| 基于小波变换的改进阈值函数自适应去噪方法 |
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| 引用本文： | 周怀来,李录明,罗省贤,李枚.基于小波变换的改进阈值函数自适应去噪方法[J].物探化探计算技术,2006,28(2):173-177. |
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| 作者姓名： | 周怀来 李录明 罗省贤 李枚 |
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| 作者单位： | 1. 成都理工大学,信息工程学院,成都,610059
2. 攀枝花学院,攀枝花,617000 |
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| 摘 要： | 在多分辨分析小波阈值去噪方法的基础上3],用一种改进的阈值函数和自适应阈值选取算法相结合的方法,克服了硬阈值法不连续性和软阈值法有偏差的缺点。该方法能自动跟踪噪声,不同尺度自适应采用不同的阈值,可有效去除每一尺度上的噪声,保留有用信号,提高信噪比。仿真实验和地震资料处理结果表明,该方法去噪效果明显,可在各类消除随机噪声的信号处理中发挥作用。
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| 关 键 词： | 小波变换 小波阈值去噪 自适应阈值 阈值函数 均方误差 信噪比 |
| 文章编号： | 1001-1749(2006)02-0173-05 |
| 收稿时间： | 06 13 2005 12:00AM |
| 修稿时间： | 2005年6月13日 |
A METHOD OF IMPROVED THRESHOLD FUNCTION DENOISING BASED ON WAVELET ANALYSIS |
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| ZHOU Huai-lai,LI Lu-ming,LUO Sheng-xian,et al..A METHOD OF IMPROVED THRESHOLD FUNCTION DENOISING BASED ON WAVELET ANALYSIS[J].Computing Techniques For Geophysical and Geochemical Exploration,2006,28(2):173-177. |
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| Authors: | ZHOU Huai-lai LI Lu-ming LUO Sheng-xian |
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| Abstract: | Based on the Multi-analysis wavelet threshold method which put forward by D.L.Donoho and I.M.Johnstone,a method integrated with an algorithm of the adaptive threshold selection,is used to overcome the shortcoming of discontinuity of Hard-threshold method and dispersion of the Soft-threshold method.This method can track the noise automatically,adopt the different adaptive threshold in different scale,get rid of a great deal noise in every scale,save useful signals,and further to improve the signal-noise-ratio.Simulation experiments and the results of seismic data processing show the method can get obvious denoising effect,and make it possible to embody the function in all sorts of signal processing of eliminating random noise. |
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| Keywords: | wavelet transform wavelet threshold denoising threshold MSE SNR |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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