空间太阳望远镜FPGA星载图像压缩模块的设计与实现  

The Development and Implementation of FPGA Compressed Module for Onboard Images of Space Solar Telescope

作　　者：马瑞敏[1] 王景宇[1] 王国权[2] 

机构地区：[1]中国科学院国家天文台空间技术实验室,北京100012 [2]黑龙江科技学院计算机与信息工程学院,哈尔滨150027

出　　处：《宇航学报》2008年第4期1345-1349,1380,共6页Journal of Astronautics

基　　金：国家863高技术研究发展计划(863-2.5.1.25);黑龙江省教育厅科学技术研究项目(11511355)

摘　　要：应用(5,3)整数小波变换和稀疏矩阵的游程编码方法,为空间太阳望远镜卫星(SST)中的图像压缩单元(DCU)构建了一种高效高速的FPGA运算模块,使DCU压缩2048×1024大小太阳图像的时间由原先中德联合设计的32秒减为0.23秒,压缩速度提高了两个数量级,各项技术指标均满足SST科学任务需求,为今后扩展功能及航天高精度遥感技术发展提供了宝贵的经验和技术储备。Basing on the theory of Wavelet Transform as well as the method of sparse matrix realized using RLE coding, some module with high efficiency and velocity was constructed, which has quickened the time of compressing the images of sun with resolution 2048×1024 from 32 seconds （designed by Sino-German group） to 0.23 second- 100 times of improvement. The technical index of this technique all fulfill the requirements of SST, at the same time, it provides valuable experience and technology for future function expanding and application of space high-precision remote measurements.

关 键 词：SST 图像压缩 小波变换 稀疏矩阵 RLE FPGA 

分 类 号：V447[航空宇航科学与技术—飞行器设计] V443