calculating PSNR

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kash
kash 2012-3-21
I have two images original image and compressed image,please tell how to calculate mean square error and psnr

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Image Analyst
Image Analyst 2012-3-21
Did you see the formula at http://en.wikipedia.org/wiki/PSNR? Of course you can just subtract the images and use the sum() function instead of the loops, which I know you know how to do. Just make sure you use .^2 instead of ^2 because you want an element-by-element squaring. Give it a try - it's just one line of code.
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Image Analyst
Image Analyst 2012-3-21
Looks like it should be as long as origImg & compImg are floating point images and not uint8 or uint16. I was thinking of something like
MSE = mean2((single(image1) - single(image2)).^2);
kash
kash 2012-3-22
Thanks MR.Analyst

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Wayne King
Wayne King 2012-3-21
The Wavelet Toolbox has a function for this, measerr()
>>doc measerr
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kash
kash 2012-3-21
Wayne i am getting page not found,am using 2010a
Wayne King
Wayne King 2012-3-21
introduced in R2010b

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