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IASTED International conference on parallel and distributed Computing and Networks, as part of the 23rd IASTED International Multi-conference on Applied Informatics

作者： Ventroux, Nicolas Blanc, Frédéric Lavenier, Dominique CEA-List DRT/DTSI/SARC Image and Embedded Computers Laboratory 91191 Gif-Sur-Yvette France IRISA CNRS Campus de Beaulieu 35042 Rennes Cedex France

Multi-Processor System-on-Chip (MPSoC) represents today the main trend for future architectural designs. Nonetheless, the scheduling of tasks on these distributed systems is a major problem since it has a central impact on global performances. This problem is known to be NP-complete and only approximate methods can be used. In the past, to approach optimal results, many heuristics have been proposed. But their complexity continue to increase, without considering efficient HW implementations. The novel scheduling policy, introduced in this paper, finds an interesting trade off between performance and complexity. Our list scheduling heuristic, called LLD, can near-optimally compute non-malleable tasks on multiple processing elements to minimize the schedule length with a low complexity. The comparison study achieved with already proposed algorithms shows that the LLD scheduling algorithm significantly overcomes the previous approaches in terms of processing element occupation as well as overall execution time.

关键词： Multiprocessing systems

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Embedded Fingerprint Verification System

Embedded Fingerprint Verification System

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International conference on parallel and distributed Systems (ICPADS)

作者： Gwo-Cheng Chao Shung-Shing Lee Hung-Chuan Lai Shi-Jinn Horng National Taiwan University Taipei Taiwan Department of Electrical Engineering Ching Yau University Taiwan Department of Computer Science Information Engineering National Taiwan University of Science and Technology Taipei Taiwan

Fingerprint verification is one of the most reliable personal identification methods in biometrics. In this paper, an effective fingerprint verification system is presented. We describe an enhanced fingerprint verification system consisting of image pre-processing, feature extraction and matching processes. Improved image pre-processing and broken ridge reconnection methods are proposed. In this paper, we also describe the design and implementation of a fingerprint verification system on SoC

关键词： Fingerprint recognition image matching Gray-scale Pixel Gabor filters Chaos Computer science Reliability engineering Computer network reliability Biometrics

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Efficiency on clusters of parallel simulation of sine-Gordon equation over hexagonal tessellation

Efficiency on clusters of parallel simulation of sine-Gordon...

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Euromicro conference on parallel, distributed and Network-Based processing

作者： J.C. Fabero A. Bautista L. Casasus Departmento Arquitectura de Computadores y Automática Facultad de Informática Universidad Complutense de Madrid Spain Departmento Matemática Aplicada Escuela Técnica Superior de Ingenieros Industriales Universidad Politécnica de Madrid Spain

Experiences in the parallel execution of a numerical method to simulate the sine-Gordon equation over two different clusters are presented in this paper. The nonlinear sine-Gordon equation has been discretized in a finite differences method based on hexagonal tesselation, and then parallelized using MPI for parallel execution on three workstation clusters, a Pentium iii PC based cluster using Gigabit Ethernet and Myrinet as interconnection networks, an Itanium2 based HP RX2600 cluster with Gigabit Ethernet, and a Prescott based PC cluster. Efficiency measurements over these clusters are also studied and compared.

关键词： Nonlinear equations Difference equations Computational modeling Finite difference methods Ethernet networks Josephson junctions Numerical simulation Workstations Multiprocessor interconnection networks SQUIDs

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Seamless image mosaic for multi-viewpoint overlapping pictures

Seamless image mosaic for multi-viewpoint overlapping pictur...

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International conference on parallel and distributed processing Techniques and Applications

作者： Liu, D He, XJ Dalian Maritime Univ Inst Naut Sci & Technol Dalian 116026 Peoples R China

ISBN: (纸本)1932415262

The mosaic method of the multi-viewpoint pictures provides a quick;practical means to obtain the multi-viewpoint panoramic image. It is a kind of image-based rendering methods, which joints the texture of real world images. In this paper an image geometrical mosaic model of the overlapping images is constructed, a smooth mosaic method is proposed, and an experimental result is given.

关键词： mosaic of multi-viewpoint image seamless image mosaic virtual environment image-based rendering

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Implementation of a parallel registration algorithm for registration of InSAR complex images

Implementation of a parallel registration algorithm for regi...

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conference on image and Signal processing for Remote Sensing X

作者： Lu, LJ Liao, MS Zhang, L Wang, Y Lin, H Wuhan Univ State Key Lab Informat Engn Surveying Mapping & R Wuhan 430079 Hubei Peoples R China

ISBN: (纸本)0819455202

Registration of two or more images of the same scene is an important procedure in InSAR image processing that seeks to extract differential phase information exactly between two images. Meanwhile, the efficiency for large volume data processing is also a key point in the operational InSAR data processing chain. In this paper, some conventional registration methods are analyzed in detail and the parallel algorithm for registration is investigated. Combining parallel computing model with the intrinsic properties of InSAR data, the authors puts forward an image parallel registration scheme over distributed cluster of PCs. The preliminary experiment will be implemented and the result demonstrates feasibility and effectiveness of the proposed scheme.

关键词： parallel processing parallel computing InSAR image registration image matching

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How pseudo model may help evaluate image compression on spiral architecture

How pseudo model may help evaluate image compression on spir...

