sensory Processing System is examined, and in particular the image processing hardware and software used to extract features at low levels of sensory processing for tasks representative of those envisioned for the Space Station such as assembly and maintenance are described.

Nashman, Marilyn; Chaconas, Karen J.

1988-01-01

319

MISR Browse Images: Cold Land Processes Experiment (CLPX)  

... MISR Browse Images: Cold Land Processes Experiment (CLPX) These MISR Browse images provide a ... over the region observed during the NASA Cold Land Processes Experiment (CLPX). CLPX involved ground, airborne, and satellite measurements ...

2013-04-02

320

VHDL test bench for digital image processing systems using a new image format  

Microsoft Academic Search

The design of complex electronic circuits such as image processing circuits require new specific simulation and modelling tools, in order to reduce the development time. To simulate image-processing models described in VHDL an application specific test bench is needed. In this work a VHDL test bench was designed specifically for image-processing applications. It was necessary to define a new image

A. Zuloaga; J. L. Martín; U. Bidarte; J. A. Ezquerra

321

Platform for distributed image processing and image retrieval  

NASA Astrophysics Data System (ADS)

We describe a platform for the implementation of a system for content-based image retrieval in medical applications (IRMA). To cope with the constantly evolving medical knowledge, the platform offers a flexible feature model to store and uniformly access all feature types required within a multi-step retrieval approach. A structured generation history for each feature allows the automatic identification and re-use of already computed features. The platform uses directed acyclic graphs composed of processing steps and control elements to model arbitrary retrieval algorithms. This visually intuitive, data-flow oriented representation vastly improves the interdisciplinary communication between computer scientists and physicians during the development of new retrieval algorithms. The execution of the graphs is fully automated within the platform. Each processing step is modeled as a feature transformation. Due to a high degree of system transparency, both the implementation and the evaluation of retrieval algorithms are accelerated significantly. The platform uses a client-server architecture consisting of a central database, a central job scheduler, instances of a daemon service, and clients which embed user-implemented feature ansformations. Automatically distributed batch processing and distributed feature storage enable the cost-efficient use of an existing workstation cluster.

Gueld, Mark O.; Thies, Christian J.; Fischer, Benedikt; Keysers, Daniel; Wein, Berthold B.; Lehmann, Thomas M.

2003-06-01

322

Imaging fault zones using 3D seismic image processing techniques  

NASA Astrophysics Data System (ADS)

Significant advances in structural analysis of deep water structure, salt tectonic and extensional rift basin come from the descriptions of fault system geometries imaged in 3D seismic data. However, even where seismic data are excellent, in most cases the trajectory of thrust faults is highly conjectural and still significant uncertainty exists as to the patterns of deformation that develop between the main faults segments, and even of the fault architectures themselves. Moreover structural interpretations that conventionally define faults by breaks and apparent offsets of seismic reflectors are commonly conditioned by a narrow range of theoretical models of fault behavior. For example, almost all interpretations of thrust geometries on seismic data rely on theoretical "end-member" behaviors where concepts as strain localization or multilayer mechanics are simply avoided. Yet analogue outcrop studies confirm that such descriptions are commonly unsatisfactory and incomplete. In order to fill these gaps and improve the 3D visualization of deformation in the subsurface, seismic attribute methods are developed here in conjunction with conventional mapping of reflector amplitudes (Marfurt & Chopra, 2007)). These signal processing techniques recently developed and applied especially by the oil industry use variations in the amplitude and phase of the seismic wavelet. These seismic attributes improve the signal interpretation and are calculated and applied to the entire 3D seismic dataset. In this contribution we will show 3D seismic examples of fault structures from gravity-driven deep-water thrust structures and extensional basin systems to indicate how 3D seismic image processing methods can not only build better the geometrical interpretations of the faults but also begin to map both strain and damage through amplitude/phase properties of the seismic signal. This is done by quantifying and delineating the short-range anomalies on the intensity of reflector amplitudes and collecting these into "disturbance geobodies". These seismic image processing methods represents a first efficient step toward a construction of a robust technique to investigate sub-seismic strain, mapping noisy deformed zones and displacement within subsurface geology (Dutzer et al.,2011; Iacopini et al.,2012). In all these cases, accurate fault interpretation is critical in applied geology to building a robust and reliable reservoir model, and is essential for further study of fault seal behavior, and reservoir compartmentalization. They are also fundamental for understanding how deformation localizes within sedimentary basins, including the processes associated with active seismogenetic faults and mega-thrust systems in subduction zones. Dutzer, JF, Basford., H., Purves., S. 2009, Investigating fault sealing potential through fault relative seismic volume analysis. Petroleum Geology Conference series 2010, 7:509-515; doi:10.1144/0070509 Marfurt, K.J., Chopra, S., 2007, Seismic attributes for prospect identification and reservoir characterization. SEG Geophysical development Iacopini, D., Butler, RWH. & Purves, S. (2012). 'Seismic imaging of thrust faults and structural damage: a visualization workflow for deepwater thrust belts'. First Break, vol 5, no. 30, pp. 39-46.

Iacopini, David; Butler, Rob; Purves, Steve

2013-04-01

323

Electronic speckle pattern interferometry using digital image processing techniques  

Microsoft Academic Search

An application of digital image processing techniques to electronic speckle pattern interferometry (ESPI) is described. A special digital facility with a large frame memory for processing a TV image is developed, allowing one to perform precise and flexible operations such as subtraction, summation, and level slicing. As compared to analog techniques, digital image processing techniques facilitate the generation of high

Suezou Nakadate; Toyohiko Yatagai; Hiroyoshi Saito

1980-01-01

324

Automated recognition of surface defects using digital color image processing  

Microsoft Academic Search

One of the computerized technologies for advanced infrastructure inspection methods is the application of digital image processing. Digital image processing methods have been developed for steel bridge coating inspections for the past few years. The rust percentages on steel bridge coating surfaces can be reliably computed through the use of digital image processing methods. However, previous researchers solely focused on

Sangwook Lee; Luh-Maan Chang; Miroslaw Skibniewski

2006-01-01

325

Image processing coprocessor implementation for Xilinx XC6000 series FPGAs  

Microsoft Academic Search

This paper presents an Image Processing Coprocessor implementation for XC6000 series FPGAs. The FPGA acts as a semi-autonomous abstract coprocessor carrying out image processing operational independently. This paper outlines the main structure of the image processing coprocessor in addition to its high level programming environment. The environment provides a library of very high level, parametrized architecture descriptions which are scaleable

Khaled Benkrid; K. Alotaibi; Danny Crookes; A. Bouridane; A. Benkrid

1999-01-01

326

Preparing Teachers to Teach Science: Learning Science as a Process.  

ERIC Educational Resources Information Center

Cites the lack of students' understanding and practicing of science processes as evidenced in science fair projects. Major contributors to the decline in science achievement are discussed. Author suggests teachers need experience with "sciencing" in the form of original investigative projects. Coursework designed to meet this goal is described.…

Cornell, Elizabeth A.

1985-01-01

327

Teaching MBA Statistics Online: A Pedagogically Sound Process Approach  

ERIC Educational Resources Information Center

Delivering MBA statistics in the online environment presents significant challenges to education and students alike because of varying student preparedness levels, complexity of content, difficulty in assessing learning outcomes, and faculty availability and technological expertise. In this article, the author suggests a process model that…

Grandzol, John R.

2004-01-01

328

Outcome-Led and Process-Led Teaching  

ERIC Educational Resources Information Center

The new program of study for KS3 and the proposed changes in Y11 assessment for 2012 are now demanding teachers to focus again on the processes of learning. Teachers are being told they must "allow students to select the mathematics to use", "allow students to explore connected problems" and encourage them to work with real situations. These…

Teasdale, Rebecca

2008-01-01

329

Image Processing with Wavelets and Multifractal Analysis.  

National Technical Information Service (NTIS)

Overview: Wavelet based methods: Wavelets for image representation and JPEG 2000; Non-separable wavelets; Wavelet Denoising. IFS based methods: IFS fractal basics IFS on images; IFS image compression basics and variations; Fractal denoising; Mixing IFS an...

F. Mendivil

2005-01-01

330

Digital image processing: a path to better pictures.  

PubMed

Digital image processing can be used to provide enhanced performance in scanning electron column instruments. Improved visualization, reduced specimen damage, and quantization can be achieved. The system described here provides hardware for digitization and storage of multiple images simultaneously, and multimode scan generation. System software provides easy scan control, image digitization, automatic prescale adjust on acquisition, grey scale histogram generation, grey scale compression or expansion, image filtering, smoothing, and random color assignment to grey levels. Image digitization and processing was done using the EG&G ORTEC Image Master Microanalyzer in conjunction with a JEOL 100CX TEMSCAN and a JEOL JSM 35. Examples of image processing of bright and dark field STEM images of biological specimens are shown. An example of X-ray image processing using a two-dimensional filter function to reduce image noise is also shown. PMID:6750889

Kokubo, Y; Hardy, W H

1982-01-01

331

The impact of new imaging technology on health care, research, and teaching: an international symposium.  

PubMed

The highlights are reported from the fourth international symposium on the impact of new imaging technology on health care, research, and teaching held in San Francisco, October 23-25, 1986. Ninety representatives of academic radiology and industry from 23 nations discussed modern radiology from differing perspectives dependent on the political structure of their governments and the economic status of their peoples. Keynote addresses by leading health-care administrators from government, universities, industry, and hospitals provided insightful overviews of current health service, teaching, and research issues in the United States. Three recommendations were derived from the symposium: (1) more complete and objective documentation of the impact of new technologies on the cost and outcomes of health services is urgently needed, (2) technical specifications for imaging instruments need better definition in terms of the medical problems to which they are applied, and (3) radiologists and radiologic societies in industrialized countries should support more generously the local training in radiology in underdeveloped countries. PMID:3120526

Figley, M M; Margulis, A R

1987-12-01

332

ISAR Target 2D Images Pre-processing in ATR  

Microsoft Academic Search

The recognition performance can be enhanced using the ISAR target 2D image pre-processed. The image consists of many scatters. The image with holes is disadvantageous for extracting features in automatic target recognition (ATR). An approach of ISAR target 2D image pre-processing is proposed. It contains suppressing the interferential stripes, connecting the scatters and normalizing the mass center. The smoothed image

Xinggan Zhang; Yechao Bai

2009-01-01

333

Image processing and products for the Magellan mission to Venus  

NASA Technical Reports Server (NTRS)

The Magellan mission to Venus is providing planetary scientists with massive amounts of new data about the surface geology of Venus. Digital image processing is an integral part of the ground data system that provides data products to the investigators. The mosaicking of synthetic aperture radar (SAR) image data from the spacecraft is being performed at JPL's Multimission Image Processing Laboratory (MIPL). MIPL hosts and supports the Image Data Processing Subsystem (IDPS), which was developed in a VAXcluster environment of hardware and software that includes optical disk jukeboxes and the TAE-VICAR (Transportable Applications Executive-Video Image Communication and Retrieval) system. The IDPS is being used by processing analysts of the Image Data Processing Team to produce the Magellan image data products. Various aspects of the image processing procedure are discussed.

Clark, Jerry; Alexander, Doug; Andres, Paul; Lewicki, Scott; Mcauley, Myche

1992-01-01

334

Dobutamine echocardiography: usefulness of digital image processing.  

PubMed

The present study was undertaken in order specifically to evaluate the usefulness of digital image processing so as to enhance the diagnostic power of dobutamine stress echocardiography. For this purpose 44 dobutamine echocardiographic tests, routinely performed in our echo laboratory, were analysed blindly by two observers using traditional videotape recording and digitized image acquisition. The results obtained from both observers show a trend which suggests that the traditional videotape approach provides more true-positive tests than the digitized approach (27/38 vs 23/38 and 24/38 vs 22/38 for the first and second observer, respectively). True-negative test detection was 6/6 with the videotape and 5/6 with the digitized method for both observers. As a consequence of the discrepancies observed between the two modalities, the videotape indicates that it can provide higher diagnostic accuracy than the digitized approach (72 +/- 9% vs 63 +/- 10%). The tests results concordance (positive or negative) between the two modalities of analysis was 66% for both the observers. The inter-observer agreement on the test results was 84% and 80% for the videotape analysis and the digitized analysis, respectively. On the basis of the results, we consider that digitized analysis applied to dobutamine stress echocardiography does not afford significant diagnostic advantages and should not be considered as an alternative option to traditional videotape analysis. However, it may be considered an extremely useful integrative tool since it produces the on-line image evaluation more easily and faster and allows a more practical form of stress test storage. PMID:8746911

Castini, D; Gentile, F; Ornaghi, M; Montani, E; Lippolis, A; Mangiarotti, E; Esposti, D; Cirino, D; Maggi, G C

1995-10-01

335

Statistical Calibration of the CCD Imaging Process  

Microsoft Academic Search

Charge-Coupled Device (CCD) cameras are widely used imaging sensors in computer vision systems. Many pho- tometric algorithms, such as shape from shading, color constancy, and photometric stereo, implicitly assume that the image intensity is proportional to scene radiance. The actual image measurements deviate significantly from this assumption since the transformation from scene radiance to image intensity is non-linear and is

Yanghai Tsin; Visvanathan Ramesh; Takeo Kanade

2001-01-01

336

A fusion method for visible and infrared images based on contrast pyramid with teaching learning based optimization  

NASA Astrophysics Data System (ADS)

This paper proposes a novel image fusion scheme based on contrast pyramid (CP) with teaching learning based optimization (TLBO) for visible and infrared images under different spectrum of complicated scene. Firstly, CP decomposition is employed into every level of each original image. Then, we introduce TLBO to optimizing fusion coefficients, which will be changed under teaching phase and learner phase of TLBO, so that the weighted coefficients can be automatically adjusted according to fitness function, namely the evaluation standards of image quality. At last, obtain fusion results by the inverse transformation of CP. Compared with existing methods, experimental results show that our method is effective and the fused images are more suitable for further human visual or machine perception.

