IMAGE DENOISING USING BAYES THRESHOLDING OF WAVELET COEFFICIENTS: threshold=bayes(X,sigmahat) - File Exchange

No BSD License

Highlights from
IMAGE DENOISING USING BAYES THRESHOLDING OF WAVELET COEFFICIENTS

WPSNR(A,B,varargin) This function computes WPSNR (weighted peak signal-to-noise ratio) between
op=sthresh(X,T); A function to perform soft thresholding on a
rmse=compare11(f1,f2,scale)
threshold=bayes(X,sigmahat) Function to calculate Threshold for BayesShrink
raomain.m
View all files

from IMAGE DENOISING USING BAYES THRESHOLDING OF WAVELET COEFFICIENTS by aaa asdfgh
this work is aimed to implement bayes thresholding.

threshold=bayes(X,sigmahat)

% Function to calculate Threshold for BayesShrink

function threshold=bayes(X,sigmahat)

len=length(X);
sigmay2=sum(X.^2)/len;
sigmax=sqrt(max(sigmay2-sigmahat^2,0));
if sigmax==0 threshold=max(abs(X));
else threshold=sigmahat^2/sigmax;
end

Highlights from IMAGE DENOISING USING BAYES THRESHOLDING OF WAVELET COEFFICIENTS

Highlights from
IMAGE DENOISING USING BAYES THRESHOLDING OF WAVELET COEFFICIENTS