实时图像小波无损压缩系统的FPGA实现  

FPGA Implementation of a Real-time Image Processing System Based on Wavelet Lossless Compression

作　　者：马玲玲[1] 刘云飞[1] 印辉云[1] 周阳[1] 

机构地区：[1]南京林业大学信息科学技术学院,江苏南京210037

出　　处：《河南科技大学学报（自然科学版）》2012年第3期20-24,110,共5页Journal of Henan University of Science And Technology:Natural Science

基　　金：江苏省第七批"六大人才高峰"基金项目(DZXX-149);江苏省高校优势学科建设工程基金项目

摘　　要：将Altera公司的DE2多媒体开发平台与Terasic公司的D5M数码相机开发套件相结合,设计了一套基于小波无损压缩的实时图像处理系统。系统采用便于可编程逻辑器件灵活实现的二维整数5/3提升小波变换实现压缩。为保证图像的无损压缩,对边界数据进行对称周期延拓处理。并针对实时处理过程中的大容量数据流的存储问题,应用片外存储资源保存采集和处理过程中的图像数据,有效地降低了片上存储资源的消耗。测试结果表明:系统满足实时图像采集、预处理及无损压缩的要求。A real-time image processing system based on the wavelet lossless compression was designed by combining Altera’s multimedia development platform DE2 with Terasic’s D5M digital camera development kit.To facilitate the programming of programmable logic devices,a hardware structure which worked with the two-dimensional integer 5/3 lifting wavelet transform was adopted.The structure processed the boundary data with the method of symmetric periodic extension,ensuring lossless compression of images.In order to resolve the memory problems of large amounts of data in real-time processing,the system made full use of off-chip RAM to minimize the demand for on-chip memory.The test result showed that the system meets the requirements of real-time image acquisition,preprocessing and lossless compression.

关 键 词：FPGA D5M 5/3提升小波 实时图像 无损压缩 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]