www.pudn.com > multiwavelet.rar > postp2D_appe.m

function fhat=postp2D_appe(fhatp,pflt) 
%fhat=postp2D_appe(fhatp,pflt) 
% 
%  This function performs critically sampled postprocessing of reconstructed  
%  preprocessed 2-dimensional signal. Boundaries are handled by periodic  
%  extension. For details see [SW]. 
% 
%  Input:  
%    pflt       string of characters, name of the prefilter; 
%               for possible names and short descriptions see coef_prep.m 
%    fhatp      n by n real array, reconstructed preprocessed signal;  
%               for structure of fhatp see [SW] 
% 
%  Output:  
%    fhat       n by n real array, reconstructed signal  
% 
%  Example of Usage: 
%    fhat=postp2D_appe(fhatp,'clap') 
 
% Author: Vasily Strela 
% COPYRIGHT 1997,98 by Vasily Strela 
 
[PR,PO]=coef_prep(pflt); 
[n1,n2]=size(fhatp); 
fhat=zeros(n1,n2); 
[nf,np]=size(PO); 
 
prl=round(n1/nf); 
aa=zeros(nf,prl); 
for i=1:n2 
  for j=1:nf 
    aa(j,:)=fhatp((j-1)*prl+1:j*prl,i)'; 
  end 
  fhat(:,i)=(postp1D_appe(aa,pflt))'; 
end 
 
prl=round(n2/nf); 
aa=zeros(nf,prl); 
for i=1:n1 
  for j=1:nf 
    aa(j,:)=fhat(i,(j-1)*prl+1:j*prl); 
  end 
  fhat(i,:)=postp1D_appe(aa,pflt); 
end