www.pudn.com > Upload_EZW128.zip > PSNR.M

function  [psnr] = PSNR (A,B) 
% 
%function  [psnr] = psnr (A,B) 
% 
% 
   mse  = mserror(A,B)                   % MMSE 
   if (mse == 0) 
     psnr=Inf; 
   else 
     psnr = 10*log10(255^2/mse);          % PSNR 
   end