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New encouragement on cartographic visualisation

New encouragement on cartographic visualisation

引用

International symposium on image and Signal processing and Analysis

作者： S. Franges R. Zupan Faculty of Geodesy University of Zagreb Zagreb Croatia

ISBN: (纸本)9539676940

The most important changes in cartography are connected with the development of computer technology and GIS, and with regard to the function and usage of maps, the accent is given to cartographic visualisation. New encouragement to the visualisation of various databases, that are directly connected with the space, comes from multimedia presentations, animation, Internet, WWW etc.

关键词： Data visualization Visual databases Space technology image databases Multimedia databases graphics Geodesy Geophysics computing Geographic Information Systems Animation

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Virtual dissection of the colon based on helical CT data-can it be done?

Virtual dissection of the colon based on helical CT data-can...

引用

International symposium on image and Signal processing and Analysis

作者： E. Sorantin E. Balogh A. Vilanova i Bartroli K. Palagyi L.G. Nyul Department of Radiology University of Graz Graz Austria Department of Informatics University of Szeged Szeged Hungary Institute of Computer Graphics and Algorithms University of Technology Vienna Vienna Austria

ISBN: (纸本)9539676940

Colorectal cancer is the third most commonly diagnosed cancer; and colonic polyps are known precursors of that particular cancer. Virtual dissection refers to a display technique for polyp detection based on helical CT data, where the colon is dissected and flattened as on the pathologist's table. The approach and image processing as well as the early experience are described in this paper.

关键词： Colonography Colon Computed tomography Cancer Colonic polyps Informatics image reconstruction Humans Hospitals image processing

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A display system for health risks from radiation visualized by CG technology

A display system for health risks from radiation visualized ...

引用

International symposium on Signal processing and Its Applications (ISSPA)

作者： M. Katagiri Y. Tuzuki M. Kitaichi S. Sawamura Y. Aoki Graduate School of Engineering Hokkaido University Sapporo Japan

Defined as the ability to integrate with three-dimensional, interactive, computer-generated environments, the technology of computer graphics (CG) has proven to be a valuable tool for a broad variety of fields, including nuclear engineering. As the application of CG to nuclear engineering, this study proposed a display system in which the health risks from ionizing particles were visualized by CG. The user can see the risk information of the specified organs using the organ select panel in the input part as well as that of the whole body and radiation distribution. The system uses a server and client system and consists of three parts in the server, the simulation part, the visualization part and the database, and the input-output part in the client. The system is useful for a broad range of activities including radiation protection, radiation management, nondestructive assay, waste management, dose minimization, space exploration and medical imaging.

关键词： Visualization Character generation computer displays Waste management Three dimensional displays computer graphics Application software Ionizing radiation Medical simulation image databases

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A high-speed image acquisition system based on state machine and fast ADCs

A high-speed image acquisition system based on state machine...

引用

IEEE symposium on Nuclear Science (NSS/MIC)

作者： H.P. Lima A.F. Barbosa G.P. Guedes P.C.M.A. Farias L.M. de Andrade Filho Detection Systems Laboratory Brazilian Center for Physics Research Brazil

The present work reports on the development of a digital system for image acquisition which is able to process two electric signals of amplitude varying between 0 and 10 V. The system correlates both signals in a two-dimensional histogram. X and Y coordinates for every event are derived from the amplitudes of the two coincident signals. The hardware basically consists of two analog-to-digital converters (ADCs), control electronics, and one 1M Static Random Access Memory (SRAM), implemented in a card that is plugged into any personal computer with an ISA bus. The data acquisition rate may be as high as 1.0 /spl times/ 10/sup 6/ events per second, and does not depend on the PC processor. The software code has been written in the Delphi environment using assembly routines. image sizes may be chosen from 128 /spl times/ 128 to 1024 /spl times/ 1024 pixels and may be viewed in three-dimensional graphics. images are shown to illustrate the applicability to two-dimensional position sensitive X-ray detectors.

