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检索条件"任意字段=Parallel and Distributed Methods for Image Processing"

共 798 条记录，以下是581-590 订阅

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High-level design environment for massive parallel VLSI-implementations of statistical signal- and image processing models

High-level design environment for massive parallel VLSI-impl...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： S. Stilkerich J.K. Anlauf Image and Signal Processing Groupe EADS Corporate Research Center Munich Germany Institute of Computer Science II University of Bonn Bonn Germany

In this paper we introduce and describe a generic and semiconductor-technology independent hardware development environment for a class of statistical signal- and image processing models. The statistical signal- and image processing approach under consideration formally adopts the Bayesian paradigm and uses discrete Markov random field (MRF) models for the processing models to derive the joint distribution of signal- and image processing problems by means of mathematically and computationally tractable conditional distributions. We experimentally demonstrate and prove the capabilities respectively the concepts of the proposed high-level design environment by detailed chip layouts of different neighbourhood topologies and a single processing element of a MRF-architecture, which solves the image processing problem of noise removing, restoration and intensity-level preserving.

关键词： Signal design Signal processing image processing Mathematical model Hardware Bayesian methods Markov random fields distributed computing Topology Working environment noise

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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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International Symposium on parallel and distributed processing (IPDPS)

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

Summary form only given. 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. We present recent extensions to the GrADS software framework: 1. A new approach to scheduling workflow computations, applied to a 3D image reconstruction application; 2. A simple stop/migrate/restart approach to rescheduling grid applications, applied to a QR 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： Grid computing Application software Computer science distributed computing Contracts Processor scheduling Software tools Instruments Usability Runtime

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Design of DCS duplexer using SAW ladder filter

Design of DCS duplexer using SAW ladder filter

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IEEE International Symposium on Intelligent Signal processing and Communication Systems (ISPACS)

作者： Ru-Yue Lee Hung-Yu Lee Ruyen Ro Hsin-Yuan Tung Department of Electrical Engineering I-Shou University Kaohsiung Taiwan

ISBN: (纸本)0780386396

The frequency responses of SAW ladder filters, which consist of a one-port resonator in a parallel arm and one in a series arm, are investigated and their applications in designing a duplexer are also illustrated. The one-port resonators with apodized interdigital transducers and width-controlled reflection gratings are employed to increase the operating bandwidth as well as to suppress the effects of spurious modes. The transmission matrix method along with the image parameter method is applied to design the duplexer, which consists of two SAW ladder filters connected in parallel. Simulation results indicate that with a proper design of transmission line for impedance matching, a switchless duplexer with very low loss can be tailored using SAW devices.

关键词： distributed control Surface acoustic waves Resonator filters Transmission line matrix methods Frequency Transducers Reflection Gratings Bandwidth Impedance matching

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parallel deconvolution methods for three dimensional image restoration

Parallel deconvolution methods for three dimensional image r...

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Conference on Advanced Signal processing Algorithms Architectures and Implementations XIII

作者： Lewis, B Reichel, L LLC Rocketcalc Richfield OH 44286 USA

Restoration by deconvolution of three-dimensional images that have been contaminated by noise and spatially invariant blur is computationally demanding. We describe efficient parallel implementations of iterative meth... 详细信息

ISBN: (纸本)0819450782

关键词： image restoration ill-posed problem Krylov iterative methods parallel computation

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parallel and distributed methods for image processing IV

Parallel and distributed methods for image processing IV

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2000年

作者： Hongchi Shi Patrick C. Coffield Divyendu Sinha

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A divided-screenwise hierarchical compositing for sort-last parallel volume rendering

A divided-screenwise hierarchical compositing for sort-last ...

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International parallel and distributed processing Symposium, IPDPS 2003

作者： Ino, Fumihiko Sasaki, Tomomitsu Takeuchi, Akira Hagihara, Kenichi Graduate School of Information Science and Technology Osaka University 1-3 Machikaneyama Toyonaka Osaka560-8531 Japan Graduate School of Engineering Science Osaka University 1-3 Machikaneyama Toyonaka Osaka560-8531 Japan Toyota Motor Corporation Japan

ISBN: (纸本)0769519261

In this work, to render at least 5123 voxel volumes in real-time, we have developed a sort-last parallel volume rendering method for distributed memory multiprocessors. Our sort-last method consists of two methods, Hsu's (1993) segmented ray casting and our divided-screenwise hierarchical (DSH) compositing, in which each processor produces a subimage and merges all the produced subimages into the final image. This paper describes the DSH method, which aims at achieving high performance compositing on a large number of processors. Our implementation on a 64-node PC cluster can composite a 5122 pixel image about twice as fast as an existing method, the binary-swap method, so that can render a 512×512×224 voxel volume at approximately eight frames per second (fps). © 2003 IEEE.

关键词： Volume rendering

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Utilizing support vector machines for the characterization of digital dermatological images

Utilizing support vector machines for the characterization o...

