| 一种基于新的小波阈值函数的图像去噪方法 |
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| 引用本文： | 黄一鹤.一种基于新的小波阈值函数的图像去噪方法[J].传感器与微系统,2011,30(9):76-78,81. |
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| 作者姓名： | 黄一鹤 |
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| 作者单位： | 浙江大学数字技术及仪器研究所,浙江杭州,310027 |
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| 基金项目： | 国家自然科学基金资助项目(61001170) |
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| 摘 要： | 在分析了硬域值、软域值小波去噪算法存在问题的基础上,提出了一个新的域值函数,该阈值函数在整个定义域内统一定义,表达式简单易于计算,同软阈值函数一样具有连续性,且是高阶可导的,便于进行各种数学处理.与硬软域值去噪方法相比,该改进的新阈值函数通过调节参数来调节阈值化小波系数与原始小波系数之间的恒定偏差以及过渡区内曲线的平滑...
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| 关 键 词： | 小波去噪 阈值函数 均方误差 信噪比 |
A method for image denoising based on new wavelet thresholding function |
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| HUANG Yi-he.A method for image denoising based on new wavelet thresholding function[J].Transducer and Microsystem Technology,2011,30(9):76-78,81. |
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| Authors: | HUANG Yi-he |
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| Affiliation: | HUANG Yi-he(Institute of Digital Technology and Instrument,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | On the basis of analysis of the problem of the traditional threshold function,the hard threshold function and the soft threshold function,a new threshold function is proposed.Compared with the traditional thresholding functions,it is more simple in expression,as continuous as the soft-thresholding function,and has a higher order derivative which makes some kinds of mathematical disposals convenient.With this threshold function,through changing the value of the parameters,the constant deviation between thres... |
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| Keywords: | wavelet denoising threshold function mean square error(MSE) signal noise ratio(SNR) |
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