一种新的嵌入式零树小波图像编码算法研究  

The New Arithmetic Research of EZW

作　　者：杨永[1] 唐国维[1] 

机构地区：[1]大庆石油学院计算机与信息技术学院,黑龙江163318

出　　处：《微计算机应用》2008年第2期59-62,共4页Microcomputer Applications

基　　金：黑龙江省自然科学基金项目(F2004-01)

摘　　要：针对嵌入式零树小波编码方法对所有频率的子带采用同等重要度的编码,不能完全利用小波系数的特点,在逐次逼近量化过程中,编码时间过长,导致编码效率下降等不足,提出了分频嵌入式零树小波编码方法。将小波图像的高频子带和最低频子带分别编码,实验结果表明该方法在保证恢复图像具有良好的视效果前提下,进一步提高了压缩比。EZW takes equal important code for all frequencies, so it can＇t make use of the characteristics of the wavelet＇s coefficient completely. The coding time is too long and the coding efficiency is low during the process of gradually approximating and quantizing, so we put forward the separate - frequency EZW. This arithmetic codes the high and low frequencies of wavelet image respectively. And the results of experiment show that the arithmetic has raised the compress ratio further on the premise of instauration picture having a good visual - effectiveness.

关 键 词：嵌入式零树小波编码 分频 图像编码 EZW算法 

分 类 号：TN919.81[电子电信—通信与信息系统] TD673[电子电信—信息与通信工程]