基于内容的分形视频压缩方法  

Content-based fractal image compression system

作　　者：方艳[1] 程航[1] 王美清[1] 

机构地区：[1]福州大学数学与计算机科学学院,福建福州350002

出　　处：《福州大学学报（自然科学版）》2006年第1期39-42,共4页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(A0510005);福州大学人才基金资助项目(XJB-0304);福州大学科技发展基金资助项目(2005-XQ-16)

摘　　要：在小段视频播放中背景经常都是不变的,而只有前景对象在变动.针对视频这种特性,把视频压缩新标准MPEG-4中基于内容的概念与分形视频压缩编码相结合,提出了一种新的压缩方法———基于内容的分形视频压缩方法.该方法先将视频序列分割出前景对象与背景对象,然后分别针对分割出来的前景对象与背景对象进行压缩,而此时背景就可以只压缩一帧或者关键几帧.实验结果表明针对大背景的视频图像,该方法能够在保证压缩质量的情况下大幅度地提高压缩比.Abstract： The background often does not change and only the foreground objects change in a small video. Therefore, in this paper we combine the content - based method, which is a concept of video compression new standard MPEG - 4, with fractal video compression method and put forward a new compression algorithm, which is called content - based fraetal video compression method. In this algorithm, the foreground objects and background are divided and then compressed separately. We only need to compress one or several background of key frames. Expermental results show that while keeping the quality of decompressed images, the proposed algorithm greatly improves the image compression ratio which the background accounts for a considerable proportion of the image.

关 键 词：图像处理 分形 图像分割 MPEG-4 基于内容 

分 类 号：TN911[电子电信—通信与信息系统] TP391[电子电信—信息与通信工程]