计算机工程与应用Issue(22)：212-214,3.DOI:10.3778/j.issn.1002-8331.1301-0298
一种改进的小波阈值函数去噪方法
Denoising method of wavelet threshold function improvement
摘要
Abstract
This paper studies the advantages and disadvantages of hard threshold denoising and soft threshold denoising for wavelet denoising proposed by D.L.Donoho and I.M.Johnstone. And construct a new threshold function, it overcomes the point of discontinuity and soft threshold function derivative discontinuous shortcoming of the hard threshold processing method in λ, but also the high order derivative, can retain big wavelet coefficient in the actual application, so as to preserve the signal as much, so to obtain better denoising effect. The simulation results show that, the new threshold function can effectively restrain the noise, the noise of the signal to noise ratio and root mean square error is better than soft and hard threshold function and sev-eral improved threshold function, has a high practical value.关键词
小波/去噪/阈值函数/信噪比Key words
wavelet/denoising/threshold function/Signal to Noise Ratio(SNR)分类
信息技术与安全科学引用本文复制引用
赵银善,吐尔洪江·阿布都克力木..一种改进的小波阈值函数去噪方法[J].计算机工程与应用,2013,(22):212-214,3.基金项目
国家自然科学基金资助项目（No.11261061，No.10661010，No.61362039）；新疆维吾尔自治区自然科学基金资助项目（No.200721104）。 （）
