用于星上图像压缩的JPEG2000算法的改进  

Modification of JPEG2000 algorithm for the on-board application

作　　者：谢华[1] 金声震[2] 

机构地区：[1]北京大学物理学院天文系,北京100871 [2]中国科学院国家天文台空间天文实验室,100012

出　　处：《高技术通讯》2008年第1期33-36,共4页Chinese High Technology Letters

基　　金：863计划(863-2.5.1.25)资助项目

摘　　要：本文修改了 JPEG2000算法,通过改变编码顺序节约了大量的计算,提高了运行速度。用此算法对空间太阳望远镜的目标图像进行了实验,结果表明在相同压缩比的情况下,修改后的算法对图像质量没有明显的影响,在运行时间和压缩质量方面都能够满足空间太阳望远镜的压缩任务要求。This paper proposed an algorithm modification of JPEG2000, which decreased the computational complexity by adjusting the coding sequence. With the images that the Space Solar Telescope will probably capture, the experiments were carried out. The result indicated that the modification did not cause obvious degrade on the image quality at the same compression ratio. The modified algorithm satisfied the requirement of the Space Solar Telescope Project both in compression speed and quality.

关 键 词：卫星 图像压缩 JPEG2000 小波变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]