if i normalize signal power of noisy image
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I is original image and 'n' is noise image and it add in I to generate noisy image('mix'),means
mix=I+n;
if i normalize signal power of noisy image as mean2(I) means
P(signal)=mean(I)
if i normalize noise power of noisy image as std2(n) means
P(noise)=std2(n)
then i define normalized snr as
snr=P(signal)/P(noise)
is this problematic or right?
I have studied snr=mean(I./n),but this is another way
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Answers (1)
Image Analyst
on 2 Feb 2013
That's not correct. You're better off doing the pixel by pixel ratio and then taking the mean, like your latter method. Mathematically they are not the same.
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