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Proceedings of the International Conference on parallel and distributed processing Techniques and Applications

作者： Maglogiannis, Ilias Zafiropoulos, Elias P. University of the Aegean Dept. of Infor. and Comm. Syst. Eng. 83200 Karlovasi Greece Sch. of Electrical and Comp. Eng. National Technical Univ. of Athens 9 Iroon Polytecnheiou St. GR15773 Athens Greece

ISBN: (纸本)1892512416

In this paper we discuss an efficient methodology for the image analysis and characterization of digital images containing skin lesions. The methodology is based on the support vector machines algorithm for data classification and it has been applied to the problem of the recognition of malignant melanoma versus dysplastic nevus. Border and color based features were extracted from digital images of skin lesions acquired under reproducible conditions, using basic image processing techniques. Although larger sample sizes are necessary to resolve these issues fully, the support vector machines algorithm performed excellently achieving a high percentage of correct classification (approximately 100%). Two other classification methods, the statistical discriminant analysis and the application of neural networks were applied also to the same problem and their efficiency was compared with the support vector machines algorithm performance.

关键词： image processing

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International Symposium on parallel and distributed processing and Applications, ISPA 2003

International Symposium on Parallel and Distributed Processi...

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International Symposium on parallel and distributed processing and Applications, ISPA 2003

ISBN: (纸本)9783540376194

The proceedings contain 43 papers. The special focus in this conference is on Applications on Web-Based, Intranet Systems, Optimization Techniques, Performance Evaluation of parallel Systems and Wireless Communication. The topics include: Localized algorithms and their applications in ad hoc wireless networks;towards a single system image for high-performance java;reliability of a distributed search engine for fresh information retrieval in large-scale intranet;a web-based graphical interface for general-purpose high-performance computing clusters;a compressed diagonals remapping technique for dynamic data redistribution on banded sparse matrix;scheduling parallel tasks onto NUMA multiprocessors with inter-processor communication overhead;an efficient algorithm for irregular redistributions in parallelizing compilers;balancing traffic in meshes by dynamic channel selection;an ad hoc on-demand routing protocol with alternate routes;design of a viable fault-tolerant routing strategy for optical-based grids;direct execution simulation of mobile agent algorithms;mpi-2 support in heterogeneous computing environment using an score cluster system;internet traffic congestion modelling and parallel distributed analysis;a comparative investigation into optimum-time synchronization protocols for a large scale of one-dimensional cellular automata;impact from mobile spam mail on mobile internet services;solving the set-splitting problem in sticker-based model and the Adleman-Lipton model;parallel MCGLS and ICGLS methods for least squares problems on distributed memory architectures;effective admission control for real-time anycast flow;a comprehensive software distributed shared memory system and a scheme of interactive data mining support system in parallel and distributed environment.

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Transform-based image compression by noise reduction and spatial modification using Boolean minimization

Transform-based image compression by noise reduction and spa...

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IEEE Workshop on Statistical Signal processing, SSP 2003

作者： Agauan, S.S. Baran, T.A. Panetta, K.A. University of Texas at San Antonio Electrical Engineering 6900 Noah Loop San AntonioTX78249-0665 United States Tufts University Electrical and Computer Engineering 161 College Avenue MedfordMA02155 United States

ISBN: (纸本)0780379977

A method for the lossy compression of multivalued images using transform-based Boolean minimization is described. Blocks in bit-planes of an image are minimized, and the results of these minimizations are used to detect and reduce noise (sandy regions) and spatial complexity in the blocks. Specifically, the techniques of "minterm uniformalization" and "minterm quantization and thresholding" are presented as methods of discarding perceptually insignificant information from a minimized representation of an image and use data readily available from minimization without the calculation of complicated measures. Experimentally, results comparable to JPEG and better than existing binary techniques can be expected. Fast algorithms may be used, no multiplications are required, and decompression is performed without an inverse transform. Therefore, an emphasis is placed on the use of these algorithms for low-complexity or very high-speed hardware implementations for communications, for distributed and parallel sensor and computing applications, as well as for database storage. © 2003 IEEE.

关键词： image coding

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Proceedings International parallel and distributed processing Symposium

Proceedings International Parallel and Distributed Processin...

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International Symposium on parallel and distributed processing (IPDPS)

The following topics are dealt with: Grid and distributed computing; scheduling task systems; shared-memory multiprocessors; imaging and visualization; testing and debugging; performance analysis and real-time systems; scheduling for heterogeneous resources; networking; peer-to-peer and mobile computing; compiler technology and run-time systems; load balancing; network routing; parallel programming models; parallel algorithms; scheduling and storage; parallel and distributed performance; software for high performance clusters; decentralized algorithms; multithreading and VLIW; parallel and distributed real-time systems; high-level parallel programming models and supportive environments; Java for parallel and distributed computing; nature inspired distributed computing; high performance computational biology; advances in parallel and distributed computational models; reconfigurable architectures; communication architecture for clusters; next generation systems; fault-tolerant parallel and distributed systems; wireless, mobile and ad hoc networks; parallel and distributed image processing, video processing, and multimedia; formal methods for parallel programming; Internet computing and e-commerce; parallel and distributed scientific and engineering computing with applications; massively parallel processing; performance modeling, evaluation, and optimization of parallel and distributed systems; and parallel and distributed systems: testing and debugging.

关键词： Processor scheduling Shared memory systems Software debugging Software testing Real time systems Program compilers Resource management parallel programming parallel algorithms Memory management parallel architectures Biomedical computing Reconfigurable architectures Computer fault tolerance Video signal processing image processing Software requirements and specifications Multimedia computing Internet

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