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IEEE International Conference on Algorithms and Architectures for Parallel processing (ICAP)

作者： Oh-Young Kwon Tae-Geun Kim Tack-Don Han Sung-Bong Yang Shin-Dug Kim Distributed Computing Laboratory Systems Engineering Research Institute Taejon South Korea Parallel Processing System Laboratory Department of Computer Science Yonsei University Seoul South Korea

ISBN: (纸本)0780342291

In order to generate local addresses for an array section A(l:h:s) with block-cyclic distribution, an efficient compiling method is required. In this paper, two local address generation methods for the block-cyclic distribution are presented. One is a simple local address generation method that is modified from the virtual-block scheme. The other is a linear-time /spl Delta/M table construction method. The array elements of A(l:h:s) to be accessed at run-time build up a family of lines. By using the equation of the lines, a /spl Delta/M table can be generated in O(k) time. Experimental results show that a simple local address generation method has poor performance but a linear-time /spl Delta/M table generation method is faster than other algorithms in /spl Delta/M table generation time and access time for 10,000 array elements.

关键词： Runtime Equations Distributed computing Systems engineering and theory Parallel processing Laboratories computer science Parallel languages Upper bound Automata

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Real-time image processing using cascaded acousto-optic modulators

Real-time image processing using cascaded acousto-optic modu...

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IEEE Southeastcon

作者： D.B. Dunn Jiangang Xia Ting-Chung Poon P.P. Banerjee Optical Image Processing Laboratory The Bradley Department of Electrical Engineering Virginia Polytechnic Institute and State University VA USA Virginia Polytechnic Institute and State University Blacksburg VA US Center for Applied Optics Department of Electrical and Computer Engineering University of Alabama Huntsville Huntsville AL USA

We present a novel and simple cascaded acousto-optic image processing system to perform image processing. The system consists of two imaging lenses and two acousto-optic modulators that are placed in series. Real time image processing is achieved by Bragg diffraction. computer simulation is given and compared to an optical image processing system which uses a single acousto-optic modulator.

关键词： image processing Optical imaging Lenses Optical modulation Fourier transforms Transfer functions Equations Laboratories computer simulation Acoustic beams

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Three-dimensional analytical and numerical solutions for acousto-optic interaction

Three-dimensional analytical and numerical solutions for aco...

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Southeastern Symposium on System Theory

作者： D.B. Dunn M. McNeill Jiangang Xia Ting-Chung Poon P.P. Banerjee Optical Image Processing Laboratory The Bradley Department of Electrical Engineering Virginia Polytechnic Institute and State University VA USA Department of Elec. Engineering Bucknell University USA York University Canada Center for Applied Optics Department of Electrical and Computer Engineering University of Alabama Huntsville Huntsville AL USA

The authors present an analytical solution to the strong acousto-optic interaction problem in three dimensions. They then compare the analytical results to a split-step numerical algorithm. The algorithm is based on t... 详细信息

关键词： Optical propagation Acoustic beams Transfer functions Diffraction Acoustic propagation USA Councils Gratings image analysis image processing Laboratories

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Matching confidence analysis method based on tests of hypotheses

Matching confidence analysis method based on tests of hypoth...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Nong Sang Ruolin Wang Tianxu Zhang Institute for Pattern Recognition and Artificial Intelligence State E ducation Commission Laboratory for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan Hubei China Department of Civil Engineering Wuhan University of Hydraulic and Electrical Engineering Hubei China

ISBN: (纸本)0780340531

Matching confidence is an important element for evaluating image matching quality. A method is presented which uses the technique of tests of hypotheses to determine image matching confidence under a certain testing level. The authors use similarity measurement values to be the statistics. Experimental results with large real images prove the effectiveness of the method to determine image matching confidence.

