| 基于二维小波变换的图像压缩新算法 |
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| 引用本文： | 张翠芳,朱莉娟.基于二维小波变换的图像压缩新算法[J].南京邮电大学学报(自然科学版),2011,31(4):61-66. |
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| 作者姓名： | 张翠芳 朱莉娟 |
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| 作者单位： | 1. 南京邮电大学通信与信息工程学院,江苏南京,210003
2. 南京邮电大学电子科学与工程学院,江苏南京,210003 |
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| 基金项目： | 国家自然科学基金(60902065)资助项目 |
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| 摘 要： | 为了实现快速、高质量的图像传输,用尽可能少的小波系数高质量地表征图像,提出了一种基于二维小波变换的图像压缩算法.首先将图像进行二维小波分解,得到各子带的一系列小波系数；其次保留图像低频子带的所有小波系数；然后根据归一化能量序列熵准则提取其他各层子带重要系数,即在某一门限下剩余系数熵值与剩余系数最大熵值比值较大(0.9左...
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| 关 键 词： | 二维小波变换 图像压缩 能量序列 熵准则 |
A New Image Compression Algorithm Based on Two-dimensional Wavelet Transform |
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| ZHANG Cui-fang,ZHU Li-juan.A New Image Compression Algorithm Based on Two-dimensional Wavelet Transform[J].Journal of Nanjing University of Posts and Telecommunications,2011,31(4):61-66. |
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| Authors: | ZHANG Cui-fang ZHU Li-juan |
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| Institution: | ZHANG Cui-fang1,ZHU Li-juan2(1.College of Communication & Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China2.College of Electronic Science & Engineering,China) |
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| Abstract: | In order to realize high-speed image transmission with high-quality and use minimum wavelet coefficients to display the image,an image compression algorithm is proposed based on two-dimensional wavelet transformation.Firstly,the image is decomposed with two-dimensional wavelet to obtain a series of wavelet coefficients for each subband.Secondly,all wavelet coefficients of low-frequency subband are retained.Thirdly,important coefficients are extracted according to entropy criterion of normalized energy seque... |
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| Keywords: | two-dimensional wavelet transform image compression energy sequence entropy criterion |
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