Sign in
Search code
See Also
DSP Code Sharing > Image denoising -Bayeshrink threshold calculation
Image denoising -Bayeshrink threshold calculation
Language: Matlab
Processor: Not Relevant
Submitted by Senthilkumar R on Jul 30 2011
Licensed under a Creative Commons Attribution 3.0 Unported License
Image denoising -Bayeshrink threshold calculation
This function used to calculate the threshold used for bayesoft image denoising method
function T = bayeshrink(CD,CV)
[m,n] = size(CD);
sigma = (median(median(abs(CD))))/0.6745; %Standard deviation
var_sig = std_sig^2; % Variance
mean_sig = mean(mean(CH)); %mean value
sigmax = var_sig-(mean_sig^2);
sigmas = sqrt(max((sigmax-(sigma^2)),0));
%Calculation of threshold
if sigmas ~=0
T = ((sigma)^2)/(sigmas);
elseif sigmas == 0
T = max(max(abs(CV)));
end
[m,n] = size(CD);
sigma = (median(median(abs(CD))))/0.6745; %Standard deviation
var_sig = std_sig^2; % Variance
mean_sig = mean(mean(CH)); %mean value
sigmax = var_sig-(mean_sig^2);
sigmas = sqrt(max((sigmax-(sigma^2)),0));
%Calculation of threshold
if sigmas ~=0
T = ((sigma)^2)/(sigmas);
elseif sigmas == 0
T = max(max(abs(CV)));
end
posted by Senthilkumar R Comments
lyxahu wrote:
8/12/2011
minkalpatel wrote:
1/24/2012
but i have a difficulty in below statement
var_sig = std_sig^2;
here i can understand the how to get value of std_sig .please help me in this
Add a Comment
You need to login before you can post a comment (best way to prevent spam). ( Not a member? )