| 小波阈值去噪中新的阈值函数的研究 |
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| 引用本文： | 李敏. 小波阈值去噪中新的阈值函数的研究[J]. 长春理工大学学报(自然科学版), 2011, 34(3) |
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| 作者姓名： | 李敏 |
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| 作者单位： | 辽宁石油化工大学信息与控制工程学院,抚顺,113001 |
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| 摘 要： | 基于小波变换的阈值去噪算法,需采用阈值函数对小波系数进行非线性的处理。本文在分析了硬阈值函数和软阈值函数各自特性的基础上,提出了一种新的阈值函数,该阈值函数克服了软、硬阈值函数的缺陷,连续、可导,且减小了偏差,函数中调节因子m可以改变阈值函数的趋向,使阈值函数具有较大的灵活性。仿真结果表明新的阈值函数的可行性及有效性。
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| 关 键 词： | 小波变换 阈值去噪 阈值函数 |
Research of New Thresholding Function in Wavelet Threshold Denoising |
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| LI Min. Research of New Thresholding Function in Wavelet Threshold Denoising[J]. Journal of Changchun University of Science and Technology, 2011, 34(3) |
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| Authors: | LI Min |
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| Affiliation: | LI Min(School of Information and Control Engineering of LiaoNing ShiHua University,LiaoNing FuShun,113001,China) |
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| Abstract: | Wavelet coefficients need to be processed non-linearly with the help of thresholding function in threshold de-noising algorithm based on wavelet transform.Based on the analysis of hard thresholding function and soft thresholding function on the basis of their features,this paper proposes a new thresholding function,the thresholding function contin-uous,derivatives and reduced deviation.Adjustment factor can change the trend,with great flexibility.Simulation results show the feasibility and effectiveness of ... |
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| Keywords: | wavelet transform threshold denoising thresholding function |
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