上海大学学报(自然科学版) ›› 2011, Vol. 17 ›› Issue (1): 39-43.doi: 10.3969/j.issn.1007-2861.2011

• 通信与信息工程 • 上一篇    下一篇

基于多小波的彩色图像分层树集合分裂算法

陈俊丽,卿定湖,李翔,万旺根   

  1. (上海大学 通信与信息工程学院,上海 200072)
  • 收稿日期:2010-04-02 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: 陈俊丽(1972~),女,副教授,博士,研究方向为小波和多媒体信息处理. E-mail:jlchen@staff.shu.edu.cn
  • 基金资助:

    国家高技术研究发展计划(863计划)资助项目(2007AA01Z319);上海市教委重点学科建设资助项目(J50104)

Set Partitioning in Hierarchical Trees Algorithm for Color Images Based on Multiwavelet

CHEN Jun-li, QING Ding-hu, LI Xiang, WAN Wang-gen   

  1. (School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China)
  • Received:2010-04-02 Online:2011-02-28 Published:2011-02-28

摘要:

提出一种基于多小波变换的改进的彩色图像分层树集合分裂(set partitioning in hierarchical trees, SPIHT)算法,将彩色RGB图像转换到YCbCr色彩域,Y通道分配到2倍于Cb,Cr的比特,在各色彩通道间构造新的方向树结构,重组图像多小波分解系数,进行嵌入式多小波彩色图像SPIHT编码.结果表明,该算法具有良好的编码效果,性能优于9/7单小波编码.

关键词: 多小波;分层树集合分裂;嵌入式编码;空间方向树;图像压缩

Abstract:

We proposes an improved color set partitioning in hierarchical trees (SPIHT) algorithm based on multiwavelet. The algorithm converts a RGB color image into the YCbCr format. Clearly, bits assigned to luminance Y plane are twice than that Cb and Cr chrominance planes. A new spatial orientation tree structure is developed between channel planes based on SPIHT coding. We embed multiwavelet SPIHT codes for color images with the re-combined multiwavelet coefficients. The results show that performance of the proposed coding method is superior to SPIHT on 9/7 wavelet.

Key words: multiwavelet;set partitioning in hierarchical trees (SPIHT);embedded coding;spatial orientation tree;image compression

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