How to compute P.S.N.R value for the below set of images?
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I would request anybody to provide me with code to compute the PSNR value for the below pair of images. I want to compare output1.png with o.png, o2.png with output2.png? Please help?
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Thomas Koelen
2015-5-12
If you have the image processing toolbox you can use the function:
peaksnr = psnr(A,ref)
where A is your output1 and ref is o.
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Sandeep V
2015-5-12
编辑：Image Analyst
2015-5-13
Thomas Koelen
2015-5-12
编辑：Thomas Koelen
2015-5-12
Can you run this:
v = ver;
any(strcmp('Image Processing Toolbox', {v.Name}))
and post results? What version of matlab do you have?
Edit: just read that you have 2010a, I don't think peaksnr is present in that build.
I suggest you try one of the following:
or you could code it yourself:
X = double(X);
Y = double(Y);
m = sum((X(:)-Y(:)).^2) / prod(size(X));
psnr = 10*log10(255*255/m);
However, instead of assuming the peak is 255, you should use max(X(:)) as the peak.
Sandeep V
2015-5-13
Image Analyst
2015-5-13
Of course not. psnr is a measure of how close two images are to each other, not an overall assessment of which image is "better".
Sandeep V
2015-5-13
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