| 结合FT与NSCT的自适应阈值去噪算法 |
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| 引用本文： | 李利,杨恢先,何雅丽,冷爱莲,岳许要.结合FT与NSCT的自适应阈值去噪算法[J].计算机工程,2012,38(17):238-241. |
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| 作者姓名： | 李利 杨恢先 何雅丽 冷爱莲 岳许要 |
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| 作者单位： | 湘潭大学信息工程学院;湘潭大学材料与光电物理学院;湘潭大学能源工程学院 |
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| 基金项目： | 湖南省教育厅科研基金资助项目(10C1263);湘潭大学科研基金资助项目(11QDZ11) |
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| 摘 要： | 为更好地对图像进行稀疏表示，以改善去噪效果，提出一种傅里叶变换与非下采样轮廓波变换(NSCT)相结合的自适应阈值去噪算法。在傅里叶域中对含噪图像去噪，在NSCT域中利用分层噪声估计的贝叶斯阈值算法，结合多尺度多方向的能量阈值修正方案自适应地滤除剩余噪声。实验结果表明，该算法的去噪性能较好。
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| 关 键 词： | 图像去噪 傅里叶变换 非下采样轮廓波变换 自适应阈值 贝叶斯框架 |
| 收稿时间： | 2011-11-07 |
| 修稿时间： | 2012-01-09 |
Adaptive Threshold De-noising Algorithm Combined with Fourier Transform and Non-subsampled Contourlet Transform |
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| LI Lia,YANG Hui-xiana,HE Ya-lib,LENG Ai-lianc,YUE Xu-yao.Adaptive Threshold De-noising Algorithm Combined with Fourier Transform and Non-subsampled Contourlet Transform[J].Computer Engineering,2012,38(17):238-241. |
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| Authors: | LI Lia YANG Hui-xiana HE Ya-lib LENG Ai-lianc YUE Xu-yao |
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| Affiliation: | b(a.College of Information Engineering;b.Faculty of Materials,Optoelectronics and Physics;c.College of Energy Engineering,Xiangtan University,Xiangtan 411105,China) |
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| Abstract: | In order to express a sparse image better and achieve better de-noising effect,an adaptive threshold de-noising algorithm combined with Fourier Transform(FT) and Non-subsampled Contourlet Transform(NSCT) is proposed.The noisy image is de-noised in Fourier domain,and the remaining noise is filtered out in NSCT domain.It is based on stratified noise estimation and adaptive Bayes threshold,combined with a flexible multi-scale and multi-directional energy correction threshold scheme.Experimental results show that the proposed algorithm can improve de-noising performance. |
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| Keywords: | image de-noising Fourier Transform(FT) Non-subsampled Contourlet Transform(NSCT) adaptive threshold Bayes frame |
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