Jin, Haiyan; Wang, Yanyan

2014-05-01

337

Methods for processing and imaging marsh foraminifera  

USGS Publications Warehouse

This study is part of a larger U.S. Geological Survey (USGS) project to characterize the physical conditions of wetlands in southwestern Louisiana. Within these wetlands, groups of benthic foraminifera-shelled amoeboid protists living near or on the sea floor-can be used as agents to measure land subsidence, relative sea-level rise, and storm impact. In the Mississippi River Delta region, intertidal-marsh foraminiferal assemblages and biofacies were established in studies that pre-date the 1970s, with a very limited number of more recent studies. This fact sheet outlines this project's improved methods, handling, and modified preparations for the use of Scanning Electron Microscope (SEM) imaging of these foraminifera. The objective is to identify marsh foraminifera to the taxonomic species level by using improved processing methods and SEM imaging for morphological characterization in order to evaluate changes in distribution and frequency relative to other environmental variables. The majority of benthic marsh foraminifera consists of agglutinated forms, which can be more delicate than porcelaneous forms. Agglutinated tests (shells) are made of particles such as sand grains or silt and clay material, whereas porcelaneous tests consist of calcite.

Dreher, Chandra A.; Flocks, James G.

2011-01-01

338

A statistical mechanics approach to digital image processing: Image enhancement  

Microsoft Academic Search

An algorithm for the enhancement of digital images is described. The algorithm is based upon the analogy that may exist between the description of a macroscopic system composed of many particles, and a digital image composed of many pixels. The analogy assumes that the intensity in a digital image fluctuates, so that the algorithm takes into account that fluctuations must

R. Aldave-Matar; M. Ley-Koo

1996-01-01

339

Teaching undergraduates the process of peer review: learning by doing  

NSDL National Science Digital Library

An active approach allowed undergraduates in Health Sciences to learn the dynamics of peer review at first hand. A four-stage process was used. In stage 1, students formed self-selected groups to explore specific issues. In stage 2, each group posted their interim reports online on a specific date. Each student read all the other reports and prepared detailed critiques. In stage 3, each report was discussed at sessions where the lead discussant was selected at random. All students participated in the peer review process. The written critiques were collated and returned to each group, who were asked to resubmit their revised reports within 2 wk. In stage 4, final submissions accompanied by rebuttals were graded. Student responses to a questionnaire were highly positive. They recognized the individual steps in the standard peer review, appreciated the complexities involved, and got a first-hand experience of some of the inherent variabilities involved. The absence of formal presentations and the opportunity to read each other's reports permitted them to study issues in greater depth.

2010-09-01

340

Noticing Children's Learning Processes--Teachers Jointly Reflect on Their Own Classroom Interaction for Improving Mathematics Teaching  

ERIC Educational Resources Information Center

One could focus on many different aspects of improving the quality of mathematics teaching. For a better understanding of children's mathematical learning processes or teaching and learning in general, reflection on and analysis of concrete classroom situations are of major importance. On the basis of experiences gained in a collaborative research…

Scherer, Petra; Steinbring, Heinz

2006-01-01

341

Teaching Introductory Geology by a Paradigm, Process and Product Approach  

NASA Astrophysics Data System (ADS)

Students in introductory geology courses can easily become lost in the minutiae of terms and seemingly random ideas and theories. One way to avoid this and provide a holistic picture of each major subject area in a beginning course is to introduce, at the start of each section, the ruling paradigm, the processes, and resultant products. By use of these three Ps: paradigm, processes, and products, students have a reasonably complete picture of the subject area. If they knew nothing more than this simple construct, they would have an excellent perspective of the subject area. This provides a jumping off point for the instructor to develop the details. The three Ps can make course construction much more straightforward and complete. Students benefit since they have a clearer idea of what the subject is about and its importance. Retention may be improved and carryover to advanced courses may be aided. For faculty, the use of these three P's makes organizing a course more straightforward. Additionally, the instructor benefits include: 1. The main points are clearly stated, thus avoiding the problem of not covering the essential concepts. 2. The course topics hold together, pedagogically. There is significant opportunity for continuity of thought. 3. An outline is developed that is easily analyzed for holes or omissions. 4. A course emerges with a balance of topics, permitting appropriate time to be devoted to significant subject matter. 5. If a course is shared between faculty or passes from one faculty to another by semester or quarter, there is greater assurance that topics and concepts everyone agrees on can be adequately covered. 6. There is less guesswork involved in planning a course. New faculty have an approach that will make sense and allow them to feel less awash and more focused. In summary, taking time to construct a course utilizing the important paradigms, processes, and products can provide significant benefits to the instructor and the student. Material can be presented in a more coherent manner and allow students the opportunity to grasp essential concepts from the very beginning. There are fewer potential surprises and greater likelihood that key ideas can be retained, as opposed to retaining isolated fragments of information. Illustrations from over a decade of use in an introductory Physical and Historical Geology course will be presented.

Reams, M.

2008-12-01

342

LaboImage: a workstation environment for research in image processing and analysis  

Microsoft Academic Search

Numerous images are produced daily in biomedical research. In order to extract relevantand useful results, various processing and analysis steps are mandatory. The present paperdescribes a new, powerful and user-friendly image analysis system: LaboImage. In addition tostandard image processing modules, LaboImage also contains various specialized tools. Thesemultiple processing modules and tools are first introduced. A 1-D gel analysis method is

Alain Jacot-descombes; Krassimir Todorov; Denis F. Hochstrasser; Christian Pellegrini; Thierry Pun

1991-01-01

343

A web-based 3D medical image collaborative processing system with videoconference  

NASA Astrophysics Data System (ADS)

Three dimension medical images have been playing an irreplaceable role in realms of medical treatment, teaching, and research. However, collaborative processing and visualization of 3D medical images on Internet is still one of the biggest challenges to support these activities. Consequently, we present a new application approach for web-based synchronized collaborative processing and visualization of 3D medical Images. Meanwhile, a web-based videoconference function is provided to enhance the performance of the whole system. All the functions of the system can be available with common Web-browsers conveniently, without any extra requirement of client installation. In the end, this paper evaluates the prototype system using 3D medical data sets, which demonstrates the good performance of our system.

Luo, Sanbi; Han, Jun; Huang, Yonggang

2013-07-01

344

Morphological image processing for locating minelike objects from side-scan sonar images  

Microsoft Academic Search

A morphological image-processing algorithm was developed to facilitate the rapid identification of bottom minelike objects in side scan sonar acoustic backscatter images. Because large numbers of images are being processed, the emphasis is on rapid computation. The algorithm achieves computational efficiency by dividing the image into bins of a pre-chosen size and performing a binary opening operation for each bin

Gordon L. Swartzman; William C. Kooiman

1999-01-01

345

A Log-polar Image Processing System on a Chip  

Microsoft Academic Search

This paper deals with the implementation, in a high density reprogrammable device, of a complete log-polar image processing system. The log-polar vision reduces the amount of data to be processed and simplifies several vision algorithms, making it possible the implementation of a complete processing system on a single chip. The image processing system has a conversion module from cartesian to

Fernando Pardo; Jose A. Boluda; Julio C. Sos

346

Image processing for IMRT QA dosimetry.  

PubMed

We have automated the determination of the placement location of the dosimetry ion chamber within intensity-modulated radiotherapy (IMRT) fields, as part of streamlining the entire IMRT quality assurance process. This paper describes the mathematical image-processing techniques to arrive at the appropriate measurement locations within the planar dose maps of the IMRT fields. A specific spot within the found region is identified based on its flatness, radiation magnitude, location, area, and the avoidance of the interleaf spaces. The techniques used include applying a Laplacian, dilation, erosion, region identification, and measurement point selection based on three parameters: the size of the erosion operator, the gradient, and the importance of the area of a region versus its magnitude. These three parameters are adjustable by the user. However, the first one requires tweaking in extremely rare occasions, the gradient requires rare adjustments, and the last parameter needs occasional fine-tuning. This algorithm has been tested in over 50 cases. In about 5% of cases, the algorithm does not find a measurement point due to the extremely steep and narrow regions within the fluence maps. In such cases, manual selection of a point is allowed by our code, which is also difficult to ascertain, since the fluence map does not yield itself to an appropriate measurement point selection. PMID:16421497

Zaini, Mehran R; Forest, Gary J; Loshek, David D

2005-01-01

347

Edge feature extraction based on digital image processing techniques  

Microsoft Academic Search

Edge detection is a basic and important subject in computer vision and image processing. In this paper we discuss several digital image processing techniques applied in edge feature extraction. Firstly, wavelet transform is used to remove noises from the image collected. Secondly, some edge detection operators such as Differential edge detection, Log edge detection, Canny edge detection and Binary morphology

Feng-ying Cui; Li-jun Zou; Bei Song

2008-01-01

348

Face and eye tracking algorithm based on digital image processing  

Microsoft Academic Search

A non-invasive interface to track eye position using digital image processing techniques is under development. Information about head and eye position is obtained from digital images. The objective is to develop an interface to detect eye position based only on digital image processing algorithms, free of electrodes or other electronic devices. We propose a method for eye tracking built into

CLAUDIO A. PEREZ; ALVARO PALMA; CARLOS A. HOLZMANN; C. Pena

2001-01-01

349

Poisson Point Processes: Imaging, Tracking, and Sensing.  

National Technical Information Service (NTIS)

Multitarget tracking intensity filters are closely related to imaging problems, especially PET imaging. The intensity filter is obtained by three different methods. One is a Bayesian derivation involving target prediction and information updating. The sec...

R. L. Streit

2010-01-01

350

Image Processing in the Human Visual System.  

National Technical Information Service (NTIS)

This work extends the multiplicative visual model to include image texture as suggested by previous experiments linking a low resolution Fourier analysis with neurons in certain parts of the visual cortex. The new model takes image texture into account in...

B. Baxter

1975-01-01

351

Processing of Image Data by Integrated Circuits  

NASA Technical Reports Server (NTRS)

Sensors combined with logic and memory circuitry. Cross-correlation of two inputs accomplished by transversal filter. Position of image taken to point where image and template data yield maximum value correlation function. Circuit used for controlling robots, medical-image analysis, automatic vehicle guidance, and precise pointing of scientific cameras.

Armstrong, R. W.

1985-01-01

352

Image reversal trilayer materials and processing  

Microsoft Academic Search

Image reversal trilayer (IRT) combines three lithographic patterning enhancement approaches: image reversal, spin on hard masks, and shrink for recess types of features. With IRT, photoresist imaging is done directly on top of the carbon underlayer. Thick IRT-Carbon Hard Masks (CHM) films provide effective antireflection with high NA lithography and are more etch resistant than common photoresist. IRT-Silicon Hard Masks

David J. Abdallah; Kazunori Kurosawa; Elizabeth Wolfer; Victor Monreal; M. Dalil Rahman; Dongkwan Lee; Mark Neisser; Ralph R. Dammel

2009-01-01

353

Image processing of underwater multispectral imagery  

Microsoft Academic Search

Capturing in situ fluorescence images of marine organisms presents many technical challenges. The effects of the medium, as well as the particles and organisms within it, are intermixed with the desired signal. Methods for extracting and preparing the imagery for analysis are discussed in reference to a novel underwater imaging system called the low-light-level underwater multispectral imaging system (LUMIS). The

David G. Zawada

2003-01-01

354

Query Processing Issues in Image (Multimedia) Databases  

Microsoft Academic Search

Multimedia databases have attracted academic and in- dustrial interest, and systems such as QBIC (Content Based Image Retrieval system from IBM) have been released. Such systems are essential to effectively and efficiently use the existing large collections of image data in the modern com- puting environment. The aim of such systems is to enable retrieval of images based on their

Surya Nepal; M. V. Ramakrishna

1999-01-01

355

Viewpoints on Medical Image Processing: From Science to Application  

PubMed Central

Medical image processing provides core innovation for medical imaging. This paper is focused on recent developments from science to applications analyzing the past fifteen years of history of the proceedings of the German annual meeting on medical image processing (BVM). Furthermore, some members of the program committee present their personal points of views: (i) multi-modality for imaging and diagnosis, (ii) analysis of diffusion-weighted imaging, (iii) model-based image analysis, (iv) registration of section images, (v) from images to information in digital endoscopy, and (vi) virtual reality and robotics. Medical imaging and medical image computing is seen as field of rapid development with clear trends to integrated applications in diagnostics, treatment planning and treatment.

Deserno (ne Lehmann), Thomas M.; Handels, Heinz; Maier-Hein (ne Fritzsche), Klaus H.; Mersmann, Sven; Palm, Christoph; Tolxdorff, Thomas; Wagenknecht, Gudrun; Wittenberg, Thomas

2013-01-01

356

A CMOS vision chip with SIMD processing element array for 1 ms image processing  

Microsoft Academic Search

Conventional image processing systems use a video signal as a transmission signal between an image sensor and image processor. The video rate, however, is not fast enough for some applications such as visual feedback for robot control, automobiles, gesture recognition for human interfaces, high speed visual inspection, microscope image processing, and so on. For such applications, the video signal, which

M. Ishikawa; K. Ogawa; T. Komuro; I. Ishii

1999-01-01

357

Two satellite image sets for the training and validation of image processing systems for defense applications  

NASA Astrophysics Data System (ADS)

Many image processing algorithms utilize the discrete wavelet transform (DWT) to provide efficient compression and near-perfect reconstruction of image data. Defense applications often require the transmission of data at high levels of compression over noisy channels. In recent years, evolutionary algorithms (EAs) have been utilized to optimize image transform filters that outperform standard wavelets for bandwidth-constrained compression of satellite images. The optimization of these filters requires the use of training images appropriately chosen for the image processing system's intended applications. This paper presents two robust sets of fifty images each intended for the training and validation of satellite and unmanned aerial vehicle (UAV) reconnaissance image processing algorithms. Each set consists of a diverse range of subjects consisting of cities, airports, military bases, and landmarks representative of the types of images that may be captured during reconnaissance missions. Optimized algorithms may be "overtrained" for a specific problem instance and thus exhibit poor performance over a general set of data. To reduce the risk of overtraining an image filter, we evaluate the suitability of each image as a training image. After evolving filters using each image, we assess the average compression performance of each filter across the entire set of images. We thus identify a small subset of images from each set that provide strong performance as training images for the image transform optimization problem. These images will also provide a suitable platform for the development of other algorithms for defense applications. The images are available upon request from the contact author.

