psnr.rar_PSNR_图像 psnr

%Name: Chris Shoemaker %Course: EER-280 - Digital Watermarking %Project: Calculates the PSNR (Peak Signal to Noise Ratio) % of images A and A', both of size MxN function result = psnr(Refer,UnRefer,lHeight,lWidth) result = 0; for j=1:lWidth*lHeight temp = Refer(j)-UnRefer(j); result = result + double(temp*temp); end; if(result==0) result =100; else result = 10*log10(255*255/result*lWidth*lHeight); end;