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

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distributed image processing tool for a WindowsNT network

Distributed image processing tool for a WindowsNT network

引用

conference on parallel and distributed methods for image processing

作者： Fung, YF Heung, TH Ercan, MF Hong Kong Polytechnic Univ. (Hong Kong)

ISBN: (纸本)0819425885

distributed computing provides a cost-effective solution for computation intensive problems. With the emerging of networking operating system for personal computer (PC), such as WindowsNT, it is now feasible to develop distributed computing on a network of PCs. In addition, the computing power delivered by a PC is kept increasing whilst the cost is decreasing. Implying that the performance/cost factor for a PC is high and tile computing power delivered by the network is enormous. In this paper, we describe a software system which enables users to develop distributed computing program using the SPMD (Single Program Multiple Data) paradigm very quickly under the WindowsNT operating system. The programming model for the system is simple and a user can control the system through a graphical interface. The results show that our system provides a reasonable speedup in solving image processing problems.

关键词： image processing distributed programming fast ethernet

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parallel implementation of a multiresolution image decomposition algorithm using A(3) methodology

Parallel implementation of a multiresolution image decomposi...

引用

conference on parallel and distributed methods for image processing

作者： Assouil, M Deforges, O Kpalma, K Institut National des Sciences Appliquees de Rennes (France)

ISBN: (纸本)0819425885

The use of multiprocessor systems is a well suited solution to handle the problem of implementing realtime image processing applications. We use a multiresolution image decomposition algorithm to show how the A(3) methodology (Algorithm Architecture Adequation), and the CAD software SynDEx which support it, may improve the implementation of such algorithms on a multi-DSP architecture. The application algorithm as well as the hardware are specified with graphs, then the implementation may be formalized in terms of graphs transformations. This methodology reduces significantly the development cycle of image processing applications, by simplifying test and debug process.

关键词： multi-DSP systems algorithm architecture efficient matching multiresolution morphological processing

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parallel volume rendering using the BSP model

Parallel volume rendering using the BSP model

引用

conference on parallel and distributed methods for image processing

作者： Xie, H Li, WQ Murdoch Univ. (Australia) Univ. of Western Australia (Australia)

ISBN: (纸本)0819425885

We present a new parallel volume rendering algorithm based on the split-light model for rendering and the Bulk Synchronous parallel (BSP) model for parallelization. The BSP model provides a simple and architecture-independent approach to structure the parallel program. This parallel program has been tested on a shared memory SGI PowerChallenge machine, a distributed memory IBM SP2 machine and a network of UNIX workstations.

关键词： BSP model volume rendering parallel algorithm architecture-independent parallel programming

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Associative architecture for image processing

Associative architecture for image processing

引用

conference on parallel and distributed methods for image processing

作者： Adar, R Akerib, A Associative Computing Ltd. (Israel)

ISBN: (纸本)0819425885

This article presents a new generation in parallel processing architecture for real-time image processing. The approach is implemented in a real time image processor chip, called the Xium(TM)-2, based on combining a fully associative array which provides the parallel engine with a serial RISC core on the same die. The architecture is fully programmable and can be programmed to implement a wide range of color image processing, computer vision and media processing functions in real time. The associative part of the chip is based on patented pending methodology of Associative Computing Ltd. (ACL), which condenses 2048 associative processors, each of 128 ''intelligent'' bits. Each bit can be a processing bit or st memory bit. At only 33 Mhz and 0.6 micron manufacturing technology process, the chip has It computational power of 3 Billion ALU operations per second and 66 Billion string search operations per second. The fully programmable nature of the Xium(TM)-2 chip enables developers to use ACL tools to write their own proprietary algorithms combined with existing image processing and analysis functions from ACL's extended set of libraries.

关键词： parallel processing associative memory associative processing real-time image processing machine vision

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Communication in a large DSP array for image processing

Communication in a large DSP array for image processing

引用

conference on parallel and distributed methods for image processing

作者： Ercan, MF Fung, XF Demokan, MS Hong Kong Polytechnic Univ. (Hong Kong)

ISBN: (纸本)0819425885

The communication overhead in many multiprocessor computing platform is a critical factor over performance. In this paper we will present communication performance of a large processing array built with TI 320C40 DSPs. Inter-processor communication is provided by message passing which is a common method used in multiprocessors systems. The system is developed for image processing therefore transmission of large data blocks and various forms of communication are required frequently. The processor used in this system has six built in communication links. They are X-bit, bi-directional links with a speed of 20 Mbytes/sec. A processing array built with these processors employs MIMD paradigm and static interconnection. In this paper, the communication performance of such DSP network is investigated and performance results are presented. The communication functions include broadcasting, scattering, gathering and point to point transmission of messages.

关键词： inter processor communication distributed memory systems parallel processing

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Distribution of image processing applications on a heterogeneous workstation network. Modeling, load-balancing and experimental results.

Distribution of image processing applications on a heterogen...