关键词： Testing image matching Stereo image processing image reconstruction Statistics Navigation Remotely operated vehicles Pattern matching Layout Optimized production technology

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A model of deforestation by human population interactions

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Environmental and Ecological Statistics 1997年第1期4卷 83-92页

作者： Tanaka, Shojiro Nishii, Ryuei Faculty of Engineering Yamanashi University Kofu 400 4-3-11 Takeda Japan Fac. of Integrated Arts and Sciences Hiroshima University Higashi-Hiroshima 739 Japan Hiroshima University Japan Information Processing Center Hiroshima University Japan Department of Computer Science Faculty of Engineering Yamanashi University Japan Nagoya University Japan Department of Mathematics Hiroshima University Japan Fac. of Integrated Arts and Sciences Hiroshima University Japan University of Pittsburgh United States Institute of Statistical Mathematics Japan

A differential equation was employed in modelling deforestation by human population interactions to yield an explicit mathematical model. The theoretical relation and many possible models were applied to the grid cell data in Hiroshima Prefecture, and relative appropriateness of each model was evaluated by Akaike's information criterion (AIC) using raw data. Intensive further verification was executed by the bootstrap method. It was demonstrated that the theoretical relation was in the best agreement among many other models in comparison.

关键词： Akaike's information criterion Bootstrap method Deterministic model Error structure Model selection

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Performance enhancement in acousto-optic image processing

Performance enhancement in acousto-optic image processing

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IEEE Southeastcon

作者： P.P. Banejee D. Cao T.-C. Poon Dept. of Electr. & Comput. Eng. Alabama Univ. Huntsville AL USA Department of Electrical and Computer Engineering University of Alabama Huntsville Huntsville AL USA Optical Image Processing Laboratory The Bradley Department of Electrical Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

From the transfer functions of an acousto-optic (AO) cell, it is found that some basic image processing can be accomplished by using AO cells. Instead of frequency-plane filters, the AO cells are placed directly behind the object. The one dimensional edge enhancement results using one AO cell can be improved by using two acousto-optic cells which are put in tandem and with contra-propagating sound. The dominant second derivative operation obtained from the transfer function of the undiffracted order works like a one-dimensional Laplacian operator which enables improved edge enhancement.

关键词： image processing Numerical simulation Digital images image edge detection Propagation delay Laplace equations

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Some hypermedia ideas for the WWW

Some hypermedia ideas for the WWW

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Annual Hawaii International Conference on System sciences (HICSS)

作者： M. Bieber F. Vitali H. Ashman V. Balasubramanian H. Oinas-Kukkonen Institute for Integrated Systems Research NJ Center for Multimedia Research and NatE28099l Center for Transportation & Industrial Productivity New Jersey Institute of Technology Newark NJ USA Department of Computer Science University of Bologna Bologna Italy Information Technology Division Defence Science and Technology Organisation Salisbury SA Australia Rutgers University Newark NJ USA Dept of Info. Processing Science University of oulu Oulu Finland

World Wide Web (WWW) authors must cope in a hypermedia environment analogous to second-generation computing languages, building and managing all hypermedia links using simple anchors and single-step navigation. We present a set of third- and fourth-generation hypermedia functionalities, which WWW developers should consider. We ground our discussion in the hypermedia research literature, and illustrate both from existing implementations and a running scenario. We also give some direction for implementing these on the WWW.

关键词： World Wide Web Web sites Navigation Programming profession Multimedia systems Transportation computer industry Productivity computer science Information technology

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Joint Scene and Signal Modeling for Wavelet-Based Video Coding with Cellular Neural Network Architecture

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Journal of VLSI Signal processing Systems for Signal, image, and Video Technology 1997年第2-3期17卷 201-214页

作者： Chen, Chang Wen Luo, Jiebo Chen, Lulin Parker, Kevin J. Department of Electrical Engineering University of Missouri - Columbia Columbia MO 65211 United States Department of Electrical Engineering University of Rochester Rochester NY 14627-0231 United States Univ. of Sci. and Technol. of China China University of Southern California Los Angeles CA United States University of Illinois Urbana-Champaign IL United States Sign. and Image Processing Institute University of Southern California Los Angeles CA United States Coordinated Science Laboratory Beckman Institute University of Illinois Urbana-Champaign IL United States Natl. Ctr. Supercomputing Applic. Champaign IL United States Visualization Serv. and Devmt. Group United States Department of Electrical Engineering University of Rochester United States Imaging Science Research Labs. United States Department of Electrical Engineering University of Missouri Columbia MO United States IEEE SPIE Tau Beta Pi United States Univ. of Sci. and Technol. of China Hefei China University of Rochester NY United States Image Processing Laboratory NSF Ctr. for Electron. Imaging Syst. University of Rochester United States Joseph C. Wilson Ctr. for Technology Xerox Corporation Webster NY United States Imaging Sci. Technology Laboratory Eastman Kodak Imaging Res. Adv. D. Rochester NY United States IEEE SPIE United States East China Normal University China Shanghai Inst. of Technical Physics Chinese Academy of Sciences China Institute of Industrial Sciences University of Tokyo Japan SUNY Buffalo United States MIT United States Dept. of Elec. Eng. and Radiology Natl. Inst. of Gen. Medical Sciences United States IEEE Sonics Ultrasonics Symposium T. IEEE Acoustical Society of America Amer. Inst. of Ultrasound in Med. United States