Peterson, Michael R.; Aldridge, Shawn; Herzog, Britny; Moore, Frank

2010-04-01

358

MIVS Image Processing System (MIPS) for assisting in the optical surveillance data review process.  

National Technical Information Service (NTIS)

The MIVS (Modular Integrated Video System) Image Processing System (MIPS) is designed to review MIVS surveillance data automatically and identify IAEA defined objects of safeguards interest. To achieve this, MIPS uses both digital image processing and neu...

R. D. Horton

1990-01-01

359

Comparing the teaching-learning process with and without the use of computerized technological resources.  

PubMed

Computerized technological resources have become essential in education, particularly for teaching topics that require the performance of specific tasks. These resources can effectively help the execution of such tasks and the teaching-learning process itself. After the development of a Web site on the topic of nursing staff scheduling, this study aimed at comparing the development of students involved in the teaching-learning process of the previously mentioned topic, with and without the use of computer technology. Two random groups of undergraduate nursing students from a public university in São Paulo state, Brazil, were organized: a case group (used the Web site) and a control group (did not use the Web site). Data were collected from 2003 to 2005 after approval by the Research Ethics Committee. Results showed no significant difference in motivation or knowledge acquisition. A similar performance for the two groups was also verified. Other aspects observed were difficulty in doing the nursing staff scheduling exercise and the students' acknowledgment of the topic's importance for their training and professional lives; easy access was considered to be a positive aspect for maintaining the Web site. PMID:21701277

Juliani, Carmen Maria Casquel Monti; Corrente, José Eduardo; Dell'Acqua, Magda Cristina Queiroz

2011-06-01

360

Comparing the teaching-learning process with and without the use of computerized technological resources.  

PubMed

Computerized technological resources have become essential in education, particularly for teaching topics that require the performance of specific tasks. These resources can effectively help the execution of such tasks and the teaching-learning process itself. After the development of a Web site on the topic of nursing staff scheduling, this study aimed at comparing the development of students involved in the teaching-learning process of the previously mentioned topic, with and without the use of computer technology. Two random groups of undergraduate nursing students from a public university in São Paulo state, Brazil, were organized: a case group (used the Web site) and a control group (did not use the Web site). Data were collected from 2003 to 2005 after approval by the Research Ethics Committee. Results showed no significant difference in motivation or knowledge acquisition. A similar performance for the two groups was also verified. Other aspects observed were difficulty in doing the nursing staff scheduling exercise and the students' acknowledgment of the topic's importance for their training and professional lives; easy access was considered to be a positive aspect for maintaining the Web site. PMID:20978437

Juliani, Carmen Maria Casquel Monti; Corrente, José Eduardo; Dell'Acqua, Magda Cristina Queiroz

2011-04-01

361

The Study of Image Processing Method for AIDS PA Test  

NASA Astrophysics Data System (ADS)

At present, the main test technique of AIDS is PA in China. Because the judgment of PA test image is still depending on operator, the error ration is high. To resolve this problem, we present a new technique of image processing, which first process many samples and get the data including coordinate of center and the rang of kinds images; then we can segment the image with the data; at last, the result is exported after data was judgment. This technique is simple and veracious; and it also turns out to be suitable for the processing and analyzing of other infectious diseases' PA test image.

Zhang, H. J.; Wang, Q. G.

2006-10-01

362

Viking image processing. [digital stereo imagery and computer mosaicking  

NASA Technical Reports Server (NTRS)

The paper discusses the camera systems capable of recording black and white and color imagery developed for the Viking Lander imaging experiment. Each Viking Lander image consisted of a matrix of numbers with 512 rows and an arbitrary number of columns up to a maximum of about 9,000. Various techniques were used in the processing of the Viking Lander images, including: (1) digital geometric transformation, (2) the processing of stereo imagery to produce three-dimensional terrain maps, and (3) computer mosaicking of distinct processed images. A series of Viking Lander images is included.

Green, W. B.

1977-01-01

363

Automating image processing for scientific data analysis of a large image database.  

NASA Astrophysics Data System (ADS)

Describes the Multimission VICAR Planner (MVP): an AI planning system which uses knowledge about image processing steps and their requirements to construct executable image processing scripts to support high-level science requests made to the Jet Propulsion Laboratory (JPL) Multimission Image Processing Subsystem (MIPS). This article describes a general AI planning approach to automation and application of the approach to a specific area of image processing for planetary science applications involving radiometric correction, color triplet reconstruction, and mosaicing in which the MVP system significantly reduces the amount of effort required by image processing experts to fill a typical request.

Chien, S. A.; Mortensen, H. B.

1996-08-01

364

VLSI implementations of image and video multimedia processing systems  

Microsoft Academic Search

An overview of very large scale integrated (VLSI) implementations of multimedia processing systems is given with particular emphasis on architectures for image and video processing. Alternative design approaches are discussed for dedicated image and video processing circuits and for programmable multimedia processors. Current design examples of dedicated and programmable architectures are reviewed, and the techniques employed to improve the performance

Peter Pirsch; Hans-Joachim Stolberg

1998-01-01

365

Gamut-adaptive correction in color image processing  

Microsoft Academic Search

In color image processing, an image is usually processed in a color space consisting of luminance and chrominance components. The processed result is then converted to the RGB color space for display. However, a straightforward color space conversion can cause color distortion due to gamut difference between the two color spaces. In order to alleviate this gamut problem, we propose

Yoonsung Bae; Jae Ho Jang; Jong Beom Ra

2010-01-01

366

High Speed Terahertz Pulse Imaging in the Reflection Geometry and Image Quality Enhancement by Digital Image Processing  

NASA Astrophysics Data System (ADS)

We describe the formation and enhancement of two dimensional pulsed terahertz (THz) images obtained in the reflection geometry with a high-speed optical delay line. Two test objects are imaged and analyzed with respect to material information and concealed structure. Clear THz images were obtained with various imaging modes and were compared with the X-ray images. The THz image of a sample revealed material features that the X-ray image cannot distinguish. We could enhance the THz image quality using various image processing techniques, such as edge detection, de-noising, high-pass filtering, and wavelet filtering.

Shon, Chae-Hwa; Chong, Won-Yong; Jeon, Seok-Gy; Kim, Geun-Ju; Kim, Jung-Il; Jin, Yun-Sik

2008-01-01

367

GStreamer as a framework for image processing applications in image fusion  

NASA Astrophysics Data System (ADS)

Multiple source band image fusion can sometimes be a multi-step process that consists of several intermediate image processing steps. Typically, each of these steps is required to be in a particular arrangement in order to produce a unique output image. GStreamer is an open source, cross platform multimedia framework, and using this framework, engineers at NVESD have produced a software package that allows for real time manipulation of processing steps for rapid prototyping in image fusion.

Burks, Stephen D.; Doe, Joshua M.

2011-05-01

368

The management of corporate image design process  

Microsoft Academic Search

Taking numerous enterprise image design cycle confusion in the present China as a breach, the author proposed that in the enterprise image design, the idea identity system as the command, following MI strictly (mind identity)-BI (behavior identity)-VI (visual identity) design cycle; And further pointed out: In MI, in VI, BI three large-scale system respective construction, should take ¿the image¿ as

Shuxia Chen; Zheng Yang

2008-01-01

369

Multimodal microscopy by digital image processing  

Microsoft Academic Search

Abstract { A matching algorithm is proposed for aligning microscope im-ages obtained using di erent modalities, making use of cross-correlations of outputs from Prewitt's edge lter. Bright eld, phase contrast and dif-ferential interference contrast microscope images of algal and bacterial cells from an experimental, high-rate algal pond are used for illustra-tion. The information content of multimodal images is explored using

C. A. Glasbey; N. J. Martin

1996-01-01

370

Optimizing signal and image processing applications using Intel libraries  

NASA Astrophysics Data System (ADS)

This paper presents optimized signal and image processing libraries from Intel Corporation. Intel Performance Primitives (IPP) is a low-level signal and image processing library developed by Intel Corporation to optimize code on Intel processors. Open Computer Vision library (OpenCV) is a high-level library dedicated to computer vision tasks. This article describes the use of both libraries to build flexible and efficient signal and image processing applications.

Landré, Jérôme; Truchetet, Frédéric

2007-05-01

371

Image-Processing Software For A Hypercube Computer  

NASA Technical Reports Server (NTRS)

Concurrent Image Processing Executive (CIPE) is software system intended to develop and use image-processing application programs on concurrent computing environment. Designed to shield programmer from complexities of concurrent-system architecture, it provides interactive image-processing environment for end user. CIPE utilizes architectural characteristics of particular concurrent system to maximize efficiency while preserving architectural independence from user and programmer. CIPE runs on Mark-IIIfp 8-node hypercube computer and associated SUN-4 host computer.

Lee, Meemong; Mazer, Alan S.; Groom, Steven L.; Williams, Winifred I.

1992-01-01

372

On digital image processing technology and application in geometric measure  

NASA Astrophysics Data System (ADS)

Digital image processing technique is an emerging science that emerging with the development of semiconductor integrated circuit technology and computer science technology since the 1960s.The article introduces the digital image processing technique and principle during measuring compared with the traditional optical measurement method. It takes geometric measure as an example and introduced the development tendency of digital image processing technology from the perspective of technology application.

Yuan, Jiugen; Xing, Ruonan; Liao, Na

2014-04-01

373

Reducing DRAM Image Data Access Energy Consumption in Video Processing  

Microsoft Academic Search

This paper presents domain-specific techniques to reduce DRAM energy consumption for image data access in video processing. In mobile devices, video processing is one of the most energy-hungry tasks, and DRAM image data access energy consumption becomes increasingly dominant in overall video processing system energy consumption. Hence, it is highly desirable to develop domain-specific techniques that can exploit unique image

Yiran Li; Tong Zhang

2012-01-01

374

Cardiovascular Imaging and Image Processing: Theory and Practice - 1975  

NASA Technical Reports Server (NTRS)

Ultrasonography was examined in regard to the developmental highlights and present applicatons of cardiac ultrasound. Doppler ultrasonic techniques and the technology of miniature acoustic element arrays were reported. X-ray angiography was discussed with special considerations on quantitative three dimensional dynamic imaging of structure and function of the cardiopulmonary and circulatory systems in all regions of the body. Nuclear cardiography and scintigraphy, three--dimensional imaging of the myocardium with isotopes, and the commercialization of the echocardioscope were studied.

Harrison, Donald C. (editor); Sandler, Harold (editor); Miller, Harry A. (editor); Hood, Manley J. (Editor); Purser, Paul E. (Editor); Schmidt, Gene (Editor)

1975-01-01

375

An Image Processing Algorithm Based On FMAT  

NASA Technical Reports Server (NTRS)

Information deleted in ways minimizing adverse effects on reconstructed images. New grey-scale generalization of medial axis transformation (MAT), called FMAT (short for Fuzzy MAT) proposed. Formulated by making natural extension to fuzzy-set theory of all definitions and conditions (e.g., characteristic function of disk, subset condition of disk, and redundancy checking) used in defining MAT of crisp set. Does not need image to have any kind of priori segmentation, and allows medial axis (and skeleton) to be fuzzy subset of input image. Resulting FMAT (consisting of maximal fuzzy disks) capable of reconstructing exactly original image.

Wang, Lui; Pal, Sankar K.

1995-01-01

376

Image processing methods for visual prostheses based on DSP  

NASA Astrophysics Data System (ADS)

Visual prostheses for extreme vision impairment have come closer to reality during these few years. The task of this research has been to design exoteric devices and study image processing algorithms and methods for different complexity images. We have developed a real-time system capable of image capture and processing to obtain most available and important image features for recognition and simulation experiment based on DSP (Digital Signal Processor). Beyond developing hardware system, we introduce algorithms such as resolution reduction, information extraction, dilation and erosion, square (circular) pixelization and Gaussian pixelization. And we classify images with different stages according to different complexity such as simple images, medium complex images, complex images. As a result, this paper will get the needed signal for transmitting to electrode array and images for simulation experiment.

Liu, Huwei; Zhao, Ying; Tian, Yukun; Ren, Qiushi; Chai, Xinyu

2008-12-01

377

Measurement of leaf area index using image-processing technology  

NASA Astrophysics Data System (ADS)

Leaf Area Index (LAI), as a fundamental parameter to evaluate the physiological condition of plants, was calculated by image processing based on machine vision technology. The measurement system hardware consisted primarily of the MS3100 3CCD camera, the image grabber card, a desktop computer and the acquired images were processed by Matlab and ENVI. After acquiring the 3 images by the 3CCD camera of Green, Red and NIR channels, the NIR image was considered more effective in separating the soil background for its higher contrast value. Thus, it was selected for image processing to calculate the leaf area index (LAI). The transect method was applied to obtain the threshold 50 in the binary image conversion and the soil background was thus eliminated as a result that most of its reflectance in the image was under 50. Then the 'imerode'-'imdilate' operation in the image processing box of Matlab was used to remove the left crop stem noises, including those small weeds in the binary image background. Consequently, the LAI of the acquired NIR image was calculated as 0.523 by dividing the total image pixel amount by that of the black pixels in the binary image.