关键词： Signal processing Digital systems Histograms Hardware Analog-digital conversion SRAM chips Random access memory Microcomputers Instruction sets Data acquisition

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To a problem on components operation of a distributed system for image processing and analysis

To a problem on components operation of a distributed system...

引用

International Forum on Strategic Technology, IFOST

作者： A.N. Kolomoets V.A. Ovcherenko Novosibirsk State Technical University Novosibirsk Russia

The modern tasks of processing and analysis of large scale arrays of graphics information demand real-time operation and considerable computational resources. The ideology of developing such systems does not fit the increasing requirements and does not involve the possibilities of these computational resources. Classifications of such systems and their architectures are conducted. The advantages and disadvantages of existing solutions are detected. New goals and tasks are considered, and research directions in the field are pointed out. The alternative system structure for large distributed graphical information array processing, modes of implementation of data exchange processes between separate components of this system, and methods of integration with existing information storage and visualization tools are offered. The main component of the tendered system architecture is the intelligent computing core realizing the principle of an expert system. The feature of its operation is encompassed by using a self-learning mode during operation. It allows not only to improve the quality of automatic processing, and to use expert knowledge, but also to accumulate its own experience. Possible application areas of such a system are considered.

关键词： image processing image analysis image storage Software libraries Software tools Information analysis graphics computer architecture Expert systems Availability

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Mathematics foundations for signal processing system synthesis through generalized Fibonacci interconnection topologies

Mathematics foundations for signal processing system synthes...

引用

International symposium on image and Signal processing and Analysis

作者： R.S. Stankovic M. Stankovic J. Astola K. Egiazarian Department of Computer Science Nis Serbia Int. Center for Signal Processing Tampere University of Technology Tampere Finland

ISBN: (纸本)9539676940

We extend various bit-level and word-level expressions for representation of switching functions, such as SOP, Reed-Muller expressions, arithmetic, and Walsh expressions, to functions used in Fibonacci interconnection topologies. The corresponding Fibonacci decision diagrams (FibDD) are used as graphic representations of these expressions. At the same time, FibDD are used as a data structure to efficiently calculate coefficients in the introduced expressions, and to perform design of related networks. In this way, we provide a base to extend the application of powerful CAD design tools for switching functions to functions in Fibonacci interconnection topologies.

关键词： Mathematics Signal processing Signal synthesis Network topology Data structures Power system interconnection graphics Boolean functions Circuit topology computer science

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Arbitrarily scalable edge-preserving interpolation for 3-D graphics and video resizing

Arbitrarily scalable edge-preserving interpolation for 3-D g...

引用

IEEE International symposium on Circuits and Systems (ISCAS)

作者： Yuan-Chung Lee Chein-Wei Jen Department of Electronics Engineering National Chiao Tung University Hsinchu Taiwan

ISBN: (纸本)0780366859

Arbitrary scaling is an essential operation in texture filtering of real-time 3-D graphics and video resizing. Conventional schemes do not consider the characteristics of the source contents, so that the sharpness of edges cannot be retained. In this paper, we propose an edge-preserving interpolation algorithm that can perform arbitrary scaling. The algorithm utilizes a band-split approach with weighted selection direction interpolation. With this algorithm, the edges and details are much sharper and more proper for human perception. The required memory bandwidth (the bottleneck of current high-performance 3-D graphics) for texture access is still similar to the conventional schemes.

关键词： Interpolation computer graphics Filtering algorithms Humans Convolution Kernel Anisotropic magnetoresistance Anisotropic filters Video sharing image processing

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DDDDRRaW: A prototype toolkit for distributed real-time rendering on commodity clusters

DDDDRRaW: A prototype toolkit for distributed real-time rend...