This paper presents a joint scene and signal modeling for the design of an adaptive quantization scheme applied to the wavelet coefficients in subband video coding applications. The joint modeling includes two integrated components: the scene modeling characterized by the neighborhood binding with Gibbs random field and the signal modeling characterized by the matching of the wavelet coefficient distribution. With this joint modeling, the quantization becomes adaptive to not only wavelet coefficient signal distribution but also the prominent image scene structures. The proposed quantization scheme based on the joint scene and signal modeling is accomplished through adaptive clustering with spatial neighborhood constraints. Such spatial constraint allows the quantization to shift its bit allocation, if necessary, to those perceptually more important coefficients so that the preservation of scene structure can be achieved. This joint modeling enables the quantization to reach beyond the limit of the traditional statistical signal modeling-based approaches which often lack scene adaptivity. Furthermore, the dynamically enforced spatial constraints of the Gibbs random field are able to overcome the shortcomings of the artificial block division which are usually the major source of distortion when the video is coded by block-based approaches at low bit rate. In addition, we introduce a cellular neural network architecture for the hardware implementation of this proposed adaptive quantization. We prove that this cellular neural network does converge to the desired steady state with the suggested update scheme. The adaptive quantization scheme based on the joint scene and signal modeling has been successfully applied to videoconferencing application and very favorable results have been obtained. We believe that this joint modeling-based video coding will have an impact on many other applications because it is able to simultaneously perform signal adaptive and scene adaptiv

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On-line fingerprint verification

On-line fingerprint verification

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13th International Conference on Pattern Recognition, ICPR 1996

作者： Jain, Anil Hong, Lin Pattern Recognition and Image Processing Laboratory Department of Computer Science Michigan State University East Lansing MI 48824 United States

ISBN: (纸本)081867282X

We describe the design and implementation of an online fingerprint verification system which operates in two stages: (i) minutia extraction and (ii) minutia matching. An improved minutia extraction algorithm that is much faster and more accurate than our earlier algorithm has been implemented. For minutia matching, an alignment-based elastic matching algorithm has been developed. This algorithm is capable of finding the correspondences between input minutiae and the stored template without resorting to exhaustive search and has the ability to adaptively compensate for the nonlinear deformations and inexact pose transformations between finger prints. The system has been tested on two sets of finger print images captured with inkless scanners. The verification accuracy is found to be over 99% with a 15% reject rate. Typically, a complete fingerprint verification procedure takes, on an average, about 8 seconds on a SPARC 20 workstation. It meets the response time requirements of on-line verification with high accuracy. © 1996 IEEE.

关键词： Mathematical transformations

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Complexity optimization of adaptive RBF networks

Complexity optimization of adaptive RBF networks

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13th International Conference on Pattern Recognition, ICPR 1996

作者： Leonardis, Aleš Bischof, Horst Department for Pattern Recognition and Image Processing Technical University Vienna Treitlstraße 3/1832 A -1040 Vienna Austria University of Ljubljana Faculty of Computer and Information Science Computer Vision Laboratory Ljubljana Slovenia

ISBN: (纸本)081867282X

We propose an extension of RBF networks which includes a mechanism for optimizing the complexity of the network. The approach involves two procedures: adaptation (training) and selection. The first procedure adaptively changes the locations and the width of the centers of the basis functions and trains the linear weights. The selection procedure performs the elimination of some of the basis functions using an objective function. By iteratively combining these two procedures we achieve a controlled way of training and modifying RBF networks, which balances accuracy, learning time, and complexity of the resulting network. © 1996 IEEE.

关键词： Radial basis function networks

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