Qiu, Zhengjun; Fang, Hui; Zhang, Yun; He, Yong

2005-11-01

378

SIGNAL PROCESSING FOR TARGET MOTION ESTIMATION AND IMAGE FORMATION IN RADAR IMAGING OF MOVING TARGETS  

Microsoft Academic Search

Radar imaging of moving targets is often called ISAR (In- verse Synthetic Aperture Radar.) Imaging of moving targets generally consists of two separate tasks: Estimation and cor- rection of target motion, and the explicit image formation. Both tasks must be implemented with great care, as it is the coherent processing of the received radar signal phase that makes imaging possible.

Trygve Sparr

2006-01-01

379

Linear current mode image sensor with focal plane spatial image processing  

Microsoft Academic Search

Linear current mode CMOS image sensor that performs spatial convolution during pixel readout using low power analog circuitry is presented. The image sensor has 128 by 109 pixel array, digital scanning registers, pixel selection circuitry, and digitally programmable analog processing unit. An intensity image in parallel with two convolved images is provided outside the chip at 60 frames per second.

Raphael Njuguna; Viktor Gruev

2010-01-01

380

Automatic image processing in radioscopic testing  

Microsoft Academic Search

The paper deals with the geometric characterization of a circumferential weld bead by radioscopy. Weld control can only be performed by tangential irradiation. The series of images obtained for one rotation of the welded component is then strongly degraded. The inverse problem is solved using a new image segmentation method, based on an ``edge and area'' combined approach. The edge

C. Gueudre; J. Moysan; G. Corneloup

2001-01-01

381

Image processing for magnetic-resonance elastography  

Microsoft Academic Search

A newly developed magnetic resonance imaging technique can directly visualize propagating acoustic strain waves in tissue-like materials. By estimating the local wavelength of the acoustic wave pattern, quantitative values of shear modulus can be calculated and images generated that depict tissue elasticity or stiffness. Since tumors are significantly stiffer than normal tissue (the basis of their detection by palpation), this

Armando Manduca; R. Muthupillai; P. J. Rossman; James F. Greenleaf; Richard L. Ehman

1996-01-01

382

Infrared image processing and data analysis  

Microsoft Academic Search

Infrared thermography in nondestructive testing provides images (thermograms) in which zones of interest (defects) appear sometimes as subtle signatures. In this context, raw images are not often appropriate since most will be missed. In some other cases, what is needed is a quantitative analysis such as for defect detection and characterization. In this paper, presentation is made of various methods

C. Ibarra-Castanedo; D. González; M. Klein; M. Pilla; S. Vallerand; X. Maldague

2004-01-01

383

[A computer processing system for bronchoscopes images].  

PubMed

A new equipment of a computer multimedia system combined with a bronchoscope is presented here, which is able to provide active images with a high definition, image capture, synchronized video recording and playback during bronchoscopy. Its operation is easy and its quality is reliable. It is an advanced product for endoscopies and is worth while to be applied to clinical application. PMID:16104324

Liu, Miao-fang; Chen, Rong-chang; Xu, Jun; Li, Shi-yue; Wang, Gui-qian; Zhong, Nan-shan

2002-11-01

384

IMAGE PROCESSING FOR ROAD SIGNS INVENTORY  

Microsoft Academic Search

In this paper a detection road sign system, based on the analysis of colour images, is presented. This system aims at recovering the images regions that have colours similar to those present in road signs (red, white, black, blue). For each colour and inside adequate colour space, heuristic threshold decision are identified. Dynamic thresholds don't suffer from the illumination change

385

Experiments with recursive estimation in astronomical image processing  

NASA Technical Reports Server (NTRS)

Recursive estimation concepts were applied to image enhancement problems since the 70's. However, very few applications in the particular area of astronomical image processing are known. These concepts were derived, for 2-dimensional images, from the well-known theory of Kalman filtering in one dimension. The historic reasons for application of these techniques to digital images are related to the images' scanned nature, in which the temporal output of a scanner device can be processed on-line by techniques borrowed directly from 1-dimensional recursive signal analysis. However, recursive estimation has particular properties that make it attractive even in modern days, when big computer memories make the full scanned image available to the processor at any given time. One particularly important aspect is the ability of recursive techniques to deal with non-stationary phenomena, that is, phenomena which have their statistical properties variable in time (or position in a 2-D image). Many image processing methods make underlying stationary assumptions either for the stochastic field being imaged, for the imaging system properties, or both. They will underperform, or even fail, when applied to images that deviate significantly from stationarity. Recursive methods, on the contrary, make it feasible to perform adaptive processing, that is, to process the image by a processor with properties tuned to the image's local statistical properties. Recursive estimation can be used to build estimates of images degraded by such phenomena as noise and blur. We show examples of recursive adaptive processing of astronomical images, using several local statistical properties to drive the adaptive processor, as average signal intensity, signal-to-noise and autocorrelation function. Software was developed under IRAF, and as such will be made available to interested users.

Busko, I.

1992-01-01

386

APPLEPIPS /Apple Personal Image Processing System/ - An interactive digital image processing system for the Apple II microcomputer  

NASA Technical Reports Server (NTRS)

Recent developments related to microprocessor-based personal computers have made low-cost digital image processing systems a reality. Image analysis systems built around these microcomputers provide color image displays for images as large as 256 by 240 pixels in sixteen colors. Descriptive statistics can be computed for portions of an image, and supervised image classification can be obtained. The systems support Basic, Fortran, Pascal, and assembler language. A description is provided of a system which is representative of the new microprocessor-based image processing systems currently on the market. While small systems may never be truly independent of larger mainframes, because they lack 9-track tape drives, the independent processing power of the microcomputers will help alleviate some of the turn-around time problems associated with image analysis and display on the larger multiuser systems.

Masuoka, E.; Rose, J.; Quattromani, M.

1981-01-01

387

Sparse inverse solution methods for signal and image processing applications  

Microsoft Academic Search

This paper addresses image and signal processing problems where the result most consistent with prior knowledge is the minimum order, or “maximally sparse” solution. These problems arise in such diverse areas as astronomical star image deblurring, neuromagnetic image reconstruction, seismic deconvolution, and thinned array beamformer design. An optimization theoretic formulation for sparse solutions is presented, and its relationship to the

B. D. Jeffs

1998-01-01

388

SUSAN - A New Approach to Low Level Image Processing  

Microsoft Academic Search

This paper describes a new approach to low level image processing; in particular, edge and corner detection and structure preserving noise reduction. Non-linear filtering is used to define which parts of the image are closely related to each individual pixel; each pixel has associated with it a local image region which is of similar brightness to that pixel. The new

Stephen M. Smith; J. Michael Brady; Stephen M. Smith

1997-01-01

389

Radar image processing for ship-traffic control  

Microsoft Academic Search

An automatic target recognition (ATR) system performs automatic target acquisition, identification and tracking by processing a sequence of complex images. Since radar systems can produce high-resolution images during day or night and for all weather conditions, sequences of radar images can be used by an efficient ATR system for sea traffic control. In this paper, a system for the automatic

Alessandro Mecocci; Giuliano Benelli; Andrea Garzelli; Sebastiano Bottalico

1995-01-01

390

Experiences with digital processing of images at INPE  

NASA Technical Reports Server (NTRS)

Four different research experiments with digital image processing at INPE will be described: (1) edge detection by hypothesis testing; (2) image interpolation by finite impulse response filters; (3) spatial feature extraction methods in multispectral classification; and (4) translational image registration by sequential tests of hypotheses.

Mascarenhas, N. D. A. (principal investigator)

1984-01-01

391

PHOTOGRAMMETRIC PROCESSING OF LOW ALTITUDE IMAGE SEQUENCES BY UNMANNED AIRSHIP  

Microsoft Academic Search

Low altitude aerial image sequences have the advantages of high overlap, multi viewing and very high ground resolution. These kinds of images can be used in various applications that need high precision or fine texture. This paper mainly focuses on the photogrammetric processing of low altitude image sequences acquired by unmanned airship, which automatically flies according to the predefined flight

Yongjun Zhang

392

Sliding mean edge estimation. [in digital image processing  

NASA Technical Reports Server (NTRS)

A method for determining the locations of the major edges of objects in digital images is presented. The method is based on an algorithm utilizing maximum likelihood concepts. An image line-scan interval is processed to determine if an edge exists within the interval and its location. The proposed algorithm has demonstrated good results even in noisy images.

Ford, G. E.

1978-01-01

393

A Macroscopic and Microscopic Biomedical Image Processing System  

PubMed Central

This paper summarizes the current status of a biomedical image processing system being developed in the Biomedical Engineering Program, University of Iowa. This system consists of an EyeCom® II picture digitizer and display, a PDP 11/34 minicomputer with peripherals, a light table and a microscope, and the associate image processing software. The capability of the present system, both hardware and software, is described in detail. Some current biomedical applications using this system along with illustrations are given. Two of the future developments: dynamic imaging and true color imaging are also outlined. ImagesFigure 3Figure 5p583-bFigure 6AFigure 6B

Huang, H.K.; Mankovich, Nicholas J.; Altmaier, Joseph

1981-01-01

394

Image processing for magnetic-resonance elastography  

NASA Astrophysics Data System (ADS)

A newly developed magnetic resonance imaging technique can directly visualize propagating acoustic strain waves in tissue-like materials. By estimating the local wavelength of the acoustic wave pattern, quantitative values of shear modulus can be calculated and images generated that depict tissue elasticity or stiffness. Since tumors are significantly stiffer than normal tissue (the basis of their detection by palpation), this technique may have potential for 'palpation by imaging,' with possible application to the detection of tumors in breast, liver, kidney, and prostate. We describe the local wavelength estimation algorithm, study its properties, and show a variety of sample results.

Manduca, Armando; Muthupillai, Raja; Rossman, P. J.; Greenleaf, James F.; Ehman, Richard L.

1996-04-01

395

SAR image formation processing using planar subarrays  

NASA Astrophysics Data System (ADS)

A highly regular and computationally efficient SAR image formation processor architecture has been developed for wide-area ground surveillance systems. The architecture is based on the repetitive use of a very simple small FFT kernel (instead of a large 2D FFT) providing a variable resolution capability. The first stage of the planar subarray processor (PSAP) forms coarse images and constructs polar formatted, pseudo spotlight SARs. The second stage evaluates the requisite 2D transforms in a multiple- stage block FFT, providing variable resolution images. The fold- FFT is paramount to the computational efficiency of the approach.

Perry, Richard P.; Dipietro, Richard C.; Kozma, A.; Vaccaro, John J.

1994-06-01

396

Teaching the Process of Science: A Critical Component of Introductory Geoscience Courses  

NASA Astrophysics Data System (ADS)

Undergraduate students hold many misconceptions about the nature and process of science, including the social and cultural components of the scientific endeavor. These misconceptions are perhaps even more pronounced in the geosciences, where most students enter college without having been exposed to subject matter in high school. Many faculty and teachers feel that the process of science is embedded in their teaching through the inclusion of laboratory exercises and assigned readings in the primary literature. These techniques utilize the tools of science, but do not necessarily enlighten students in the actual process by which science progresses. Students do gain that understanding when they are involved in research, but the majority of the undergraduate research experiences are capstone experiences for students who choose to major in the science and engineering disciplines. A critical vehicle for teaching most undergraduate students about the process of science, therefore, is the introductory science course. In these courses, teaching the nature and process of science requires going beyond implicit use of the tools and techniques of science to making explicit reference to the process of science and, in addition, allowing students time to reflect on how they have participated in the process. We have developed a new series of freely accessible, web-based reading materials (available at http://www.visionlearning.com/process_science.php) that explicitly discuss the process of science and can be easily incorporated into any introductory science course, including introductory geoscience. These modules cover a variety of topics including specific research methods, such as experimentation, description, and modeling, as well as other aspects of the process of science like scientific writing, data analysis and interpretation, and the use of statistics. Our preliminary assessment results suggest that students find the text interesting and that they specifically address misconceptions held by students prior to reading them. During fall 2008 we will be more thoroughly evaluating the utility of these materials in a treatment-control designed study initiated in a large, introductory non-major science course. This presentation will present an overview of these materials as well as preliminary data from this evaluation.

Egger, A. E.; Carpi, A.

2008-12-01

397

Image processing assessment of femoral osteopenia.  

PubMed

Visual assessment of femoral osteopenia (the radiographic presentation of osteoporosis) is unreliable. Many of the short-comings of observer grading can be overcome by digital image analysis. Our group has developed algorithms to make automatic assessment of osteopenia from clinical radiographs. Texture Analysis Models (TA) commonly used in image analysis were investigated as measures of osteopenia. Unlike densitometric methods, TA characterizes properties of the structure of the image (ie, trabecular patterns). A group of women were analyzed whose subjects ranged from those at risk of osteoporosis (n = 24) to normal (n = 40). Using an IBM PC, frame-grabber, camera, and light-box, we appraised five statistical TA algorithms for assessment of the femoral neck in standard pelvic radiographs: (1) Fractal Signature (FS) describes the image's fractal nature. (2) Auto-Correlation of unaltered and Sobel Edge Transformed images (ACSE) measures image spatial self-similarity. (3) Co-occurrence Matrices (CM) gives the joint probability of greylevels with distance/direction and describes statistical relationships of image variation. (4) Textural Spectrum (TS) neighborhood pixel relationships measure regional directional and pixel-inversion properties. (5) Eular Numbers (EN) describe texture by properties (such as connectivity) of binary images. Good reproducibility from repeated analysis of radiographs was shown using both paired t-tests and Altman-Bland's methods. We have shown a correlation between femoral neck bone mineral density (BMD-the "gold standard" of osteoporosis assessment) and textural measures for all five algorithms. Significant measures of osteopenia were: ACSE (r = 0.6, P < .001), CM (r = -0.69, P < .001), FS (r = 0.35, P < .01), TS (r = 0.52, P < .001) and EN (r = -0.39, P < .01). Relationships were also found between textural characteristics and age/weight. TA techniques characterize the radiographic changes of bone in osteoporosis. Technology based on these ideas may have a place alongside BMD measurements in the assessment of this condition. PMID:9268887

Lee, R L; Dacre, J E; James, M F

1997-08-01

398

Image data processing of earth resources management. [technology transfer  

NASA Technical Reports Server (NTRS)

Various image processing and information extraction systems are described along with the design and operation of an interactive multispectral information system, IMAGE 100. Analyses of ERTS data, using IMAGE 100, over a number of U.S. sites are presented. The following analyses are included: investigations of crop inventory and management using remote sensing; and (2) land cover classification for environmental impact assessments. Results show that useful information is provided by IMAGE 100 analyses of ERTS data in digital form.

