高分辨率航测CCD图像的无损压缩算法  

A Lossless Compression Algorithm Based on High-resolution CCD Images

作　　者：陈苏婷[1] 杨世洪[2] 

机构地区：[1]南京信息工程大学电信学院,江苏南京210044 [2]中国科学院光电技术研究所,四川成都610209

出　　处：《半导体光电》2008年第6期976-979,共4页Semiconductor Optoelectronics

基　　金：国家"863"计划项目(2003AA823050)

摘　　要：针对超高分辨率CCD相机拍摄图像,提出了一种无损压缩算法。算法以嵌入式小波零树编码为基础,通过对零树编码输出的比特平面采用变长游程编码方法很好地提高了图像压缩比。同时,算法将游程编码与比特平面编码统一进行,编码效率大大提高。实验结果表明,该算法的像素平均比特率相对经典的嵌入式小波零树算法均有明显降低。A lossless image compression algorithm is proposed based on the images obtained from the first domestic superhigh resolution CCD camera. Based on the embedded wavelet zero- tree coding algorithm, by adopting run length coding for the bit-plane output of the embedded zero-tree algorithm, the compression ratio and the coding efficiency are improved greatly. The experimental result shows that BPP of this method is reduced more significantly than that of classical embedded wavelet zero-tree algorithm.

关 键 词：超高分辨率相机 无损压缩 嵌入式小波零树编码 游程编码 

分 类 号：TN911.73[电子电信—通信与信息系统]