一种改进的LZW算法在图像编码中的应用  

Application of an Improved LZW Algorithm in Image Coding

作　　者：蓝波[1] 林小竹[1] 籍俊伟[1] 

机构地区：[1]北京石油化工学院信息工程学院,北京102617

出　　处：《计算机工程与科学》2006年第6期55-57,共3页Computer Engineering & Science

基　　金：北京市教委面上项目(KM200410017002)

摘　　要：在医学、安全、遥感等领域,由于数据保真度要求苛刻,对高效的图像无损压缩方法有着迫切的需求。本文通过对字典压缩方法的研究和分析,针对传统LZW方法在建立字典初期压缩效果差这一不足,提出了一种动静结合的改进LZW字典压缩算法。实验结果表明,改进的LZW算法的压缩比相对于传统算法有较明显的提高。In some fields such as medicine, security and remote sensing, the technology of image lossless compression is highly demanded because the difference between the original and reconstructed images cannot be tolerated. During the research and analysis of the dictionary compression methods, an improved algorithm based on the combination of dynamic and static eircumstances is put forward. Consequently, the new method solves the problem of poor compression effect during the original period of creating a dictionary. The results of experiments show the compression ratio is increased after the applicw tion of the improved LZW algorithm.

关 键 词：图像压缩 压缩算法 字典压缩 LZW 

分 类 号：TN911.73[电子电信—通信与信息系统] TN919.81[电子电信—信息与通信工程]