| 基于提升格式整数小波变换的超声图像压缩算法 |
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| 引用本文： | 李银波,高上凯. 基于提升格式整数小波变换的超声图像压缩算法[J]. 北京生物医学工程, 2004, 23(1): 59-63,69 |
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| 作者姓名： | 李银波 高上凯 |
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| 作者单位： | 清华大学电机系,北京,100084;清华大学电机系,北京,100084 |
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| 摘 要： | 本文提出了一种基于提升格式整数小波变换和改进的SPIHT编码(多级树集合分裂算法)的医学超声图像压缩算法.在压缩对象选择和小波变换方面充分考虑了超声扫描线图像的分辨率特性.与基于Mallat小波变换的标准SPIHT编码算法相比,本文算法在压缩比和重建图像峰值信噪比至少不降低的情况上,运算时间不到前者的40％,内存消耗也大大减小,因而更适合于实时图像压缩.
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| 关 键 词： | 提升格式 整数小波变换 SPIHT编码 |
| 文章编号： | 1002-3208(2004)01-0059-05 |
A Compression Algorithm for Ultrasound Images Based on Lifting Scheme Integer Wavelet Transform |
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| LI Yinbo,GAO Shangkai. A Compression Algorithm for Ultrasound Images Based on Lifting Scheme Integer Wavelet Transform[J]. Beijing Biomedical Engineering, 2004, 23(1): 59-63,69 |
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| Authors: | LI Yinbo GAO Shangkai |
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| Affiliation: | LI Yinbo,GAO Shangkai. Department of Electrical Engineering,Tsinghua University 100084 |
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| Abstract: | A compression algorithm for medical ultrasound images based on lifting scheme integer wavelet transform and modified SPIHT(set partitioning in hierarchical trees) is proposed.When choosing the object to be compressed and doing wavelet transform,characteristics of resolutions in axial and lateral directions of ultrasound images are taken into accound.In comparison with standard SPIHT based on Mallat wavelet transform,the time cost of the algorithm proposed by this paper is less than 40% of that of the former algorithm,and the memory cost is also reduced greatly,as well as the compression ratio and peak-signal-to-noise of reconstructed images remain the same with,if not higher than,the former algorithm.Therefore this algorithm is more competent for real-time image compression. |
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| Keywords: | Lifting scheme Integer wavelet transform SPIHT encoding |
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