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基于图像先验知识的快速EZW算法研究
引用本文:马文波,赵保军,毛二可.基于图像先验知识的快速EZW算法研究[J].激光与红外,2007,37(5):485-489.
作者姓名:马文波  赵保军  毛二可
作者单位:北京理工大学信息科学技术学院电子工程系,北京,100081
基金项目:国家高技术研究发展计划(863计划)
摘    要:文章研究了一种适合在高速DSP上运行的快速零树编码算法.通过分析传统EZW的数据压缩流程以及DSP的处理机制,提出了一种新的压缩编码算法.本算法从大量图像小波变换系数的统计特性中提取先验知识,用以指导压缩编码,使之在DSP上运行的速度得到了极大的提高,并已在某高输入数据率的图像压缩项目上使用,效果良好.

关 键 词:图像压缩  实时处理  小波变换  DSP  EZW算法  基于图像  先验知识  快速  算法研究  Knowledge  Image  Based  Algorithm  效果  使用  项目  图像压缩  数据率  输入  速度  压缩编码算法  指导  提取  统计特性  变换系数
文章编号:1001-5078(2007)05-0485-05
修稿时间:2006-11-06

Fast EZW Algorithm Based on Image Priori Knowledge
MA Wen-bo,ZHAO Bao-jun,MAO Er-ke.Fast EZW Algorithm Based on Image Priori Knowledge[J].Laser & Infrared,2007,37(5):485-489.
Authors:MA Wen-bo  ZHAO Bao-jun  MAO Er-ke
Affiliation:Department of Electronic Engineering, School of Information Science and Technology,Beijing Institute of Technology, Beijing 100081,China
Abstract:Based on the analysis of data encoding procession of the classical EZW and the operation methods of DSP,a new fast algorithm of zerotree wavelets coding which adapted to high-speed DSP(Digital Signal Processor) is considered in this paper.In the algorithm,apriori knowledge is extracted from statistical properties of image wavelet transform coefficients in order to guidance the compression coding.The new fast image compression algorithm is improved to be operated on the DSP in much faster speed.This new algorithm has been applied to an actual high-speed real-time compression project successfully and the result is very satisfied.
Keywords:image compression  real-time procession  wavelet transform  DSP  EZW algorithm
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