check.m

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%a,b 为inputf的size
%dctcompr('lean.tif',2000,'out.tif');

function [PSNR]=check(Outf,Inputf,a,b)
  Outf=double(Outf);  Inputf=double(Inputf);
    
%load test
%load asd

SQRT=0;
for i=1:a
    for j=1:b
        SQRT=SQRT+(double(Inputf(i,j))-double(Outf(i,j)))^2;
    end
end
MSE=SQRT/a/b;
RMSE=sqrt(MSE);
LINE=zeros(1,a*b);
for i=1:a
    LINE=[LINE,double(Inputf(i,:))];
end
VAR=var(LINE);
SNR=10*log10(VAR/MSE);
PSNR=20*log10(255/RMSE);
return ;
beep on;
beep;