Desio, A. W.

1974-01-01

399

Embedded prompting may function as embedded punishment: detection of unexpected behavioral processes within a typical preschool teaching strategy.  

PubMed

This study describes an unexpected behavioral process that influenced behavior during the teaching of concepts to a 4-year-old girl. The efficacy of and preference for three strategies that varied in teacher directedness were assessed in a multielement design and concurrent-chains arrangement, respectively. The strategy that involved the most teacher direction was most efficacious and preferred. In addition, embedded teacher prompts, common in child-led teaching procedures, functioned as a punisher for the child's toy play. Implications for designing effective and preferred teaching conditions are discussed. PMID:21541134

Heal, Nicole A; Hanley, Gregory P

2011-01-01

400

Pyramidal Image-Processing Code For Hexagonal Grid  

NASA Technical Reports Server (NTRS)

Algorithm based on processing of information on intensities of picture elements arranged in regular hexagonal grid. Called "image pyramid" because image information at each processing level arranged in hexagonal grid having one-seventh number of picture elements of next lower processing level, each picture element derived from hexagonal set of seven nearest-neighbor picture elements in next lower level. At lowest level, fine-resolution of elements of original image. Designed to have some properties of image-coding scheme of primate visual cortex.

Watson, Andrew B.; Ahumada, Albert J., Jr.

1990-01-01

401

High resolution image processing on low-cost microcomputers  

NASA Technical Reports Server (NTRS)

Recent advances in microcomputer technology have resulted in systems that rival the speed, storage, and display capabilities of traditionally larger machines. Low-cost microcomputers can provide a powerful environment for image processing. A new software program which offers sophisticated image display and analysis on IBM-based systems is presented. Designed specifically for a microcomputer, this program provides a wide-range of functions normally found only on dedicated graphics systems, and therefore can provide most students, universities and research groups with an affordable computer platform for processing digital images. The processing of AVHRR images within this environment is presented as an example.

Miller, R. L.

1993-01-01

402

Comparison of threshold algorithms for automatic image processing of rice roots using freeware ImageJ  

Microsoft Academic Search

High-throughput phenotyping of crop root system architecture using digital image analysis requires costly special software (WinRHIZO). Novel freeware, ImageJ, has also been developed for the similar purpose, but the presetting of the threshold to create root binary images makes this method time-consuming. This study compares the 16 algorithms available in the ImageJ for processing of rice root images. Among the

Ryosuke Tajima; Yoichiro Kato

2011-01-01

403

Signal and Image Processing for Crime Control and Crime Prevention  

Microsoft Academic Search

In this paper we will take a critical look at the research and development of signal and image processing technologies and new applications of existing technologies to improve crime control and crime prevention. Signal and image processing techniques are used in many aspects of sensing the environment both during a crime and in the post-crime analysis of the scene. Common

Susan Hackwood; P. Aaron Potter

1999-01-01

404

Integrated image processing and tracker performance prediction workstation  

Microsoft Academic Search

Extensive research has shown that including target aspect angle measurements from an optical sensor can significantly improve the performance of radar tracking systems. Integrating sequences of target imagery with the kinematic information involves sets of image processing and sensor data fusion algorithms. A workstation has been developed to expedite the analysis of the algorithms and to integrate the image processing

Timothy J. Schneeberger; Harold D. McIntire

1991-01-01

405

Digital image processing software system using an array processor  

SciTech Connect

A versatile array processor-based system for general-purpose image processing was developed. At the heart of this system is an extensive, flexible software package that incorporates the array processor for effective interactive image processing. The software system is described in detail, and its application to a diverse set of applications at LLNL is briefly discussed. 4 figures, 1 table.

Sherwood, R.J.; Portnoff, M.R.; Journeay, C.H.; Twogood, R.E.

1981-03-10

406

PIPS - A general purpose Parallel Image Processing System  

Microsoft Academic Search

In this paper we discuss general requirements for parallelimplementations of image processing algorithms. Of special importanceare the communication demands in the parallel system which are determinedby the algorithm under consideration. These communicationdemands are decisive for determining the best way to distribute the imagedata to the network processors. Analysing these factors for sometypical image processing algorithms reveals that it is difficult

Michael Nölle; Gerald Schreiber; Hanns Schulz-mirbach

1994-01-01

407

DIGITAL IMAGE PROCESSING FOR AUTOMATION IN ARCHITECTURAL PHOTOGRAMMETRY  

Microsoft Academic Search

Digital image processing techniques open the opportunity to accelerate the architectural photogrammetric process and to relieve the operator from a lot of tedious tasks. Therefore he can concentrate on the interpretation of the features on the building. Beside semi-automatic measurement tools another field of attention is the development of automatic recognition techniques for selected objects in digital images. The use

Chengshuang Li; Volker Rodehorst; Albert Wiedemann

1997-01-01

408

Universal Digital Image Processing Systems in Europe - a Comparative Survey  

Microsoft Academic Search

In the paper, a selected group of eleven universal (computer based) image processing systems is surveyed and compared. They constitute a seemingly representative sample of the vast variety of such systems built in the last decade in European countries. The survey covers systems built for research purposes, either in image processing as such or for some other specific problem area,

Zenon Kulpa

1981-01-01

409

Content-independent image processing based fall detection  

Microsoft Academic Search

A novel detection concept, content-independent image processing system (CIIP system) is designed in this study. The regular life safety of elders who live alone is concerned. It is desired to detect possible falling behaviors and unconscious situations of elders in the case. We intend to use image processing techniques to detect elders’ fall but without the concern of being watched.

Bin-Jen Lee; Shun-Feng Su; Imre Rudas

2011-01-01

410

Image Processing In Laser-Beam-Steering Subsystem  

NASA Technical Reports Server (NTRS)

Conceptual design of image-processing circuitry developed for proposed tracking apparatus described in "Beam-Steering Subsystem For Laser Communication" (NPO-19069). In proposed system, desired frame rate achieved by "windowed" readout scheme in which only pixels containing and surrounding two spots read out and others skipped without being read. Image data processed rapidly and efficiently to achieve high frequency response.

Lesh, James R.; Ansari, Homayoon; Chen, Chien-Chung; Russell, Donald W.

1996-01-01

411

Finite element modeling of geomaterials using digital image processing  

Microsoft Academic Search

This paper presents a digital image processing based finite element method for the two-dimensional mechanical analysis of geomaterials by actually taking into account their material inhomogeneities and microstructures. The proposed method incorporates the theories and techniques of digital image processing, the principles of geometry vectorization and the techniques of automatic finite element mesh generation into the conventional finite element methods.

Z. Q. Yue; S. Chen; L. G. Tham

2003-01-01

412

Encouraging undergraduate research: a digital image processing approach  

Microsoft Academic Search

In recent years, undergraduate research has gained significant attention in many computer science departments. There have been efforts to identify courses that could support undergraduate research activities. Some courses such as image processing provides excellent research opportunities to undergraduate students. However, in small and comprehensive schools there is little or no image processing research to support the course. This paper

Rahman Tashakkori

2005-01-01

413

Digital Image Processing and the Recording of Rock Art  

Microsoft Academic Search

With the advent of low-cost, high-powered computers, access to digital image processing is becoming more common and within reach of every researcher. Many techniques are available to extract information by computer manipulation of images and, therefore, this approach has great potential for the study of rock art. Processing procedures such as selective contrast enhancement, study of detailed areas, edge enhancement,

Phil Clogg; Margarita D??az-Andreu; Brian Larkman

2000-01-01

414

Massively parallel processing of remotely sensed hyperspectral images  

Microsoft Academic Search

In this paper, we develop several parallel techniques for hyperspectral image processing that have been specifically designed to be run on massively parallel systems. The techniques developed cover the three relevant areas of hyperspectral image processing: 1) spectral mixture analysis, a popular approach to characterize mixed pixels in hyperspectral data addressed in this work via efficient implementation of a morphological

Javier Plaza; Antonio Plaza; David Valencia; Abel Paz

2009-01-01

415

Document image processing based on enhanced border following algorithm  

Microsoft Academic Search

An enhanced border-following algorithm and its application to document image processing is presented. Various kinds of components (characters, text lines, text blocks, figures, tables, etc.) in a document image can be flexibly segmented and extracted with a variable-size mask for border following instead of the conventional 3×3-size mask. An automatic document image structuring process to construct a multimedia document and

M. Yamada; K. Hasuike

1990-01-01

416

Application of electrical capacitance tomography for imaging industrial processes  

Microsoft Academic Search

Electrical tomography is, in certain cases, the most attractive method for real imaging of industrial processes, because of\\u000a its inherent simplicity, rugged construction of the tomographer and high-speed capability. This paper presents examples illustrating\\u000a applications of electrical tomography for imaging fluidized beds, bubble columns and pneumatic conveyors. Electrical tomography\\u000a opens up new ways for processing, imaging and modelling multi-phase flows

Dyakowski Tom

2005-01-01

417

Implementing full backtracking facilities for Prolog-based image processing  

NASA Astrophysics Data System (ADS)

PIP (Prolog image processing) is a system currently under development at UWCC, designed to support interactive image processing using the PROLOG programming language. In this paper we discuss Prolog-based image processing paradigms and present a meta-interpreter developed by the first author, designed to support an approach to image processing in PIP which is more in the spirit of Prolog than was previously possible. This meta-interpreter allows backtracking over image processing operations in a manner transparent to the programmer. Currently, for space-efficiency, the programmer needs to indicate over which operations the system may backtrack in a program; however, a number of extensions to the present work, including a more intelligent approach intended to obviate this need, are mentioned at the end of this paper, which the present meta-interpreter will provide a basis for investigating in the future.

Jones, Andrew C.; Batchelor, Bruce G.

1995-10-01

418

Advanced technology development for image gathering, coding, and processing  

NASA Technical Reports Server (NTRS)

Three overlapping areas of research activities are presented: (1) Information theory and optimal filtering are extended to visual information acquisition and processing. The goal is to provide a comprehensive methodology for quantitatively assessing the end-to-end performance of image gathering, coding, and processing. (2) Focal-plane processing techniques and technology are developed to combine effectively image gathering with coding. The emphasis is on low-level vision processing akin to the retinal processing in human vision. (3) A breadboard adaptive image-coding system is being assembled. This system will be used to develop and evaluate a number of advanced image-coding technologies and techniques as well as research the concept of adaptive image coding.

Huck, Friedrich O.

1990-01-01

419

Teaching: Getting It Right.  

ERIC Educational Resources Information Center

Explores the way a high school teacher's intuitive teaching principles developed over time through an autobiographical analysis. Employs a tennis metaphor to describe feelings about the teaching process. Opines that it takes "not thinking too much" to teach well. (DSK)

La Porte, Elizabeth

1996-01-01

420

The Khoros software development environment for image and signal processing.  

PubMed

Data flow visual language systems allow users to graphically create a block diagram of their applications and interactively control input, output, and system variables. Khoros is an integrated software development environment for information processing and visualization. It is particularly attractive for image processing because of its rich collection of tools for image and digital signal processing. This paper presents a general overview of Khoros with emphasis on its image processing and DSP tools. Various examples are presented and the future direction of Khoros is discussed. PMID:18291923

Konstantinides, K; Rasure, J R

1994-01-01

421

Graphical user interface for image acquisition and processing  

DOEpatents

An event-driven GUI-based image acquisition interface for the IDL programming environment designed for CCD camera control and image acquisition directly into the IDL environment where image manipulation and data analysis can be performed, and a toolbox of real-time analysis applications. Running the image acquisition hardware directly from IDL removes the necessity of first saving images in one program and then importing the data into IDL for analysis in a second step. Bringing the data directly into IDL creates an opportunity for the implementation of IDL image processing and display functions in real-time. program allows control over the available charge coupled device (CCD) detector parameters, data acquisition, file saving and loading, and image manipulation and processing, all from within IDL. The program is built using IDL's widget libraries to control the on-screen display and user interface.

Goldberg, Kenneth A. (Berkeley, CA)

2002-01-01

422

Optical Processing of Speckle Images with Bacteriorhodopsin for Pattern Recognition  

NASA Technical Reports Server (NTRS)

Logarithmic processing of images with multiplicative noise characteristics can be utilized to transform the image into one with an additive noise distribution. This simplifies subsequent image processing steps for applications such as image restoration or correlation for pattern recognition. One particularly common form of multiplicative noise is speckle, for which the logarithmic operation not only produces additive noise, but also makes it of constant variance (signal-independent). We examine the optical transmission properties of some bacteriorhodopsin films here and find them well suited to implement such a pointwise logarithmic transformation optically in a parallel fashion. We present experimental results of the optical conversion of speckle images into transformed images with additive, signal-independent noise statistics using the real-time photochromic properties of bacteriorhodopsin. We provide an example of improved correlation performance in terms of correlation peak signal-to-noise for such a transformed speckle image.

Downie, John D.; Tucker, Deanne (Technical Monitor)

1994-01-01

423

A systolic neural network image processing architecture  

Microsoft Academic Search

The architecture introduced, the neural accelerator board (NAB) system, has been designed to perform a range a machine vision functions, of which one is motion parallax range estimation. The approach used in the NAB system, is to perform real-time calculations on the image data, captured by a moving video camera, using a highly parallel neural network architecture. The NAB system

Mario Cavaiuolo; A. J. S. Yakovleff; C. R. Watson; J. A. Kershaw

1992-01-01

424

Optical disk processing of solar images.  