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International conference on parallel and distributed processing Techniques and Applications

作者： Wang, HQ Hintz, T He, XJ Wu, Q Univ Technol Sydney Fac Informat Technol Dept Comp Syst Sydney NSW 2007 Australia

ISBN: (纸本)1932415262

Although Spiral Architecture (SA) has many advantages in image processing and machine vision, there is no available image capture device yet to support this structure. Hence, in order to implement our theoretical results, it is necessary to construct the SA from the existing image structure, on which the traditional image representation is based. Therefore, in this paper we provide two methods, Mimic model and Pseudo model. We can construct the architecture from the rectangular pixels and thus they share the Spiral addressing mechanism. This paper then presents how Pseudo model may help to evaluate the performance of image compression on Spiral Architecture. Based on the two unique properties of Spiral Architecture, i.e. locality of light intensity and uniformity of image partitioning, possible approaches to image compression may be discovered. Our future work would focus on partitioning the image into blocks and implement compression on the transform domain.

关键词： spiral architecture image compression pseudo model

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parallel reconstruction for parallel imaging space rip on cellular computer architecture

Parallel reconstruction for parallel imaging space rip on ce...

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Proceedings of the 16th IASTED International conference on parallel and distributed Computing and Systems

作者： Niu, Yanwei Hu, Ziang Gao, Guang R. Department of ECE University of Delaware Newark DE United States

The SPACE RIP technique is one of the parallel imaging methods that has the potential to revolutionize the field of fast MR imaging. The image reconstruction problem of SPACE RIP is a computation intensive task which needs to be parallelized to further reduce the reconstruction time. In this paper, we analyzed the algorithm and identified the program bottleneck to be parallelized. The loop level parallelization is implemented with Pthread, OpenMP and MPI. Furthermore, since the reconstruction uses Singular Value decomposition (SVD) to solve the matrix pseudoinverse problem, we implemented the one sided Jacobi parallel SVD on the state-of-art cellular computer architecture Cyclops64 to speedup the problem at the fine grain level.

关键词： parallel processing systems

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New grid scheduling and rescheduling methods in the GrADS project

New grid scheduling and rescheduling methods in the GrADS pr...

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Proceedings - 18th International parallel and distributed processing Symposium, IPDPS 2004 (Abstracts and CD-ROM)

作者： Cooper, K. Dasgupta, A. Kennedy, K. Koelbel, C. Mandal, A. Marin, G. Mazina, M. Mellor-Crummey, J. Berman, F. Casanova, H. Chien, A. Dail, H. Liu, X. Olugbile, A. Sievert, O. Xia, H. Johnsson, L. Liu, B. Patel, M. Reed, D. Deng, W. Mendes, C. Shi, Z. YarKhan, A. Dongarra, J. Computer Science Dept. Rice University Dept. of Computer Science University of California San Diego Dept. of Computer Science University of Houston Dept. of Computer Science University of Illinois ICL University of Tennessee

ISBN: (纸本)0769521320

The goal of the Grid Application Development Software (GrADS) Project is to provide programming tools and an execution environment to ease program development for the Grid. This paper presents recent extensions to the GrADS software framework: (1) A new approach to scheduling workflow computations, applied to a 3-D image reconstruction application;(2) A simple stop/migrate/restart approach to rescheduling Grid applications, applied to a QR factorization benchmark;and (3) A process-swapping approach to rescheduling, applied to an N-body simulation. Experiments validating these methods were carried out on both the GrADS MacroGrid (a small but functional Grid) and the MicroGrid (a controlled emulation of the Grid) and the results were demonstrated at the SC2003 conference.

关键词： Software engineering

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Computing the success factors in consistent acquisition and recognition of objects in color digital images by explicit preconditioning

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JOURNAL OF SUPERCOMPUTING 2004年第2期30卷 179-198页

作者： Maglogiannis, IG Zafiropoulos, EP Platis, AN Gravvanis, GA Univ Aegean Dept Informat & Commun Syst Engn GR-83200 Karlovassi Samos Greece Natl Tech Univ Athens Sch Elect & Comp Engn GR-15773 Athens Greece Hellen Open Univ Dept Comp Sci Patras Greece

The paper studies the factors influencing the consistent acquisition and recognition of object's color and border features in digital imaging. The proposed image acquisition process is utilized by a computer supported imaging system implementing the acquisition and analysis of skin lesion images supporting medical diagnosis. In addition the same approach may be used for several problems requiring reliable color measurement and object identification. Two methodologies are adopted: The Bayesian Networks, which provide an efficient way of reasoning under uncertainty and are used to incorporate the expert judgement into the estimation of the probability of successful operation, and a Markov chain approach, which is generally used for the dynamic modeling of the system behavior. The Markov chain model requires asymptotically the solution of sparse linear systems. Explicit preconditioned methods are used for the efficient solution of the derived sparse linear system, and the parallel implementation of the dominant computational part is exploited.

关键词： digital image acquisition camera calibration color measurement reproducibility computer vision Bayesian networks Markov modeling Markov Reward Models approximate inverses preconditioning parallel computations

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Computing the success factors in consistent acquisition and recognition of objects in color digital images by explicit preconditioning

Computing the success factors in consistent acquisition and ...

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International conference on parallel and distributed processing Techniques and Applications

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