一种基于零树的小波图像编码方法  

A Wavelet Image Encoding Method Based on Zerotree

作　　者：陈红卫[1] 俞孟蕻[1] 

机构地区：[1]华东船舶工业学院电子信息系,镇江212003

出　　处：《计算机工程与应用》2004年第23期86-88,共3页Computer Engineering and Applications

摘　　要：在Shapiro零树编码方法基础上,用矩阵描述父子关系,结合剪枝概念定义了零重要元素,提出了一种基于零树的小波图像编码方法,实现了此编码方法;用几幅标准图像对此编码方法进行仿真实验,给出了实验结果,并把实验结果与原零树编码方法实验结果进行比较,结果表明:在同样信噪比下,提高了压缩比,编解码的复杂度却并未增加。According to Shapiro's zerotree encoding,a new scheme for wavelet image compression based on zerotree is introduced in this paper.The parent-children relation is depicted in matrix,zero significant coefficient is defined by pruning and this encoding method is implemented.With several standard images,the simulation is carried out and these experimental results are present ed.It is shown that this method can improve compression rate in the same PSNR and remain the encoding complexity.

关 键 词：图像编码 图像压缩 小波图像 小波分解 零树 小波变换 

分 类 号：TN919.81[电子电信—通信与信息系统]