| 基于自适应阈值的小波消噪算法研究及应用 |
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| 引用本文： | 毛海杰,陈晓辉,李炜.基于自适应阈值的小波消噪算法研究及应用[J].甘肃科学学报,2008,20(2):116-119. |
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| 作者姓名： | 毛海杰 陈晓辉 李炜 |
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| 作者单位： | 兰州理工大学电气工程与信息工程学院.甘肃,兰州,730050 |
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| 基金项目： | 教育部春晖计划项目
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兰州理工大学重点特色梯队建设项目 |
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| 摘 要： | 基于小波多尺度分解的阈值方法是一种有效的信号去噪方法．应用最为广泛的是Donoho阈值法，但由于其阈值为全局阈值，不能在每级尺度上将信号与噪声做最大分离，去噪效果并不理想．在分析Donoho硬阈值和软阈值方法特点的基础上，提出了一种新的自适应阈值消噪方法，结合了硬阈值和软阈值方法的优点，仿真试验和工程实例均证明了该方法优于传统的阈值消噪方法．
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| 关 键 词： | 小波多尺度分解 阈值消噪 管道泄漏 |
Study of Wavelet De-noising Algorithm and Its Application Based on Adaptive Thresholding Method |
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| MAO Hai-jie,CHEN Xiao-hui,LI Wei.Study of Wavelet De-noising Algorithm and Its Application Based on Adaptive Thresholding Method[J].Journal of Gansu Sciences,2008,20(2):116-119. |
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| Authors: | MAO Hai-jie CHEN Xiao-hui LI Wei |
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| Institution: | College of Electrical Engineering and Information Engineering;Lanzhou University ofSicence and Technology;Lanzhou 730050;China |
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| Abstract: | An effective method to reduce the noise in signals is based on wavelet multiscale decomposition.The thresholding de-noising proposed by Donoho is a standard wavelet de-noising method.But it has some disadvantages.Based on Donoho's method,an improved wavelet de-noising method with adaptive thresholding is given,which has both advantages of hard-thresholding and soft-thresholding.The simulation experiment and project practice indicate that the proposed method is better than traditional wavelet thresholding de... |
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| Keywords: | wavelet multiscale decomposition thresholding de-noising pipeline leakage |
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