探空火箭图像压缩算法研究  

Research of Image Compression Algorithm for Sounding Rocket

作　　者：李国庆[1,2] 刘波[1] 于世强[1] 

机构地区：[1]中国科学院空间科学与应用研究中心,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《空间科学学报》2012年第2期289-297,共9页Chinese Journal of Space Science

基　　金：中国科学院空间科学与应用研究中心知识创新工程青年创新项目资助(O8211DA29S)

摘　　要：结合探空火箭图像系统需求,提出了一种基于小波变换编码,即基于MSPIHT的自适应差分算术编码(MSPIHT Adaptive Differential Arithmetic Coding for image,MADAC)的图像压缩算法.该算法对经过量化编码之后的数据进行熵编码.实验结果表明,MADAC算法具备探空火箭图像系统所要求的分辨率、帧速率及压缩率可调的功能,且易于硬件实现.According to the requirements of Sounding Rocket Image System, an image compression algorithm based on Discrete Wavelet Transform coding -- MSPIHT Adaptive Differential Arithmetic Coding for image （MADAC）, is proposed. In the algorithm, the Modified SPIHT （MSPIHT） method is used to scan and quantize the parameters of the Wavelet Transform and an adaptive differential arithmetic algorithm is designed to code the data after the quantization stage in the entropy stage. Result of experiments shows that the performance of MADAC is satisfying, and the adjustable image resolution, frame rate and compression ratio required by the Sounding Rocket Image System could be realized through MADAC. All the three stages of MADAC are easy to be implemented on hardware.

关 键 词：探空火箭 图像压缩编码 提升小波 改进的SPIHT 自适应算术编码 差分编码 

分 类 号：V475.1[航空宇航科学与技术—飞行器设计]