基于多DSP的遥感图像压缩系统  

Remote sensing image compression system based on multi-DSP

作　　者：葛宝珊[1] 李波[2] 王前[2] 张文生[1] 

机构地区：[1]中国科学院自动化研究所,北京100085 [2]北京航空航天大学计算机学院,北京100083

出　　处：《计算机工程与设计》2007年第21期5139-5140,5155,共3页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2003AA783044);教育部博士点基金项目(20030006034);霍英东教育基金项目(81059)

摘　　要：遥感图像数据量大,而且不断增加,一般要求实时处理。针对这一特点,提出了基于4-DSP的积木式硬件体系结构来解决这一问题,并设计实现了高性能的遥感图像压缩原理样机。充分利用近邻居、远邻居和父子系数间的多种相关性进行预测,压缩算法性能优于SPIHT和JPEG2000,并被移植到原理样机上。最后,指出了系统应改进的方向。Remote sensing image data is huge and increasing unceasingly, and real-time processing is desired generally. In accordance with this feature, a kind of hardware architechure solution is presented based on 4-DSP blocks is presented, and a high performance remote sensing image compression model machine is designed and reslized. A compression algorithm is presented, which takes advantage of the correlation between near neighhbour, far neighbour and father-children coefficients to predict. The algorithm is better than SPIHT and JPEG2000, and is transported into the model machine. At last, the improving directions are pointed out.

关 键 词：数字信号处理器 图像压缩 多处理器 并行处理 流水线 

分 类 号：TP331[自动化与计算机技术—计算机系统结构]