信噪局部方差自适应的小波阈值滤波.pdf

文档介绍：年 月 安徽大学学报 自然科学版
2022 5 ( ) 3-0079-08
Waveletthresholdfilteringbasedonadaptive
localvarianceofsignalandnoise
1,2 1
WANLiyong ,DENG Tian
(,NanchangInstituteofScienceandTechnology,Nanchang330108,China;
,JiangxiNormalUniversity,Nanchang330022,China)
Abstract
:Aimingatremoving Gaussiannoiseand maintainingtheedgeanddetailofthe
imagemoreeffectively,awaveletfilteringmethodbasedonadaptivelocalvarianceofsignal

theimageand Gaussiannoise,this methodproposedanadaptivethresholdbasedonlocal
,inviewofthesmoothcoherenceofwaveletcoefficientsof
noiselessimages,a continuous and differentiable threshold function which infinitely

thecoefficientsofnoisefromthatofimagewiththeintensityofsignalandnoise,andthe
thresholdfunctionprocessedthewaveletcoefficientsquantitatively,withtheaimtoremove