hardthresh.m

denoising image with DWT

function x = HardThresh(y,t)
% HardThresh -- Apply Hard Threshold 
%  Usage 
%    x = HardThresh(y,t)
%  Inputs 
%    y     Noisy Data 
%    t     Threshold
%  Outputs 
%    x     y 1_{|y|>t}
%
	x   = y .* (abs(y) > t);

%
% Copyright (c) 1993-5.  Jonathan Buckheit, David Donoho and Iain Johnstone
%
    
    
    
 
 
%
%  Part of Wavelab Version 850
%  Built Tue Jan  3 13:20:39 EST 2006
%  This is Copyrighted Material
%  For Copying permissions see COPYING.m
%  Comments? e-mail [e-mail]