一种基于RICE算法的遥感图像数据的实时无损压缩与解压缩算法的研究及FPGA实现  

Research and implementation of the algorithm for data real-time and lossless compression and decompression basing on RICE for remote sensing image

作　　者：刘虹[1] 孙春燕[1] 丁雷[1] 

机构地区：[1]中国科学院上海技术物理研究所

出　　处：《量子电子学报》2005年第1期19-24,共6页Chinese Journal of Quantum Electronics

摘　　要：提出了一种应用于遥感图像数据无损压缩的算法。该算法改进了CCSDS(美国空间数据系统咨询委员会)推荐的RICE算法,并结合DPCM和差值映射预测编码,应用于卫星遥感图像的无损数据压缩,取得了很好的压缩效果,平均压缩率在1.6以上,由于设计目标是输入数据速率为16M/bps,输出数据速率为10M/bps,故该压缩率保证了实时处理的可行性。在软件(VC)实现的基础上,以现场可编程逻辑阵列(FPGA)物理实现,进行压缩卡与解压缩卡的系统研制。A lossless compression and decompression method is presented, which is based on RICE code recommended by CCSDS(Consultative Committee for space Data Systems). After bringing the function to software, the algorithm is optimized and the function is achieved successfully in FPGA using the Verilog hardware description language. The compression card and the decompression card which have been manufactured are small cubage, light weight and low power consumption. The system's highest processing speed can achieve 20M bits per second. It is possible to extend the data capability of this system. The system is mainly used for remote sensing image of MODIS. Its average compression ratio is over 1.6.

关 键 词：图像处理 遥感图像 MODIS RICE编码器 无损压缩 FPGA 

分 类 号：TN253[电子电信—物理电子学]