基于多树分片贪婪寻优的方向小波变换图像编码

基于多树分片贪婪寻优的方向小波变换图像编码

刘辉, 左平

吉林大学数学研究所, 长春 130012

收稿日期:2007-05-17 修回日期:1900-01-01 出版日期:2008-03-26 发布日期:2008-03-26
通讯作者: 刘辉

Image Coding with Directional Wavelet Transform Based onGreedy Algorithm of Multitree Segmentation

LIU Hui, ZUO Ping

Institute of Mathematics, Jilin University, Changchun 130012, China

Received:2007-05-17 Revised:1900-01-01 Online:2008-03-26 Published:2008-03-26
Contact: LIU Hui

摘要/Abstract

摘要： 为了更好的利用图像的局部方向性, 采用方向小波变换和贪婪算法寻找次最优多树分片, 并利用易于实现的经验RD公式作为贪婪寻优准则. 实验结果表明, 与一些流行的编码方法相比, 所给的算法具有较好的编码增益和视觉质量.

关键词: 多树分片, 贪婪算法, 方向小波变换, 分层零树编码

Abstract: A new image coding method was proposed. In order to suffciently take advantage of local directionality of natural images, we adopted directional wavelet transform and greedy algorithm for suboptimal multitree tiling. Meanwhile we utilized empirical RD formula as the greedy criterion. The results indicate that our method performs better in coding gain and visual quality.

Key words: multitree, greedy algorithm, skewedwavelet transform, layer zero coding

中图分类号:

TP391

刘辉, 左平. 基于多树分片贪婪寻优的方向小波变换图像编码[J]. J4, 2008, 46(02): 271-274.

LIU Hui, ZUO Ping. Image Coding with Directional Wavelet Transform Based onGreedy Algorithm of Multitree Segmentation[J]. J4, 2008, 46(02): 271-274.