| 基于小波-Contourlet变换的图像增强算法 |
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| 引用本文： | 殷兵,于梅,方洁,梁栋.基于小波-Contourlet变换的图像增强算法[J].计算机工程与设计,2008,29(12). |
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| 作者姓名： | 殷兵 于梅 方洁 梁栋 |
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| 作者单位： | 1. 安徽大学计算智能与信号处理教育部重点实验室,安徽,合肥,230039
2. 安徽大学计算智能与信号处理教育部重点实验室,安徽,合肥,230039;安徽大学,电子科学与技术学院,安徽,合肥,230039 |
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| 基金项目： | 国家自然科学基金
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安徽省自然科学基金
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安徽省自然科学基金
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安徽省教育厅自然科学基金 |
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| 摘 要： | 小波-Contourlet变换能够良好捕获图像的方向特征和边缘信息.利用小波-Contourlet变换良好的多尺度性和多方向性特征,提出一种基于小波-Contourlet变换的图像增强算法,用非线性增强算子对变换的各子带系数做增强处理.并引入了循环平移消除由于小波-Contourlet变换缺乏平移不变性而产生的图像失真.实验结果表明,该方法有效增强了图像的边缘细节和纹理特征.
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| 关 键 词： | 图像增强 小波-Contourlet变换 非线性增强算子 循环平移 平移不变性 |
Image enhancement using wavelet based contourlet transform |
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| YIN Bing,YU Mei,FANG Ji,LIANG Dong.Image enhancement using wavelet based contourlet transform[J].Computer Engineering and Design,2008,29(12). |
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| Authors: | YIN Bing YU Mei FANG Ji LIANG Dong |
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| Affiliation: | YIN Bing1,YU Mei1,FANG Jie1,LIANG Dong1,2(1.Educational Department Key Lab of IC&SP,Anhui University,Hefei 230039,China,2.School of Electronic Science , Technology,China) |
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| Abstract: | A new algorithm of image enhancement using wavelet based contourlet transform is proposed.Wavelet based contourlet trans-form is applied for its good property of capturing image's edges and texture.A non-linear operator is used to enhance the coefficients of the transform.Because the transform is not shift-invariant,cycle spinning is employed to restrain the distortion near the image edges.The experiments show that the algorithm proposed gets good results and enhances the image's details and texture. |
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| Keywords: | image enhancement wavelet based contourlet transform non-linear operator cycle spinning shift-invariant |
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