静态图象的动态压缩方法  

DYNAMIC COMPRESSION OF STILL IMAGES

作　　者：陈九庆[1] 王介生[1] 刘慎权[1] 

机构地区：[1]中国科学院计算技术研究所

出　　处：《计算机研究与发展》1998年第8期729-733,共5页Journal of Computer Research and Development

基　　金：国家自然科学基金

摘　　要：文中介绍一种通过动态压缩途径来压缩静态图象的方法．该方法首先使用排列变换将静态图象分解成动态图象序列，然后再利用现有的ＭＰＥＧ压缩程序对该图象序列进行压缩．文中还讨论了各种扫描曲线对于所生成的图象序列中相关性的影响，肯定了希尔伯特曲线的良好的局部相关性．最后使用标准测试图象Ｌｅｎａ进行了实验，结果，在压缩比同为６６：１的情况下，本方法的峰值信噪比（ＰＳＮＲ）要比ＪＰＥＧ高出０．６ｄＢ左右．A dynamic method for compressing still images is presented in the paper. It decomposes a still image into a series of continuous subimages by a permutation transform, then compresses the subimage sequence by an MPEG encoder. Four types of scan paths are used to sequentialize the subimages, and the Hilbert curve is proved to be the best one due to its perfect local clustering property. The overall performance of the presented method is compared with that of the conventional JPEG method. The quality of the decoded image can be improved by a value of about 0.6dB in PSNR under the same compression ratio 66:1.

关 键 词：图象压缩 MPEG 动态压缩 静态图象 图象处理 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]