| 最大似然估计阈值法对超声回波消噪的研究 |
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| 引用本文： | 张小丽,梁波. 最大似然估计阈值法对超声回波消噪的研究[J]. 许昌师专学报, 2008, 0(5): 58-60 |
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| 作者姓名： | 张小丽 梁波 |
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| 作者单位： | 合作民族师范高等专科学校自然科学系,甘肃合作747000 |
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| 摘 要： | 针对超声脉冲信号具有的概率密度稀疏分布特性，提出了基于离散小波变换的最大似然估计阈值处理法，并与现有的软阈值处理消噪相比较，表明该方法效果良好．
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| 关 键 词： | 离散小波变换 最大似然估计 软阈值 概率密度 稀疏分布 |
De- noising of Ultrasonic Echo based on Maximum Likelihood Estimation Thresholding Method |
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| ZHANG Xiao-li,LIANG Bo. De- noising of Ultrasonic Echo based on Maximum Likelihood Estimation Thresholding Method[J]. Journal of Xuchang Teachers College(Social Science Edition), 2008, 0(5): 58-60 |
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| Authors: | ZHANG Xiao-li LIANG Bo |
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| Affiliation: | (Department of Natural Science, Hezuo Minorities .Teachers＇ College ,Hezuo 747000, China) |
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| Abstract: | For sparse distribution of probability density of ultrasonic impulse signal, maximum likelihood esti- mation thresholding method based on discrete wavelet transform is put forward. This method is proved efficient compared with the existing method of soft threshold. |
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| Keywords: | discrete wavelet transform maximum likelihood estimation softthresholding probability density sparse distribution |
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