计算机工程与应用 ›› 2010, Vol. 46 ›› Issue (31): 243-245.DOI: 10.3778/j.issn.1002-8331.2010.31.068

• 工程与应用 • 上一篇    下一篇

DPCM与EZW混合编码在医学图像中的应用研究

翟 国1,宋余庆1,谈佳宁1,徐 庆2   

  1. 1.江苏大学 计算机科学与通信工程学院,江苏 镇江 212013
    2.西安电子科技大学 机电工程学院,西安 710071
  • 收稿日期:2008-09-03 修回日期:2008-11-19 出版日期:2010-11-01 发布日期:2010-11-01
  • 通讯作者: 翟 国

Research on medical image hybrid coding based on DPCM and EZW algorithm

ZHAI Guo1,SONG Yu-qing1,TAN Jia-ning1,XU Qing2   

  1. 1.Department of Computer Science and Telecommunication Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China
    2.School of Electromechanical Engineering,Xidian University,Xi’an 710071,China
  • Received:2008-09-03 Revised:2008-11-19 Online:2010-11-01 Published:2010-11-01
  • Contact: ZHAI Guo

摘要: 现代医疗成像设备产生了大量高价值的医学图像,如何对信息进行有效的存储、查询以及网络传输是一个亟待解决的问题。利用整数小波变换和零树编码算法对医学图像进行了压缩研究,在对嵌入零树小波编码(Embedded Zero-tree Wavelet,EZW)算法研究的基础上提出一种基于小波系数的嵌人零树小波编码算法。其主要包括:对小波图像的低频子带(LL)进行单独DPCM编码;对高频子带改变扫描方式以获得最佳编码排序,最后用游程编码(RLE)实现输出。实验结果表明,该方法是一种比较有效的编码方法。

关键词: 医学图像, 整数小波变换, 差分脉冲编码调制, 提升方法, 嵌入式零树小波

Abstract: A great deal of medical images have been created by modern medical treatments.How to store,query and transmit these medical images have become a urgent problem.In this paper,the research on medical images based on integer to integer wavelet transform and embedded zero tree encoding is proposed.DPCM codes respectively the low-frequency sub-band(LL) of Wavelet image.The scanning method of the high-frequency sub-band is changed to get the best coding sort.Finally the Run-Length Encoding(RLE) achieves the output.The result shows that the algorithm can get better compressing efficiency and is feasible.

Key words: medical image, Integer Wavelet Transform(IWT), Differential Pulse Code Modulation(DPCM), lifting scheme, Embedded Zero-tree Wavelet(EZW)

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