一种基于ridgelet和wavelet的混合编码压缩算法  

A Hybrid Coder Scheme Based on the Ridgelet and Wavelet Transform

作　　者：舒正华[1] 邹道文[2] 汪胜前[2] 刘国栋[2] 邓松[3] 

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330027 [2]江西科技师范学院光电子与通信重点实验室,江西南昌330013 [3]武汉理工大学信息学院,湖北武汉430000

出　　处：《江西师范大学学报（自然科学版）》2007年第2期111-114,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60462003)

摘　　要：星云图和MPEG-4中运动补偿后得到的残差图像通常是点线奇异性明显的图像.小波变换是表示点奇异性的有效工具,脊波变换(ridgelet)是表示线奇异性的理想工具.该文基于二者的优点提出了一种基于脊波变换和小波变换的混合编码框架用来处理压缩点线奇异性明显的图像.实验结果表明这种混合编码可以有效地对点线奇异性明显的图像进行编码,其效果优于基于单独的小波变换的SPIHT编码和脊波变换的SPIHT编码.Galaxy images and motion compensated images in MPEG-4 are typically zero-dimensional and linear singularities images. Wavelet transform is a powerful instrument in catching zero-dimensional singularities. Ridgelet are a powerful instrument in catching and representing mono-dimensional singularities in bidimensional space. Based on their strongpoint we propose an adaptive hybrid video coder scheme using ridgelet and wavelet transform that compresses zero-dimensional and linear singularities images. Experimental results show that the adaptive hybrid video coder scheme can effectually code zero-dimensional and linear singularities images, performs much better than separately the Compression Algorithm using FRIT with Modified SPIHT and the Compression Algorithm using wavelet Transformation with Modified SPIHT.

关 键 词：小波变换 有限脊波变换 编码 SPIHT MAD 

分 类 号：TN911.73[电子电信—通信与信息系统]