| 基于非采样Contourlet与全变差模型的图像去噪 |
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| 引用本文： | 陈力,林颖.基于非采样Contourlet与全变差模型的图像去噪[J].汕头大学学报(自然科学版),2009,24(1):62-68. |
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| 作者姓名： | 陈力 林颖 |
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| 作者单位： | 汕头大学电子工程系,广东,汕头,515063 |
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| 摘 要： | 分析非采样Contourlet与全变差滤波器在图像去噪中的特点,提出一种基于图像全变差模型的非线性扩散与非采样Contourlet相结合的自适应混合图像去噪算法.该算法在中、低频部分采用全变差扩散,在高频部分采用非采样Contourlet变换,并在此基础上用半软阈值法取代软阈值法.实验结果表明,该算法能够在降低复杂度的同时得到好的滤波效果.
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| 关 键 词： | 图像去噪 非采样Contourlet 全变差 半软阈值法 |
Half-Soft Threshold Image De-noising Algorithm Based on Nonsubsampled Contourlet Transform and Total Variation |
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| CHEN Li,LIN Ying.Half-Soft Threshold Image De-noising Algorithm Based on Nonsubsampled Contourlet Transform and Total Variation[J].Journal of Shantou University(Natural Science Edition),2009,24(1):62-68. |
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| Authors: | CHEN Li LIN Ying |
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| Institution: | (Department of Electrical Engineering, Shantou University, Shantou 515063, Guangdong, China) |
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| Abstract: | The features of nonsubsampled Contourlet transform（NSCT）and total variation （TV） in image de-noising were studied. An adapted hybrid image de-noising algorithm is proposed based on TV diffusion and NSCT. The TV diffusion was applied to the medium and low frequency parts of image decomposed by NSCT. A half-soft threshold other than the soft threshold was used to shrink the high frequency parts. Experiment results show that the de-noising performance was improved by the proposed algorithm. |
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| Keywords: | image de-noising nonsubsampled contourlet transform total variation half-soft threshold |
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