一种新的基于三维小波变换的序列图像编码算法  

New compression algorithm of image sequence coding based on 3-D wavelet transform

作　　者：何同林[1] 尤春艳[2] 郑鹏[3] 

机构地区：[1]重庆工程职业技术学院计算机系 [2]重庆通信学院DSP实验室 [3]78046部队

出　　处：《计算机应用》2007年第6期1452-1454,1457,共4页journal of Computer Applications

摘　　要：介绍了由时间轴一维与帧内二维组合而成的准三维小波变换结合运动补偿的编码器结构,并针对运动变化较缓慢的序列图像,观察实验数据特点,提出了改进零树编码与像素点编码相结合的编码策略。计算机仿真实验证明,采用该方法,可有效降低计算复杂度,提高执行效率,同时在压缩比达到400∶1时,图像恢复质量仍在29dB以上。To compress image sequence, a coder structure, which combines the standard 3-D wavelet transform with motion compensation, was introduced. For image sequence with slow motion, according to the characteristic of the wavelet transformed data, a new coding algorithm, which integrated the improved EZW （Embedded Zerotree Wavelets Encoding） and pixel coding, was presented. Computer simulation shows that through the method not only the computational complexity is reduced but also even when the compress ratio gets 400： 1, the recovered image quality still can gain more than 29dB.

关 键 词：三维小波 图像压缩 运动补偿 像素编码 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]