| 基于四种改进阈值的小波去噪方法 |
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| 引用本文： | 董永生,羿旭明.基于四种改进阈值的小波去噪方法[J].数学杂志,2006,26(5):473-477. |
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| 作者姓名： | 董永生 羿旭明 |
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| 作者单位： | 武汉大学数学与统计学院,湖北武汉,430072 |
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| 基金项目： | Supported by the National Natural Science Foundation of China (19602014) . |
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| 摘 要： | 本文提出了四种改进的阈值函数,并且在理论上证明了这四种改进的阈值函数对脉冲噪声都是有效的.仿真实验显示:无论是信噪比还是最小平方误差,改进的软阈值函数比其它三种改进的阈值函数的效果都要好一些.
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| 关 键 词： | 阈值 离散小波变换 去噪 |
| 文章编号： | 0255-7797（2006）05-0473-05 |
| 收稿时间： | 2004-11-18 |
| 修稿时间： | 2004-11-182005-01-24 |
WAVELET DENOISING BASED ON FOUR IMPROVED FUNCTIONS FOR THRESHOLD ESTIMATION |
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| DONG Yong-sheng,YI Xu-ming.WAVELET DENOISING BASED ON FOUR IMPROVED FUNCTIONS FOR THRESHOLD ESTIMATION[J].Journal of Mathematics,2006,26(5):473-477. |
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| Authors: | DONG Yong-sheng YI Xu-ming |
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| Institution: | School of Math. and Statistics, Wuhan University, Wuhan 430072 ,China;School of Math. and Statistics, Wuhan University, Wuhan 430072 ,China |
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| Abstract: | This paper presents four improved thresholding functions.They are theoretically proved to be effective to denoise impulsive noise.Simulations show that the improved soft-thresholding function is obviously better than the other three improved thresholding functions in terms of SNR and MSE. |
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| Keywords: | threshold DWT denoise |
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