Finally , a new performance model of multi - dsp system architecture and task allocation and schedule is presented in virtue of distributed finite state machine ( dfsm ) and vhdl environment . chapter 1 gives a comprehensive description about the significance of research and the current research status of real - time dsp , parallel processing , fpga co - processor and vxi virtual instrument technology 第?章绪论部分阐述了选题的意义，介绍了高性能信息处理领域内实时信号处理技术、并行处理技术、 fpga技术和vxi总线技术的研究与发展现状，并介绍了课题提出的背景与主要研究内容与任务。
It includes parallel architectures , parallel software and parallel algorithm , etc . because the number of data in image processing is very huge , and the existence of convolution operation and matrix multiplication , it is possible that parallel algorithm design and implement can be used in image processing 并行处理技术领域非常广泛,包括并行体系结构、并行软件和并行算法等。由于图像处理过程中的数据量巨大,而且各种算法中大量卷积运算和矩阵乘法运算的存在,就为图像处理过程中的并行算法设计和实现提供了可能。
Second , a parallel adaptive ray - casting algorithm for graphic rendering of cfi is developed . in the computational model of cfi , the line - of - sight integration is difficult to obtain for 3d complicated flow field , because curvilinear grids , multizone curvilinear grids , and other irregular grids that are commonly used in computational fluid dynamics ( cfd ) present interesting challenges , such as the complex shapes of cell regions defined by grid points ; the wide variation in the sizes of cells in different regions of the grid ; and the intersecting or overlapping nature of multi - grids . the parallel adaptive ray - casting algorithm is extremely efficient to solve these problems 并行自适应光线投射法继承了光线投射法适合于任何形式网格的优点；光线与计算网格的交点自适应地反映了原来网格点物理量的分布，能够与数值计算的精度保持一致；图像平面的自适应算法使我们不必从每一个像素发出射线，既提高了光线投射法的计算效率，同时又保证重采样后激波这样的高频信息不会损失；将并行处理技术引入计算光学流动图像生成过程，解决了大规模数值模拟结果的处理对计算速度和内存容量的需求。
In this thesis , lots of research has been done on the key technologies such as parallel processing , fpga design & reconfiguration , real - time bus - based platform , based on the national key project " research on automatic measurement system & equipment technology " . firstly a multi - functional vxi platform named vvp ( vxi versatile plug - in platform ) , which supports multi - dsp ( digital signal processor ) parallel processing , is proposed with in - depth research on the actual technology of real - time dsp ( digital signal processing ) and vxi virtual instrument 本文以国家“九五”重点科技攻关项目97 - 772 “自动测试系统与设备技术的研究”为背景，对并行处理技术、 fpga技术、实时总线技术等构建高性能信息处理系统的核心技术进行深入系统的研究探讨，提出了一种动态可重构的多dsp并行处理体系结构。
Firstly , it summarized the basic conceptions of image compress processing , parallel processing technique and parallel algorithm briefly . then it emphasized on the network parallel computing environment and logp model of parallel computation . at last , this paper described the methods of developing parallel algorithm and applications through the designing , analyzing , optimizing , and implementing of digital image coding parallel algorithm , include intra - frame coding , inter - frame coding , entropy coding , etc 本文概述了并行处理技术和图像压缩技术；并详述了并行算法、图像压缩算法的基本概念和模型；着重讨论了网络并行logp模型及并行计算的开发环境；并通过fft并行编码算法、 dct并行编码算法、帧间运动估计和补偿的并行算法、游程并行编码算法等图像压缩编码处理的并行算法的设计、分析、优化及模拟实现，较全面、形象地展示了并行算法的开发方法及其应用。
In this paper , we first introduce development of the technology in distributed parallel computing field , and then pay much attention to analyze the principles of message passing system and the core technologies needed in the message passing parallel computing . then , we begin to analyze the pvm system in order to understand its design thought and to learn about its components , its workflow and its communication mechanism , so that we can design the xvm 本文首先介绍了分布式并行处理技术的发展，然后着重分析了消息传递系统的原理和基于消息传递系统进行并行计算需要解决的一些关键技术，并对现有的pvm环境进行分析，了解其设计思想、系统组成、工作流程以及通信机制，以作为xvm系统设计的借鉴。
Considering that wavelet - based image segmentation has very high computational complexity , especially for large images , in order to speed up the process of the large images segmentation , this paper put emphasis on exploring the computational parallelism in wavelet - based image segmentation . the parallelism of the mpi are in - depth analyzed , data parition of the large image also are designed for reducing the data transmission , and parallel wavelet transform algorithms are designed . this paper implement a parallel wavelet - based image segmentation using mpi on cluster machines with the better segmentation rate 为了解决分割的快速性问题，本文把另外一个重点放在应用mpi并行处理技术对基于小波的纹理图像分割进行并行化处理上，研究了mpi并行编程机制，分析了应用其进行并行图像分割的可行性。进而主要以减少并行处理里中的通信量为目的，分别对并行系统框架设计，图像数据划分，小波变换算法并行优化设计进行了研究。
Much more work on the fields had been taken and some fruits had been acquired . after analyzing existing sequence processing methods and software , in order to improve the parallel scalability and speed , some novel parallel algorithms for sequence processing on different computing environment , such as shared memory architecture , distributed memory architecture and grid computing architecture , are presented in this thesis 本文在深入分析当前生物序列处理研究现状的基础上,以提高序列处理性能为目标,基于共享存储环境、分布存储环境以及网格计算环境等不同计算环境,使用不同并行处理技术,解决大规模基因组序列处理中所遇到的实际困难,如可扩展性差、计算速度慢等。
It summarizes the basic conceptions of image compress processing , parallel processing technique and parallel algorithm briefly . then it emphasizes on the network parallel computing environment and logp model of parallel computation . this paper describes the methods of developing parallel algorithm and applications through the designing , analyzing , optimizing , and implementing of digital image processing parallel algorithm , include fft algorithm , wavelet transform , medium filtering , binary image algorithm etc 本文概述了并行处理技术和图像压缩技术;并详细阐述了并行算法及图像处理算法的基本概念和模型;详细讨论了网络并行logp模型及并行算法的开发环境;并进行了fft并行编码算法、小波并行编码算法,中值滤波,图像二值化等图像处理的并行算法的设计与分析。
Based on the characteristic of missile - borne signal processing combining the technology of dsp and parallel processing , a hardware using three high performance dsp chips named ts203 and a fpga is designed . also the corresponding dsp code for the real - time processing of missile - borne sar is realized and the system request is satisfied 根据弹载sar信号处理的特点,结合数字信号处理技术和并行处理技术,设计出基于三片adspts203和一片fpga的成像处理系统,并采用dsp编程技术实现了弹载sar的实时信号处理,满足了系统要求。
