基于LEON2和FPGA的在轨图像小波变换模块设计  

Implementation of on-line wavelet transform based image compression with LEON2 and FPGA

作　　者：马瑞敏[1] 金声震[1] 

机构地区：[1]中国科学院国家天文台空间天文技术实验室,北京100012

出　　处：《光电子．激光》2008年第12期1682-1685,共4页Journal of Optoelectronics·Laser

基　　金：国家高技术研究发展计划"863"资助项目(863-2.5.2.25)

摘　　要：利用Leon2处理器核和具有丰富内部资源的FPGA芯片,为空间太阳望远镜(SST)图像压缩单元成功设计了高性能的基于纯硬件架构的(5,3)整数-整数二维小波变换模块。该模块对2048×1024×2B的太阳图像进行变换耗时约为0.2 s,比欧空局(ESA)的DSP软件方法提高了数十倍运算速度,不仅满足SST卫星在轨图像压缩的任务指标,而且在结构上也易于与其后的多种编码处理灵活衔接,同时还具有体积小、功耗低、容错性好、通用性强等特点,可以广泛应用于多种航天图像压缩领域。The highly efficient （5,3） Integer-to-Integer wavelet transformation module is constructed for the data compression unit of space solar telescope（SST）, which is developed by using Leon2 processor and FPGA chips. It only takes this module around 0.2 second to transform the images of sun with resolution 2048 × 1024, which is much quicker than the DSP method designed by ESA. Besides that,this module can fulfill the requirements of SST,and structurally easily be connected to other subsequent programs;and with the nature of small size, low power dissipation, advanced fault-tolerance features and universal application,this module can be applied to various fields relating to space image compression.

关 键 词：SST 图像压缩 LEON2 FPGA 小波变换 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]