NASA Astrophysics Data System (ADS)

The current generation of space and ground-based experiments in solar physics produces many megabyte-sized image data arrays. Optical disk technology is the leading candidate for convenient analysis, distribution, and archiving of these data. The authors have been developing data analysis procedures which use both analog and digital optical disks for the study of solar phenomena.

Title, A.; Tarbell, T.

425

Information Processing in Medical Imaging Meeting (IPMI).  

National Technical Information Service (NTIS)

Welcome to the thirteenth IPMI. As attendees here in beautiful northern Arizona, you are part of a tradition extending back to the early days of digital imaging. This conference holds a special place in the hearts of many longtime IPMI-goers. No other con...

H. H. Barrett

1993-01-01

426

Vibration mode shape recognition using image processing  

NASA Astrophysics Data System (ADS)

Currently the most widely used method for comparing mode shapes from finite elements and experimental measurements is the modal assurance criterion (MAC), which can be interpreted as the cosine of the angle between the numerical and measured eigenvectors. However, the eigenvectors only contain the displacement of discrete coordinates, so that the MAC index carries no explicit information on shape features. New techniques, based upon the well-developed philosophies of image processing (IP) and pattern recognition (PR) are considered in this paper. The Zernike moment descriptor (ZMD), Fourier descriptor (FD), and wavelet descriptor (WD) are the most popular shape descriptors due to their outstanding properties in IP and PR. These include (1) for the ZMD-rotational invariance, expression and computing efficiency, ease of reconstruction and robustness to noise; (2) for the FD—separation of the global shape and shape-details by low and high frequency components, respectively, invariance under geometric transformation; (3) for the WD—multi-scale representation and local feature detection. Once a shape descriptor has been adopted, the comparison of mode shapes is transformed to a comparison of multidimensional shape feature vectors. Deterministic and statistical methods are presented. The deterministic problem of measuring the degree of similarity between two mode shapes (possibly one from a vibration test and the other from a finite element model) may be carried out using Pearson's correlation. Similar shape feature vectors may be arranged in clusters separated by Euclidian distances in the feature space. In the statistical analysis we are typically concerned with the classification of a test mode shape according to clusters of shape feature vectors obtained from a randomised finite element model. The dimension of the statistical problem may often be reduced by principal component analysis. Then, in addition to the Euclidian distance, the Mahalanobis distance, defining the separation of the test point from the cluster in terms of its standard deviation, becomes an important measure. Bayesian decision theory may be applied to formally minimise the risk of misclassification of the test shape feature vector. In this paper the ZMD is applied to the problem of mode shape recognition for a circular plate. Results show that the ZMD has considerable advantages over the traditional MAC index when identifying the cyclically symmetric mode shapes that occur in axisymmetric structures at identical frequencies. Mode shape recognition of rectangular plates is carried out by the FD. Also, the WD is applied to the problem of recognising the mode shapes in the thin and thick regions of a plate with different thicknesses. It shows the benefit of using the WD to identify mode-shapes having both local and global components. The comparison and classification of mode shapes using IP and PR provides a 'toolkit' to complement the conventional MAC approach. The selection of a particular shape descriptor and classification method will depend upon the problem in hand and the experience of the analyst.

Wang, Weizhuo; Mottershead, John E.; Mares, Cristinel

2009-10-01

427

Image processing system to analyze droplet distributions in sprays  

NASA Technical Reports Server (NTRS)

An image processing system was developed which automatically analyzes the size distributions in fuel spray video images. Images are generated by using pulsed laser light to freeze droplet motion in the spray sample volume under study. This coherent illumination source produces images which contain droplet diffraction patterns representing the droplets degree of focus. The analysis is performed by extracting feature data describing droplet diffraction patterns in the images. This allows the system to select droplets from image anomalies and measure only those droplets considered in focus. Unique features of the system are the totally automated analysis and droplet feature measurement from the grayscale image. The feature extraction and image restoration algorithms used in the system are described. Preliminary performance data is also given for two experiments. One experiment gives a comparison between a synthesized distribution measured manually and automatically. The second experiment compares a real spray distribution measured using current methods against the automatic system.

Bertollini, Gary P.; Oberdier, Larry M.; Lee, Yong H.

1987-01-01

428

Image reversal trilayer process using standard positive photoresist  

NASA Astrophysics Data System (ADS)

Conventional trilayer schemes alleviate the decreasing photoresist budgets as well as satisfy the antireflection issues associated with high NA imaging. However, a number of challenges still exist with standard trilayer processing, most notable among which is the lack of broad resist compatibility and trade-offs associated with improving Si content, such as stability and lithography performance. One way to circumvent these issues is to use a silicon hard mask coated over a photoresist image of reverse tone to the desired pattern. Feasibility of this image reversal trilayer process was demonstrated by patterning of trenches and contact holes in a carbon hard mask from line and pillar photoresist images, respectively. This paper describes the lithography, pattern transfer process and materials developed for the image reversal trilayer processing.

Abdallah, David J.; Sagan, John; Kurosawa, Kazunori; Li, Jin; Takano, Yusuke; Shimizu, Yasuo; Shinde, Ninad; Nagahara, Tatsuro; Ishikawa, Tomonori; Dammel, Ralph R.

2009-03-01

429

Optical Signal Processing: Poisson Image Restoration and Shearing Interferometry  

NASA Technical Reports Server (NTRS)

Optical signal processing can be performed in either digital or analog systems. Digital computers and coherent optical systems are discussed as they are used in optical signal processing. Topics include: image restoration; phase-object visualization; image contrast reversal; optical computation; image multiplexing; and fabrication of spatial filters. Digital optical data processing deals with restoration of images degraded by signal-dependent noise. When the input data of an image restoration system are the numbers of photoelectrons received from various areas of a photosensitive surface, the data are Poisson distributed with mean values proportional to the illuminance of the incoherently radiating object and background light. Optical signal processing using coherent optical systems is also discussed. Following a brief review of the pertinent details of Ronchi's diffraction grating interferometer, moire effect, carrier-frequency photography, and achromatic holography, two new shearing interferometers based on them are presented. Both interferometers can produce variable shear.

Hong, Yie-Ming

1973-01-01

430

Hadoop plugin for distributed and parallel image processing  

Microsoft Academic Search

Hadoop Distributed File System (HDFS) is widely used in large-scale data storage and processing. HDFS uses MapReduce programming model for parallel processing. The work presented in this paper proposes a novel Hadoop plugin to process image files with MapReduce model. The plugin introduces image related I\\/O formats and novel classes for creating records from input files. HDFS is especially designed

Ilginc Demir; Ahmet Sayar

2012-01-01

431

Performance evaluation of image processing algorithms in digital mammography  

NASA Astrophysics Data System (ADS)

The purpose of the study is to evaluate the performance of different image processing algorithms in terms of representation of microcalcification clusters in digital mammograms. Clusters were simulated in clinical raw ("for processing") images. The entire dataset of images consisted of 200 normal mammograms, selected out of our clinical routine cases and acquired with a Siemens Novation DR system. In 100 of the normal images a total of 142 clusters were simulated; the remaining 100 normal mammograms served as true negative input cases. Both abnormal and normal images were processed with 5 commercially available processing algorithms: Siemens OpView1 and Siemens OpView2, Agfa Musica1, Sectra Mamea AB Sigmoid and IMS Raffaello Mammo 1.2. Five observers were asked to locate and score the cluster(s) in each image, by means of dedicated software tool. Observer performance was assessed using the JAFROC Figure of Merit. FROC curves, fitted using the IDCA method, have also been calculated. JAFROC analysis revealed significant differences among the image processing algorithms in the detection of microcalcifications clusters (p=0.0000369). Calculated average Figures of Merit are: 0.758 for Siemens OpView2, 0.747 for IMS Processing 1.2, 0.736 for Agfa Musica1 processing, 0.706 for Sectra Mamea AB Sigmoid processing and 0.703 for Siemens OpView1. This study is a first step towards a quantitative assessment of image processing in terms of cluster detection in clinical mammograms. Although we showed a significant difference among the image processing algorithms, this method does not on its own allow for a global performance ranking of the investigated algorithms.

Zanca, Federica; Van Ongeval, Chantal; Jacobs, Jurgen; Pauwels, Herman; Marchal, Guy; Bosmans, Hilde

2008-04-01

432

Subway tunnel crack identification algorithm research based on image processing  

NASA Astrophysics Data System (ADS)

The detection of cracks in tunnels has profound impact on the tunnel's safety. It's common for low contrast, uneven illumination and severe noise pollution in tunnel surface images. As traditional image processing algorithms are not suitable for detecting tunnel cracks, a new image processing method for detecting cracks in surface images of subway tunnels is presented in this paper. This algorithm includes two steps. The first step is a preprocessing which uses global and local methods simultaneously. The second step is the elimination of different types of noises based on the connected components. The experimental results show that the proposed algorithm is effective for detecting tunnel surface cracks.

Bai, Biao; Zhu, Liqiang; Wang, Yaodong

2014-04-01

433

Computer vision applications for coronagraphic optical alignment and image processing  

NASA Astrophysics Data System (ADS)

Modern coronagraphic systems require very precise alignment between optical components and can benefit greatly from automated image processing. We discuss three techniques commonly employed in the fields of computer vision and image analysis as applied to the Gemini Planet Imager, a new facility instrument for the Gemini South Observatory. We describe how feature extraction and clustering methods can be used to aid in automated system alignment tasks, and also present a search algorithm for finding regular features in science images used for calibration and data processing. Along with discussions of each technique, we present our specific implementation and show results of each one in operation.

Savransky, Dmitry; Thomas, Sandrine J.; Poyneer, Lisa A.; Macintosh, Bruce A.

2013-05-01

434

Syntactic algorithms for image segmentation and a special computer architecture for image processing  

Microsoft Academic Search

Several efficient algorithms for image recognition and segmentation and a new computer architecture for image processing are proposed. The algorithms are 'Syntactic' in that they perform structural or spatial analysis rather than statistical analysis, and a 'grammar' is inferred for describing the structures of patterns in an image. Depending on the requirements of the problem, an appropriate grammatical approach is

J. Keng; K. S. Fu

1977-01-01

435

Digital image processing for clinicians, part I: Basics of image formation  

Microsoft Academic Search

Conclusion  Image formation is the part of digital image processing that creates the interface between the clinician and the computer.\\u000a Pixel depth, resolution, and the translation table used are all important factors affecting the final image.

Christopher L. Hansen

2002-01-01

436

[Studies on digital watermark embedding intensity against image processing and image deterioration].  

PubMed

In order to apply digital watermarking to medical imaging, it is required to find a trade-off between strength of watermark embedding and deterioration of image quality. In this study, watermarks were embedded in 4 types of modality images to determine the correlation among the watermarking strength, robustness against image processing, and image deterioration due to embedding. The results demonstrated that watermarks which were embedded by the least significant bit insertion method became unable to be detected and recognized on image processing even if the watermarks were embedded with such strength that could cause image deterioration. On the other hand, watermarks embedded by the Discrete Cosine Transform were clearly detected and recognized even after image processing regardless of the embedding strength. The maximum level of embedding strength that will not affect diagnosis differed depending on the type of modality. It is expected that embedding the patient information together with the facility information as watermarks will help maintain the patient information, prevent mix-ups of the images, and identify the test performing facilities. The concurrent use of watermarking less resistant to image processing makes it possible to detect whether any image processing has been performed or not. PMID:15159668

Nishio, Masato; Ando, Yutaka; Tsukamoto, Nobuhiro; Kawashima, Hironao

2004-04-01

437

Digital processing of stereoscopic image pairs.  

NASA Technical Reports Server (NTRS)

The problem under consideration is concerned with scene analysis during robot navigation on the surface of Mars. In this mode, the world model of the robot must be continuously updated to include sightings of new obstacles and scientific samples. In order to describe the content of a particular scene, it is first necessary to segment it into known objects. One technique for accomplishing this segmentation is by analyzing the pair of images produced by the stereoscopic cameras mounted on the robot. A heuristic method is presented for determining the range for each point in the two-dimensional scene under consideration. The method is conceptually based on a comparison of corresponding points in the left and right images of the stereo pair. However, various heuristics which are adaptive in nature are used to make the algorithm both efficient and accurate. Examples are given of the use of this so-called range picture for the purpose of scene segmentation.

Levine, M. D.

1973-01-01

438

Fast image processing on chain board of inverted tooth chain  

NASA Astrophysics Data System (ADS)

Discussed ordinary image processing technology of inverted tooth chain board, including noise reduction, image segmentation, edge detection and contour extraction etc.. Put forward a new kind of sub-pixel arithmetic for edge orientation of circle. The arithmetic first did edge detection to image by Canny arithmetic, so as to enhance primary orientation precision of edge, then calculated gradient direction, and then interpolated gradient image (image that was detected by Sobel arithmetic) along gradient direction, last obtained sub-pixel orientation of edge. Performed two kinds of least-square fitting methods for line edge to getting its sub-pixel orientation, from analysis and experiments, the orientation error of improved least-square linear fitting method was one quarter of ordinary least-square linear fitting error under small difference of orientation time. The sub-pixel orientation of circle made resolution of CCD increase 42 tines, which enhanced greatly orientation precision of image edge. For the need of quick on-line inspection next step, integrated the whole environment containing image preprocess, Hough conversion of line, setting orientation & direction of image, sub-pixel orientation of line and circle, output of calculation result. The whole quick processing course performed without operator, processing tine of single part is less than 0.3 second. The sub-pixel orientation method this paper posed fits precision orientation of image, and integration calculation method ensure requirement of quick inspection, and lays the foundations for on-line precision visual measurement of image.

