基于嵌入零树小波算法的磁共振图像压缩研究  

A Researching on MRI Image Compression Base On EZW Algorithm

作　　者：张松[1] 蔡方凯[1] 董凯宁[2] 

机构地区：[1]成都电子机械高等专科学校通信系,四川成都610031 [2]四川大学电子信息学院,四川成都610064

出　　处：《通信技术》2007年第12期400-402,共3页Communications Technology

摘　　要：医学影像技术的广泛应用,产生了大量图像数据,医学图像压缩技术可以在保证图像使用质量的前提下,将图像的数据量减小,以便于存储和传输。医学图像压缩技术很多,小波分析以其多分辨率分析特性,能很好的满足人眼的视觉特性,近年得到迅猛的发展,其中嵌入零树小波(Embedded Zerotree Wavelet,EZW)算法又堪称其中的经典。但该算法编码时间长,效率不高,没有充分利用小波的多分辨率分析特性。文中在分析EZW算法基础上,将游程长度编码(Run Length Coding RLC)溶入其中,提出一种改进的医学图像压缩技术。The wide use of medical image produces a great deal image data, The aim of medical image compression technology is reducing its data stream, thus easy for image archiving and communication, There are many medical image compression technologies, among which wavelet transform is an important technology for its multi-resolution, and can fit human vision system well. And the most typical method is EZW（Embedded Zerotree Wavelet）algorithm. However, EZW is low in efficiency, and has notmade full use of the multi-resolution analytical property of the wavelet transform Therefore, this paper brings out a modified algorithm which, based on the analysis of EZW, merges RLC（Run Length Coding）into EZW, thus to improve this typical algorithm.

关 键 词：图像压缩 小波变换 EZW算法 游程长度编码 

分 类 号：TN919[电子电信—通信与信息系统]