| 基于半软阈值NSCT的图像去噪 |
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| 引用本文： | 陈力,林颖.基于半软阈值NSCT的图像去噪[J].汕头大学学报(自然科学版),2008,23(2):56-61. |
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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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| 基金项目： | 国家自然科学基金
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广东省自然科学基金 |
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| 摘 要： | 提出一种基于非降采样Contourlet变换(NSCT)和半软阈值的图像去噪方法.先在原有的全局阈值处理方法基础上,针对NSCT的特点,重新选定阈值参数,然后再将半软阈值法与NSCT相结合去噪.实验结果表明,该方法能够在去噪后的图像中消除一般Contourlet变换时由于不具有平移不变性而产生的伪吉布斯现象,并且在保存了更好的边缘和纹理特征的同时又不失平滑.
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| 关 键 词： | 非降采样Contourlet变换 平移不变性 图像去噪 半软阈值 伪吉布斯现象 |
| 文章编号： | 1001-4217(2008)02-0056-06 |
| 修稿时间： | 2007年11月16 |
Image De-Noising Based on Half-Soft Threshold NSCT |
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| CHEN Li,LIN Ying.Image De-Noising Based on Half-Soft Threshold NSCT[J].Journal of Shantou University(Natural Science Edition),2008,23(2):56-61. |
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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: | A new image de-noising method is proposed based on nonsubsampled contourlet transform（NSCT） with half-soft threshold. In the experiment, the global threshold parameters are changed and half-soft thresholds are added to NSCT. It is shown that the proposed method can eliminate the pseudo-Gibbs de-noised images preserve more features phenomena caused by contourlet transform. The around edges and textures, and the smoothness in the images is kept. |
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| Keywords: | nonsubsampled contourlet transform shift-invariance image de -noising half-soft threshold pseudo-Gibbs phenomena |
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