Liu, Qing-min; Li, Guo-fa

2007-11-01

439

Image processing and fusion to detect navigation obstacles  

NASA Astrophysics Data System (ADS)

Helicopters flying at low altitude in the visual flight rules often crash against obstacles such as a power transmission line. This paper describes the image sensors to detect obstacles and the several image processing techniques to derive and enhance the targets in the images. The images including obstacles were collected both on the ground and by air using an infrared (IR) camera and a color video camera in different backgrounds, distances, and weather conditions. Collected results revealed that IR images have an advantage over color images to detect obstacles in many environments. Several image processing techniques have been evaluated to improve the qualities of collected images. For example, fusion of IR and color images, several filters, such as the Median filter or the adaptive filter have been tested. Information that the target is thin and long, which characterizes the shape of power lines, has been introduced to derive power lines. It has been shown that these processes can greatly reduce the noise and enhance the contrast, no matter how the background is. It has also been demonstrated that there is a good prospect that these processes will help develop the algorithm for automatic obstacle detection and warning.

Yamamoto, Kazuo; Yamada, Kimio

1998-07-01

440

Processing ISS Images of Titan's Surface  

NASA Technical Reports Server (NTRS)

One of the primary goals of the Cassini-Huygens mission, in orbit around Saturn since July 2004, is to understand the surface and atmosphere of Titan. Surface investigations are primarily accomplished with RADAR, the Visual and Infrared Mapping Spectrometer (VIMS), and the Imaging Science Subsystem (ISS) [1]. The latter two use methane "windows", regions in Titan's reflectance spectrum where its atmosphere is most transparent, to observe the surface. For VIMS, this produces clear views of the surface near 2 and 5 microns [2]. ISS uses a narrow continuum band filter (CB3) at 938 nanometers. While these methane windows provide our best views of the surface, the images produced are not as crisp as ISS images of satellites like Dione and Iapetus [3] due to the atmosphere. Given a reasonable estimate of contrast (approx.30%), the apparent resolution of features is approximately 5 pixels due to the effects of the atmosphere and the Modulation Transfer Function of the camera [1,4]. The atmospheric haze also reduces contrast, especially with increasing emission angles [5].

Perry, Jason; McEwen, Alfred; Fussner, Stephanie; Turtle, Elizabeth; West, Robert; Porco, Carolyn; Knowles, Ben; Dawson, Doug

2005-01-01

441

Parallel image processing and image understanding. Final report, April 1985-March 1986  

SciTech Connect

This research was conducted to obtain better methods for image processing. It focused on several aspects of this problem, including parallel algorithms for image processing, knowledge-based techniques for image understanding, and modeling images using shape and texture. Eighteen technical reports produced will also appear as published papers in journals. In the paper Holes and Genus of 3D images, it was shown that certain geometric invariants of a digital image (number of components, number of holes, and number of cavities) do not determine the topology (in the sense of connectivity) of the image refuting the commonly believed assumption that they do. This research lays the groundwork for research on digital and computational geometry of 3D images. In the paper Hough Transform Algorithms for Mesh-Connected SIMD Parallel Processors, several methods of Hough transform computation are studied in terms of suitability for implementation on a parallel processor, providing a valuable tool for straight-line detection.

Rosenfeld, A.

1986-03-31

442

Processing, analysis, recognition, and automatic understanding of medical images  

NASA Astrophysics Data System (ADS)

Paper presents some new ideas introducing automatic understanding of the medical images semantic content. The idea under consideration can be found as next step on the way starting from capturing of the images in digital form as two-dimensional data structures, next going throw images processing as a tool for enhancement of the images visibility and readability, applying images analysis algorithms for extracting selected features of the images (or parts of images e.g. objects), and ending on the algorithms devoted to images classification and recognition. In the paper we try to explain, why all procedures mentioned above can not give us full satisfaction in many important medical problems, when we do need understand image semantic sense, not only describe the image in terms of selected features and/or classes. The general idea of automatic images understanding is presented as well as some remarks about the successful applications of such ideas for increasing potential possibilities and performance of computer vision systems dedicated to advanced medical images analysis. This is achieved by means of applying linguistic description of the picture merit content. After this we try use new AI methods to undertake tasks of the automatic understanding of images semantics in intelligent medical information systems. A successful obtaining of the crucial semantic content of the medical image may contribute considerably to the creation of new intelligent multimedia cognitive medical systems. Thanks to the new idea of cognitive resonance between stream of the data extracted form the image using linguistic methods and expectations taken from the representation of the medical knowledge, it is possible to understand the merit content of the image even if the form of the image is very different from any known pattern.

Tadeusiewicz, Ryszard; Ogiela, Marek R.

2004-07-01

443

Solar cell crack inspection by image processing  

Microsoft Academic Search

Spacecraft operate in a hostile environment, far from the Earth, so it is necessary for solar cells with anti-radiation properties to have a bonding process carried out on them. After bonding, an essential process for the solar cell assembly is to inspect for cracks on the edges or inside the solar cell. To avoid utilizing unqualified products and to improve

Fu Zhuang; Zhao Yanzheng; Liu Yang; Cao Qixin; Chen Mingbo; Zhang Jun; Jay Lee

2004-01-01

444

Ground control requirements for precision processing of ERTS images  

USGS Publications Warehouse

When the first Earth Resources Technology Satellite (ERTS-A) flies in 1972, NASA expects to receive and bulk-process 9,000 images a week. From this deluge of images, a few will be selected for precision processing; that is, about 5 percent will be further treated to improve the geometry of the scene, both in the relative and absolute sense. Control points are required for this processing. This paper describes the control requirements for relating ERTS images to a reference surface of the earth. Enough background on the ERTS-A satellite is included to make the requirements meaningful to the user.

Burger, Thomas C.

1972-01-01

445

Studying Students' Learning Processes Used during Physics Teaching Sequence about Gas with Networks of Ideas and Their Domain of Applicability  

ERIC Educational Resources Information Center

In literature, several processes have been suggested to describe conceptual changes being undertaken. However, a few parts of studies analyse in great detail which students' learning processes are involved in physics classes during teaching, and how they are used. Following a socio-constructivist approach using tools coming from discourse…

Givry, Damien; Tiberghien, Andree

2012-01-01

446

A Case Study Analysing the Process of Analogy-Based Learning in a Teaching Unit about Simple Electric Circuits  

ERIC Educational Resources Information Center

The purpose of this case study is to analyse the learning processes of a 16-year-old student as she learns about simple electric circuits in response to an analogy-based teaching sequence. Analogical thinking processes are modelled by a sequence of four steps according to Gentner's structure mapping theory (activate base domain, postulate local…

Paatz, Roland; Ryder, James; Schwedes, Hannelore; Scott, Philip

2004-01-01

447

Image pre-processing for optimizing automated photogrammetry performances  

NASA Astrophysics Data System (ADS)

The purpose of this paper is to analyze how optical pre-processing with polarizing filters and digital pre-processing with HDR imaging, may improve the automated 3D modeling pipeline based on SFM and Image Matching, with special emphasis on optically non-cooperative surfaces of shiny or dark materials. Because of the automatic detection of homologous points, the presence of highlights due to shiny materials, or nearly uniform dark patches produced by low reflectance materials, may produce erroneous matching involving wrong 3D point estimations, and consequently holes and topological errors on the mesh originated by the associated dense 3D cloud. This is due to the limited dynamic range of the 8 bit digital images that are matched each other for generating 3D data. The same 256 levels can be more usefully employed if the actual dynamic range is compressed, avoiding luminance clipping on the darker and lighter image areas. Such approach is here considered both using optical filtering and HDR processing with tone mapping, with experimental evaluation on different Cultural Heritage objects characterized by non-cooperative optical behavior. Three test images of each object have been captured from different positions, changing the shooting conditions (filter/no-filter) and the image processing (no processing/HDR processing), in order to have the same 3 camera orientations with different optical and digital pre-processing, and applying the same automated process to each photo set.

Guidi, G.; Gonizzi, S.; Micoli, L. L.

2014-05-01

448

Learning and teaching about the nature of science through process skills  

NASA Astrophysics Data System (ADS)

This dissertation, a three-paper set, explored whether the process skills-based approach to nature of science instruction improves teachers' understandings, intentions to teach, and instructional practice related to the nature of science. The first paper examined the nature of science views of 53 preservice science teachers before and after a year of secondary science methods instruction that incorporated the process skills-based approach. Data consisted of each participant's written and interview responses to the Views of the Nature of Science (VNOS) questionnaire. Systematic data analysis led to the conclusion that participants exhibited statistically significant and practically meaningful improvements in their nature of science views and viewed teaching the nature of science as essential to their future instruction. The second and third papers assessed the outcomes of the process skills-based approach with 25 inservice middle school science teachers. For the second paper, she collected and analyzed participants' VNOS and interview responses before, after, and 10 months after a 6-day summer professional development. Long-term retention of more aligned nature of science views underpins teachers' ability to teach aligned conceptions to their students yet it is rarely examined. Participants substantially improved their nature of science views after the professional development, retained those views over 10 months, and attributed their more aligned understandings to the course. The third paper addressed these participants' instructional practices based on participant-created video reflections of their nature of science and inquiry instruction. Two participant interviews and class notes also were analyzed via a constant comparative approach to ascertain if, how, and why the teachers explicitly integrated the nature of science into their instruction. The participants recognized the process skills-based approach as instrumental in the facilitation of their improved views. Additionally, the participants saw the nature of science as an important way to help students to access core science content such as the theory of evolution by natural selection. Most impressively, participants taught the nature of science explicitly and regularly. This instruction was student-centered, involving high levels of student engagement in ways that represented applying, adapting, and innovating on what they learned in the summer professional development.

Mulvey, Bridget K.

449

Craft, Process and Art: Teaching and Learning Music Composition in Higher Education  

ERIC Educational Resources Information Center

This paper explores models of teaching and learning music composition in higher education. It analyses the pedagogical approaches apparent in the literature on teaching and learning composition in schools and universities, and introduces a teaching model as: learning from the masters; mastery of techniques; exploring ideas; and developing voice.…

Lupton, Mandy; Bruce, Christine

2010-01-01

450

Experiential Learning Process: Exploring Teaching and Learning of Strategic Management Framework through the Winter Survival Exercise  

Microsoft Academic Search

This article examines an attempt to introduce experiential learning methods in a business strategy course. In organizational behavior and industrial\\/organizational psychology, experiential teaching methods have been so widely adopted that some authors have suggested dropping the distinction between experiential and traditional teaching. Although intuitively appealing, experiential methods have not yet become popular among professors teaching strategy to traditional-age undergraduate students.

Maheshkumar P. Joshi; Elizabeth B. Davis; Ravi Kathuria; C. Ken Weidner

2005-01-01

451

A Behavioral Analysis of the Laboratory Learning Process: Redesigning a Teaching Unit on Recrystallization.  

ERIC Educational Resources Information Center

Reports on a project in which observations of student and teaching assistant behavior were used to redesign a teaching unit on recrystallization. Comments on the instruction manual, starting points for teaching the unit, and list of objectives with related tasks are included. (JN)

Mulder, T.; Verdonk, A. H.

1984-01-01

452

Signal processing computer system for multi-wavelength imaging pyrometer  

Microsoft Academic Search

The development of the multi-wavelength imaging pyrometer (M-WIP) workstation, a signal processing computer system for multi-wavelength imaging pyrometer, is presented in this paper. The M-WIP was developed for non-contact surface temperature profile measurement of distant objects with unknown spectrally varying emissivity. The M-WIP workstation was designed as a general purpose computer system for electronic imaging, and its application targets are

Jun Li; Edwin Hou; Walter F. Kosonocky

1996-01-01

453

SAR oil spill image processing with self-adapted wavelet  

Microsoft Academic Search

In order to improve the efficiency of oil spill detection with wavelet analysis according to SAR image, a 2-D self-adapted scale and wavelet construction algorithm is designed. The self-adapted two-0dimension scale function and wavelet is constructed according to oil spill SAR image with the construction algorithm. Original oil spill SAR image is processed with the constructed self-adapted scale and wavelet.

Chungeng Li; Jubai An

2007-01-01

454

Subband/Transform MATLAB Functions For Processing Images  

NASA Technical Reports Server (NTRS)

SUBTRANS software is package of routines implementing image-data-processing functions for use with MATLAB*(TM) software. Provides capability to transform image data with block transforms and to produce spatial-frequency subbands of transformed data. Functions cascaded to provide further decomposition into more subbands. Also used in image-data-compression systems. For example, transforms used to prepare data for lossy compression. Written for use in MATLAB mathematical-analysis environment.

Glover, D.

1995-01-01

455

Creating & using specimen images for collection documentation, research, teaching and outreach  

NASA Astrophysics Data System (ADS)

In this age of digital media, there are many opportunities for use of good images of specimens. On-line resources such as institutional web sites and global sites such as PaleoNet and the Paleobiology Database provide venues for collection information and images. Pictures can also be made available to the general public through popular media sites such as Flickr and Facebook, where they can be retrieved and used by teachers, students, and the general public. The number of requests for specimen loans can be drastically reduced by offering the scientific community access to data and specimen images using the internet. This is an important consideration in these days of limited support budgets, since it reduces the amount of staff time necessary for giving researchers and educators access to collections. It also saves wear and tear on the specimens themselves. Many institutions now limit or refuse to send specimens out of their own countries because of the risks involved in going through security and customs. The internet can bridge political boundaries, allowing everyone equal access to collections. In order to develop photographic documentation of a collection, thoughtful preparation will make the process easier and more efficient. Acquire the necessary equipment, establish standards for images, and develop a simple workflow design. Manage images in the camera, and produce the best possible results, rather than relying on time-consuming editing after the fact. It is extremely important that the images of each specimen be of the highest quality and resolution. Poor quality, low resolution photos are not good for anything, and will often have to be retaken when another need arises. Repeating the photography process involves more handling of specimens and more staff time. Once good photos exist, smaller versions can be created for use on the web. The originals can be archived and used for publication and other purposes.

Demouthe, J. F.

