| 小波去噪中对模极大值的处理 |
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| 引用本文： | 王斌,田金文,彭复员.小波去噪中对模极大值的处理[J].华中科技大学学报(自然科学版),1997(11). |
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| 作者姓名： | 王斌 田金文 彭复员 |
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| 作者单位： | 华中理工大学电子与信息工程系 |
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| 摘 要： | 分析信号和噪声的奇异指数，根据函数不同的奇异指数小波变换的局部模极大值具有不同的传播特性的理论，在相邻模极小构成的待选通域中对分析出的噪声局部模极大值所在的选通域进行平滑处理，反变换重建出去噪信号．实验结果表明这种方法计算简单且有较好的去噪效果．
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| 关 键 词： | 小波变换 模极大值 奇异指数 |
Processing of Module Maximum Value in Wavelet Denoising |
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| Wang Bin Dept. of Electronics & Information Eng.,HUST,Wuhan ,China. Tian Jinwen Peng Fuyuan.Processing of Module Maximum Value in Wavelet Denoising[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1997(11). |
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| Authors: | Wang Bin Dept of Electronics & Information Eng HUST Wuhan China Tian Jinwen Peng Fuyuan |
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| Institution: | Wang Bin Dept. of Electronics & Information Eng.,HUST,Wuhan 430074,China. Tian Jinwen Peng Fuyuan |
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| Abstract: | The singular index of the signal and noise is analyzed. According to the theory that the functions with different singular index have different spreading characteristic of local module maximum value in wavelet transform, the gating regions where the local module maximum values of noise have been found by analysis are smoothed. The gating regions to be are composed by two module minimum value adjacent to the selected module maximum value. The denoised signals are then reconstructed by inverse wavelet transform. Experiments show that the method is simple and the denoising result is good. |
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| Keywords: | wavelet transform module maximum value singular index |
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