st2.m

denoising image with DWT

function out = ST2(Noisy,L,qmf,thresh)
%  ST2 -- Sofd Threshold Applied to Wavelet Coefficients.
%  Usage 
%    out = ST2(Noisy,L,qmf,sigma)
%  Inputs
%    Noisy      2-d signal.
%    L      Low-Frequency cutoff for shrinkage (e.g. L=4)
%               Should have L << J!
%    qmf    Quadrature Mirror Filter for Wavelet Transform
%               Optional, Default = Symmlet 8.
%    thresh Threshold to apply on wavelet coefficients
%  Outputs 
%    out     	estimate, obtained by applying hard thresholding on
%          	 wavelet coefficients	
%

  wcoef = FWT2_PO(Noisy,L,qmf) ;
  wcoefrest = SoftThresh(wcoef,thresh);
  out    = IWT2_PO(wcoefrest,L,qmf);

% Written by Maureen Clerc and Jerome Kalifa, 1997
% [e-mail], [e-mail]

    
    
    
 
 
%
%  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]