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International symposium on Parallel and Distributed processing (IPDPS)

作者： T.D. Nguyen C. Peery J. Zahorjan Department of Computer Science Rutgers University Piscataway NJ USA Department of Computer Science & Engineering University of Washington Seattle WA USA

ISBN: (纸本)0769509908

We describe DDDDRRaW, a prototype toolkit for distributed real-time rendering on commodity clusters. In constrast to most work on cluster computing, DDDDRRaW supports a repeated, low-latency computation, the drawing of frames which must take place on a time scale of 30-100 ms. DDDDRRaW employs image layer decomposition, a rendering-specific work partitioning algorithm described and evaluated using simulation. In this paper we address implementation issues. In particular, one important issue we explore is how to exploit the potential parallelism afforded by the multiple hardware resources of each node: the CPU, the network adapter and the video card. We evaluate DDDDRRaW's live performance on two small workstation clusters representing different points in the technology spectrum. Our results show that DDDDRRaW effectively exploits cluster resources to improve real-time rendering performance and should scale well to moderately sized clusters.

关键词： Prototypes Rendering (computer graphics) Hardware Layout computer science Peer to peer computing Workstations Personal communication networks graphics Delay

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Medical image processing, Analysis and Visualization in clinical research

Medical Image Processing, Analysis and Visualization in clin...

引用

Annual IEEE symposium on computer-Based Medical Systems

作者： M.J. McAuliffe F.M. Lalonde D. McGarry W. Gandler K. Csaky B.L. Trus CBEL Center for Information Technology National Institutes of Health DHHS Bethesda MD USA Geriatric Psychiatly Branch National Institutes of Mental Health Bethesda MD USA Laboratory of lmmunology National Eye Institute National Institutes of Health DHHS Bethesda MD USA

Imaging has become an essential component in many fields of medical and laboratory research and clinical practice. Biologists study cells and generate 3D confocal microscopy data sets; virologists generate 3D reconstructions of viruses from micrographs; radiologists identify and quantify tumors from MRI and CT scans; and neuroscientists detect regional metabolic brain activity from PET and functional MRI scans. Analysis of these diverse image types requires sophisticated computerized quantification and visualization tools. Until recently, 3D visualization of images and quantitative analysis could only be performed using expensive UNIX workstations and customized software. Today, much of the visualization and analysis can be performed on an inexpensive desktop computer equipped with the appropriate graphics hardware and software. This paper introduces an extensible, platform-independent, general-purpose image processing and visualization program specifically designed to meet the needs of an Internet-linked medical research community. The application, named MIPAV (Medical image processing, Analysis and Visualization), enables clinical and quantitative analysis of medical images over the Internet. Using MIPAV's standard user interface and analysis tools, researcher and clinicians at remote sites can easily share research data and analyses, thereby enhancing their ability to study, diagnose, monitor and treat medical disorders.

关键词： Biomedical image processing image analysis Data visualization Biomedical imaging Medical diagnostic imaging Magnetic resonance imaging Performance analysis Software performance Internet Laboratories

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Counterpropagation neural networks for trademark recognition

Counterpropagation neural networks for trademark recognition

引用

International symposium on Signal processing and Its Applications (ISSPA)

作者： M.F. Zafar D. Mohamad Faculty of Computer Science & Information Systems University of Technology Malaysia

This work considers the possibility of using the connected component algorithm for segmentation to extract the features inherent in the studied objects and counterpropagation neural networks (CPN) for the learning capability for object recognition. Neural networks do not need any mathematical model to determine the system output depending upon the given inputs. Instead they behave as model free estimators and their output is closest to the already "learned" patterns. Neural networks have conventionally been used for a variety of automatic target detection, character recognition, control etc., but in the case of multiple integrated object matching, such as trademarks, solutions have yet to be found due to the complex mixture of graphics and texts comprised in the logo. CPN operates on the principle of closeness in the n-dimensional Euclidian space. Very encouraging results are observed.

关键词： Counting circuits Neural networks Trademarks Feature extraction image segmentation Shape measurement Signal processing algorithms computer science Information systems Data mining

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