DM编码对Huffman编码的优化作用  

Optimize The Huffman Coding By DM Coding

作　　者：杨锐[1] 刘洪基 李必瑾 

机构地区：[1]云南师范大学计算机科学系

出　　处：《云南师范大学学报（自然科学版）》1998年第1期35-40,共6页Journal of Yunnan Normal University:Natural Sciences Edition

摘　　要：本文基于目前较为流行的图象编码方法——Ｈｕｆｆｍａｎ编码的优缺点和其适应性，使用ＤＭ编码对其进行改进。遵循两个途径：１．先使用ＤＭ编码进行预处理，再使用Ｈｕｆｆｍａｎ编码进行压缩。２．先使用Ｈｕｆｍａｎ编码压缩，再使用ＤＭ编码进行事后处理。文中针对二值图象，２５６级灰度图象进行了大量实验，得出了较有意义的结论。同时针对１６色、２５６色及１６．７兆色的彩色图象的实现，给出了分析和建议。另外，对于此方法在图象文件和声音文件压缩方面的适应性也作了说明。The paper is based on advantages, shortcomings and adaptabilities of current image coding methode-Huffman Coding, and improvement had been made by use DM coding methode, there are two ways to reach the goal: 1. First of all, image data had been pre-procecced by DM Coding Methode, after that, compress the image data by Huffman Coding Methode; 2. Compress image data with Huffman Coding Methode at first, then post-processing by DM Coding Methode. The paper aimed Two Value Images, and a huge of experiments had been made on 256 grades gray image, we have achieved some significant results finally.

关 键 词：HUFFMAN编码 DM编码 图象处理 图象压缩 计算机 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]