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DPCM与EZW混合编码在医学图像中的应用研究 被引量:2

Research on medical image hybrid coding based on DPCM and EZW algorithm
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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。 A great deal of medical images have been created by modem 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.
出处 《计算机工程与应用》 CSCD 北大核心 2010年第31期243-245,共3页 Computer Engineering and Applications
基金 国家自然科学基金No.60572112 江苏省高技术项目(No.BG2007028) 江苏省六大人才高峰项目(No.07-E-025) 江苏省教育厅项目(No.06KJB120051)~~
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 medical image Integer Wavelet Transform(IWT) Differential Pulse Code Modulation(DPCM) lifting scheme Embedded Zero-tree Wavelet(EZW)
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