摘要
提出了一种新的小波系数分类算法 ,基于该分类算法 ,提出了一种更为合理的无损编码算法。实验结果显示 。
In pyramidal algorithm, an image is decomposed into multiresolution subbands with sets of tree-structured coefficients. A novel coefficient partition algorithm is introduced to split coefficients into two sets using a spatial orientation tree data structure. By splitting the coefficients, the overall theoretical entropy is reduced due to the different probability distribution for the two coefficient sets. A lossless coder based on the algorithm has a better performance than other wavelet-based lossless coders in our experiments.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2004年第9期809-811,826,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目 ( 4 0 2 0 40 0 8)
关键词
熵
全深度方向树
小波系数分类
自适应算术编码
entropy
full depth orientation tree
wavelet coefficients partition
adaptive arithmetic coding