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conference on parallel and distributed methods for image processing

作者： HernandezSosa, D CabreraGamez, J Univ. de Las Palmas de Gran Canaria (Spain)

ISBN: (纸本)0819425885

This work analyzes the computation distribution in applications generated by a multilevel knowledge-based system for image processing called SVEX.(1) This distribution has been carried out on a heterogeneous workstation network, trying to take advantage of the availability and frequent infra-utilization of this computational resource. The parallelization is based on message-passing tool parallel Virtual Machine (PVM).(2) Firstly SVEX and its computational scheme are described, detailing the structure of the first level (the Pixel Processor). Then different distribution paradigms are studied, selecting for its implementation the parallelism based on the data. Considering this alternative, the research addresses two fundamental problems: analysis of basic load-balancing schemes and obtaining-a model for predicting parallelization behavior as new machines are added to the computational network. The results produced in a series of experiments permit the comparison of load-balancing schemes and the validation of the proposed model. The experiments include the processing of both static images and sequences.

关键词： knowledge based vision systems (KBVS) parallel Virtual Machine (PVM) distributed image processing load-balancing

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Implementation of two-dimension FFT on massively parallel processing system DAWN1000

Implementation of two-dimension FFT on massively parallel pr...

引用

conference on parallel and distributed methods for image processing

作者： Wang, YT Wang, ZS Institute of Electronics (China)

ISBN: (纸本)0819425885

Two-dimensional (2D) Discrete Fourier Transform (DFT) frequently needs to be performed in the digital image processing. Although the computing time of 2D DFT can be dramatically reduced by using 2D Fast Fourier Transform (FFT), the processing speed of a very large array is yet intolerable. The development of parallel processing system promotes the application of 2D FFT. In this paper, we present the implementation of 2D FFT as a general procedure by row-column method and vector-radix method based on a general-purpose massively parallel processing system-DAWN 1000 developed in China. Even though the 2D FFT has parallel characteristics in nature, the requirement of corner-turning and the existence of data communication make its implementation more complicated. We analyze the impact of the machine capacity and the computing complexity on the algorithm efficiency and evaluate the implementation in terms of the arithmetic operations as well as the data transfer. The comparison of the two methods shows the fact that each method has its own advantages and disadvantages. Combining their traits, we design a new implementation algorithm concerning its flexibility, the efficiency and the complexity of the communication. As an example, we fulfill the spaceborne SAR image processing by using the new approach.

关键词： parallel processing MPP row-column algorithm vector-radix algorithm block algorithm two-dimensional FFT SAR image processing

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Block rotation: Implementation and applications

Block rotation: Implementation and applications

引用

conference on parallel and distributed methods for image processing

作者： Fatemi, O Panchanathan, S Univ. of Ottawa (Canada) Univ. of Ottawa (United States)

ISBN: (纸本)0819425885

Visual media processing is becoming increasingly important because of the wide variety of image and video based applications. Block rotation is an important operation in different image/video processing tasks such as graphics, fractal processing, pattern matching and image registration. Remote sensing, medical imaging, computer vision, computer graphics, and video coding are typical applications of digital image rotation. However, a hardware implementation of the block rotation algorithm has not been realized and software implementation is slow. Hence, they are not suitable for real-time execution. In this paper, we propose a novel method for block rotation, which is fast and suitable for hardware implementation. The algorithm employs area based interpolation. Experimental results have shown the performance enhancement compared to classical interpolation algorithms at a similar level of complexity.

关键词： image rotation spatial transformation affine transform interpolation forward mapping and backward mapping

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Interlayer communication mechanisms for a heterogeneous image processing system

Interlayer communication mechanisms for a heterogeneous imag...

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conference on parallel and distributed methods for image processing

作者： Lau, WC Fung, FY Ercan, MF Hong Kong Polytechnic Univ. (Hong Kong)

ISBN: (纸本)0819425885

A heterogeneous system for image processing was designed. The system consists of two layers with an array of DSPs in the low level layer and an array of PCs in the high level layer. The system resembles two stage multi-layers architecture. In the preprocessing phase, image data is delivered to the low level processors and operations are handled by using SPMD paradigm. The processed data is delivered to the high level processors where feature extraction and recognition tasks are performed. Apparently, the performance of this system is highly depended on communication mechanism used. The communication between two heterogeneous processing layers is a critical design issue and will be described in this paper. In our design, we have employed QuickRing. QuickRing provides a high transfer rate, 160Mbytes/s, and supports Multicast mode of data transmission that is suitable for broadcasting of data.

关键词： QuickRing heterogeneous Multicast performance analysis

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Volume rendering using parallel algebraic logic (PAL) hardware

Volume rendering using parallel algebraic logic (PAL) hardwa...

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conference on parallel and distributed methods for image processing

作者： Li, HZ Shi, HC Coffield, PC Univ. of Missouri/Columbia (United States) Air Force Wright Lab. (United States)

ISBN: (纸本)0819425885

In this paper, we present the implementation of a volume graphics rendering algorithm using shift-restoration operations on parallel algebraic logic (PAL) image processor. The algorithm is a parallel ray casting algorithm. In order to eliminate shading artifacts caused by inaccurate estimation of surface normal vectors, we use gray level volume instead of binary volume, and apply a low pass filter to smooth the volume object surfaces. By transforming the volume to an intermediate coordinate system to which there is a simple mapping from the object coordinate system, we solve the data redistribution problem caused by nonregular data access patterns in volume rendering. It has been proved very effective in reducing the data communication cost of the rendering algorithm on the PAL hardware.

关键词： volume rendering parallel algorithm mesh processor array

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