2012-12-01

456

Detecting jaundice by using digital image processing  

NASA Astrophysics Data System (ADS)

When strong Jaundice is presented, babies or adults should be subject to clinical exam like "serum bilirubin" which can cause traumas in patients. Often jaundice is presented in liver disease such as hepatitis or liver cancer. In order to avoid additional traumas we propose to detect jaundice (icterus) in newborns or adults by using a not pain method. By acquiring digital images in color, in palm, soles and forehead, we analyze RGB attributes and diffuse reflectance spectra as the parameter to characterize patients with either jaundice or not, and we correlate that parameters with the level of bilirubin. By applying support vector machine we distinguish between healthy and sick patients.

Castro-Ramos, J.; Toxqui-Quitl, C.; Villa Manriquez, F.; Orozco-Guillen, E.; Padilla-Vivanco, A.; Sánchez-Escobar, JJ.

2014-03-01

457

A novel data processing technique for image reconstruction of penumbral imaging  

NASA Astrophysics Data System (ADS)

CT image reconstruction technique was applied to the data processing of the penumbral imaging. Compared with other traditional processing techniques for penumbral coded pinhole image such as Wiener, Lucy-Richardson and blind technique, this approach is brand new. In this method, the coded aperture processing method was used for the first time independent to the point spread function of the image diagnostic system. In this way, the technical obstacles was overcome in the traditional coded pinhole image processing caused by the uncertainty of point spread function of the image diagnostic system. Then based on the theoretical study, the simulation of penumbral imaging and image reconstruction was carried out to provide fairly good results. While in the visible light experiment, the point source of light was used to irradiate a 5mm×5mm object after diffuse scattering and volume scattering. The penumbral imaging was made with aperture size of ~20mm. Finally, the CT image reconstruction technique was used for image reconstruction to provide a fairly good reconstruction result.

Xie, Hongwei; Li, Hongyun; Xu, Zeping; Song, Guzhou; Zhang, Faqiang; Zhou, Lin

2011-04-01

458

Recent developments in morphological image processing for remote sensing  

NASA Astrophysics Data System (ADS)

This paper highlights a series of recent developments in morphological image processing that are of interest for the analysis of remote sensing data. Each selected development is briefly presented while emphasising its usefulness in the context of real applications. The following topics are covered: grey level hit-or-miss transforms applied to the detection of specific man-made structures in panchromatic images, iterative area filtering for multichannel image simplification, constrained connectivity applied to hierarchical image partitioning of very high resolution images, mosaicing of an arbitrary number of images by automatically finding seam lines following salient image structures, and morphological segmentation of binary patterns applied to the characterisation of land cover classes. The paper concludes with challenges ahead and an open question.

Soille, Pierre

2009-09-01

459

Multimission Image Processing and Science Data Visualization.  

National Technical Information Service (NTIS)

The Operational Science Analysis (OSA) Functional area supports science instrument data display, analysis, visualization and photo processing in support of flight operations of planetary spacecraft managed by the Jet Propulsion Laboratory (JPL). This pape...

W. B. Green

1993-01-01

460

Comprehensive processing, display and analysis forin vivo MR spectroscopic imaging  

Microsoft Academic Search

Image reconstruction for magnetic resonance spectroscopic imaging (MRSI) requires specialized spatial and spectral data processing methods and benefits from the use of several sources of prior information that are not commonly available, including MRI-derived tissue segmentation, morphological analysis and spectral characteristics of the observed metabolites. In addition, incorporating information obtained from MRI data can enhance the display of low-resolution metabolite

A. A. Maudsley; A. Darkazanli; J. R. Alger; L. O. Hall; N. Schuff; C. Studholme; Y. Yu; A. Ebel; A. Frew; D. Goldgof; Y. Gu; R. Pagare; F. Rousseau; K. Sivasankaran; B. J. Soher; P. Weber; K. Young; X. Zhu

2006-01-01

461

An Image Database on a Parallel Processing Network.  

ERIC Educational Resources Information Center

Describes the design and development of an image database for photographs in the Ulster Museum (Northern Ireland) that used parallelism from a transputer network. Topics addressed include image processing techniques; documentation needed for the photographs, including indexing, classifying, and cataloging; problems; hardware and software aspects;…

Philip, G.; And Others

1991-01-01

462

An application of wavelet transform method to CCD image processing  

NASA Astrophysics Data System (ADS)

A new method of CCD image processing, two-dimensions Mexican Hat wavelet transform, is put forward for the purpose of improving the quality of the CCD images of uranian satellites. The results show that the background gradient and noises of Miranda are removed successfully and the satellite nearer to the primary can be separated from the halo of the primary.

Zi, Li-Ping; Qiao, Rong-Chuan; Liu, Jian-Rong

2003-06-01

463

Combining decision support and image processing: a PROforma model  

Microsoft Academic Search

This paper addresses two important problems in medical image interpretation: (1) integration of numeric and symbolic information, (2) access to external sources of medical knowledge. We have developed a prototype in which image processing algorithms are combined with symbolic representations for reasoning, decision making and task management in an integrated, platform-independent system for the differential diagnosis of abnormalities in mammograms.

M. Sordo; J. Fox; C. Blum; Paul Taylor; Richard Lee; Eugenio Alberdi

464

Digital image processing methods based on Visual C#.NET  

Microsoft Academic Search

In the paper we introduce three methods for image processing, they are pixel extraction method, memory method and pointer method. With the same condition of data structure and algorithm, the three methods are used in edge detection for the digital images. In order to compare the actual operation efficiency of these three kinds of methods, we use C# to write

Yan Wang; Yinjie Cao

2011-01-01

465

Optimization and application of Retinex algorithm in aerial image processing  

Microsoft Academic Search

In this paper, we provide a segmentation based Retinex for improving the visual quality of aerial images obtained under complex weather conditions. With the method, an aerial image will be segmented into different regions, and then an adaptive Gaussian based on the segmentations will be used to process it. The method addresses the problems existing in previously developed Retinex algorithms,

Bo Sun; Jun He; Hongyu Li

2008-01-01

466

Remote sensing digital image processing techniques in active faults survey  

Microsoft Academic Search

In this paper, an effective method is presented to identify active faults from different sources of remote sensing images. First, we compared the capability of some satellite sensors in active faults survey. Then, we discussed a few digital image processing approaches used for information enhancement and feature extraction related to faults. Those methods include band ratio, PCA (Principal Components Analysis),

Y. F. Tian; J. F. Zhang; A. X. Dou; D. L. Wang; L. X. Gong; F. J. Zhao; H. L. Wang; F. J. Wang

2003-01-01

467

Digital image processing system for magnetic domain observation in SEM  

Microsoft Academic Search

A digital image processing (DIP) system and its application for domain observation in cobalt monocrystals by the type-I magnetic contrast in a scanning electron microscope (SEM) is presented. The system capabilities shown include contrast enhancement, noise reduction, removal of tilted illumination and undesirable periodic patterns from the image, Fourier analysis and determination of the magnetic domain width. In particular, it

Witold Szmaja

1998-01-01

468

Outer Product Expansions and Their Uses in Digital Image Processing  

Microsoft Academic Search

This paper is intended as a tutorial review of certain digital image processing transform techniques utilizing the notion of outer product expansions. Examples from Fourier, Walsh, Haar, and other well known transforms are reviewed in the notation of matrix-vector outer products; and implementation of the singular value decomposition (SVD) of large sized images is presented. The use of the SVD

Harry C. Andrews; Claude L. Patterson III

1976-01-01

469

Assessment of tardive dyskinesia by means of digital image processing  

Microsoft Academic Search

A wireless device for the assessment of tardive dyskinesia by means of digital image processing is presented. Four skin-cream dots placed around the subjects' mouth are recorded by a video camera. The image is passed to a framegrabber with a signal processor, where it is converted from analogue to digital. A fast spot-detecting algorithm implemented on the signal processor tracks

Wagner F. Gattaz; Christian Biichel

1993-01-01

470

Orthogonal Rotation-Invariant Moments for Digital Image Processing  

Microsoft Academic Search

Orthogonal rotation-invariant moments (ORIMs), such as Zernike moments, are introduced and defined on a continuous unit disk and have been proven powerful tools in optics applications. These moments have also been digitized for applications in digital image processing. Unfortunately, digitization compromises the orthogonality of the moments and, therefore, digital ORIMs are incapable of representing subtle details in images and cannot

Huibao Lin; Jennie Si; Glen P. Abousleman

2008-01-01

471

Facial expression recognition using thermal image processing and neural network  

Microsoft Academic Search

A method using thermal image processing and a neural network is presented for recognition of facial expression. The method is based on 2-dimensional detection of temperature distribution of the face, using infrared rays. The front-view face in the input image is normalized in terms of the size and the location, followed by measurement of the local temperature difference between the

Y. Yoshitomi; N. Miyawaki; S. Tomita; S. Kimura

1997-01-01

472

Class 2 MIVS image processing system (MIPS) evaluation.  

National Technical Information Service (NTIS)

The Modular Integrated Video System (MIVS) Image Processing System (MIPS) was developed to assist the International Atomic Energy Agency (IAEA) Inspectorate in the safeguards review of MIVS surveillance data. MIPS is designed to review MIVS surveillance d...

R. D. Horton J. V. Whichello

1991-01-01

473

Signal Processing and Acoustic Imaging Models for Animal Sonar.  

National Technical Information Service (NTIS)

A biologically inspired acoustic imaging process is obtained by considering the constraints (e.g., limited array/aperture size), and advantages (e.g., unrestricted motion, wide bandwidth) of biological sonar systems. The resulting system is easy to implem...

R. A. Altes

1999-01-01

474

Digital Image Processing Applied to Fluid Dynamic Problems.  

National Technical Information Service (NTIS)

Applications of visualization techniques associated with Digital Image Processing in fluid dynamics are discussed. Two typical fluid flow problems of interest for propulsion are selected to illustrate the purpose. The mixing properties of the jet are disc...

J. M. Buchlin

1986-01-01

475

Design of a distributed image processing and dissemination system.  

National Technical Information Service (NTIS)

The design and implementation of a distributed image processing and dissemination system was undertaken and accomplished as part of a prototype communication and intelligence (CI) system, the contingency support system (CSS), which is intended to support ...

P. Rafferty, L. Hower

1990-01-01

476

Image processing for flight crew enhanced situation awareness  

NASA Technical Reports Server (NTRS)

This presentation describes the image processing work that is being performed for the Enhanced Situational Awareness System (ESAS) application. Specifically, the presented work supports the Enhanced Vision System (EVS) component of ESAS.

Roberts, Barry

1993-01-01

477

Application of digital image processing techniques to astronomical imagery 1977  

NASA Technical Reports Server (NTRS)

Nine specific techniques of combination of techniques developed for applying digital image processing technology to existing astronomical imagery are described. Photoproducts are included to illustrate the results of each of these investigations.

Lorre, J. J.; Lynn, D. J.

1978-01-01

478

Optical image processing using the photoinduced anisotropy of pyrrylfulgide.  

PubMed

A synthesized photochromic compound-pyrrylfulgide--is prepared as a thin film doped in a polymethylmethacrylate (PMMA) matrix. Under irradiation by UV light, the film converts from the bleached state into a colored state that has a maximum absorption at 635 nm and is thermally stable at room temperature. When the colored state is irradiated by a linearly polarized 650 nm laser, the film returns to the bleached state; photoinduced anisotropy is produced during this process. Application of optical image processing methods using the photoinduced anisotropy of the pyrrylfulgide/PMMA film is described. Examples in non-Fourier optical image processing, such as contrast reversal and image subtraction and summation, as well as in Fourier optical image processing, such as low-pass filtering and edge enhancement, are presented. PMID:16477831

Menke, Neimule; Yao, Baoli; Wang, Yingli; Zheng, Yuan; Lei, Ming; Ren, Liyong; Chen, Guofu; Chen, Yi; Fan, Meigong; Li, Tiankai

2006-02-01

479

Connected Component Labeling in Image Processing with MIMD (Multiple Instruction, Multiple Data) Architectures.  

National Technical Information Service (NTIS)

Many higher level image processing algorithms suggest dynamic allocation of multiple processors to image processing subtasks. However, most parallel algorithms in image processing assume an SIMD (Single Instruction Multiple Data) architecture with process...

R. A. Hummel A. Rojer

1985-01-01

480

Halftoning processing on a JPEG-compressed image  

NASA Astrophysics Data System (ADS)

Digital image processing algorithms are usually designed for the raw format, that is on an uncompressed representation of the image. Therefore prior to transforming or processing a compressed format, decompression is applied; then, the result of the processing application is finally re-compressed for further transfer or storage. The change of data representation is resource-consuming in terms of computation, time and memory usage. In the wide format printing industry, this problem becomes an important issue: e.g. a 1 m2 input color image, scanned at 600 dpi exceeds 1.6 GB in its raw representation. However, some image processing algorithms can be performed in the compressed-domain, by applying an equivalent operation on the compressed format. This paper is presenting an innovative application of the halftoning processing operation by screening, to be applied on JPEG-compressed image. This compressed-domain transform is performed by computing the threshold operation of the screening algorithm in the DCT domain. This algorithm is illustrated by examples for different halftone masks. A pre-sharpening operation, applied on a JPEG-compressed low quality image is also described; it allows to de-noise and to enhance the contours of this image.

Sibade, Cedric; Barizien, Stephane; Akil, Mohamed; Perroton, Laurent

2003-12-01

481

Imaging implicit morphological processing: evidence from Hebrew.  

PubMed

Is morphology a discrete and independent element of lexical structure or does it simply reflect a fine-tuning of the system to the statistical correlation that exists among orthographic and semantic properties of words? Hebrew provides a unique opportunity to examine morphological processing in the brain because of its rich morphological system. In an fMRI masked priming experiment, we investigated the neural networks involved in implicit morphological processing in Hebrew. In the lMFG and lIFG, activation was found to be significantly reduced when the primes were morphologically related to the targets. This effect was not influenced by the semantic transparency of the morpho