基于Zlib的图像差异压缩算法研究与实现

Research and Realization of Image Difference Compression Algorithm based on Zlib

在视频图像的网络传输中需要对图像进行压缩,分析图像变化较小时的数据特性,通过算法将前后两幅图像的差异数据提取出来,结合Zlib压缩技术,实现较高的压缩比。介绍了这种图像差异压缩算法的设计背景和思路,采用Delphi语言进行对比分析。试验结果表明,该算法在图像变化不大时的网络传输效果较好,在录屏软件的开发方面也具有实用价值。

Video in network transmission need to be compressed.To analyze the data characteristics of image at the time of small changes,extract the difference data between two images before and after through the algorithm,combined with Zlib compression techniques,it achieves a higher compression ratio.This article describes the background and idea of this image difference compression algorithm,comparing and analyzing through Delphi language.The experiment result shows that the algorithm is better when the image changes small on netwrok transmission.The algorithm is valuable on development of recording screen software.