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

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parallel deconvolution methods for three dimensional image restoration

Parallel deconvolution methods for three dimensional image r...

引用

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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A web-based distributed image processing system

A web-based distributed image processing system

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4th Internet Imaging Conference

作者： Han, CY Chen, H He, L Wee, WG Univ Cincinnati Dept Elect & Comp Engn & Comp Sci Cincinnati OH 45221 USA

ISBN: (纸本)0819448184

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.

关键词： internet web-based image processing distributed application Java UML XML CORBA JNI

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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...

引用

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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parallel detection of regulatory elements with gMP

Parallel detection of regulatory elements with gMP

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International Symposium on parallel and distributed processing (IPDPS)

作者： B. Schmidt Lin Feng A. Laud Y. Santoso School of Computer Engineering Nanyang Technological University Singapore Helixense Private Limited Singapore

The detection of regulatory elements from a large set of regulatory regions is a challenging problem in computational genomics. However, computational methods to extract this biologically meaningful information suffer from high computational requirements. In this paper we present a parallel algorithm to detect regulatory elements using correlation with gene expression data and its implementation with gMP. gMP is a new purely Java-based interface that adds MPI-like message-passing and collective communication to the genomics Research Network Architecture (gRNA). The parallel implementation leads to significant runtime savings on our distributed gRNA system.

关键词： Bioinformatics Genomics Biology computing Gene expression distributed processing image analysis image sequence analysis Displays Java Computer architecture

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Iso-splatting: A point-based alternative to isosurface visualization 11

Iso-splatting: A point-based alternative to isosurface visua...

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11th Pacific Conference on Computer Graphics and Applications

作者： Co, CS Hamann, B Joy, KI Univ Calif Davis Dept Comp Sci CIPIC Davis CA 95616 USA

ISBN: (纸本)0769520286

We present a new approach to isosurface visualization that we call "iso-splatting." We use point primitives for representing and rendering isosurfaces. The method consists of two steps. In the first step, point samples are generated throughout the volumetric domain of a scalar function. In the second step, these points are projected onto the isosurface of interest. We render the resulting point set using a surface splatting algorithm. The method can be extended to out-of-core or parallel environments. Our results show that this method can offer much greater time and space efficiency when compared with standard triangle-based methods, thereby supporting higher levels of interactivity. Parts of the algorithm can be accelerated using graphics hardware. One key advantage of this approach is that, since extraction computations are divided into two smaller phases, work can be distributed to exploit all available resources.

关键词： Acceleration Computational geometry Computer science Fuels Graphics Hardware image processing Isosurfaces Rendering (computer graphics) Visualization

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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 Symposium on parallel and distributed processing (IPDPS)

作者： F. Ino T. Sasaki A. Takeuchi K. Hagihara Graduate School of Information Science and Technology Osaka University Japan Graduate School of Engineering Science Osaka University Japan Toyota Motor Corporation Japan

In this work, to render at least 512/sup 3/ 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 512/sup 2/ pixel image about twice as fast as an existing method, the binary-swap method, so that can render a 512/spl times/512/spl times/224 voxel volume at approximately eight frames per second (fps).

关键词： Rendering (computer graphics) Casting image segmentation Visualization X-ray imaging Computed tomography High performance computing Information science Pixel Biomedical imaging

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