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I am using Wiener filter for deblurring an image.
http://www.mathworks.it/it/help/images/ref/deconvwnr.html
The important snippet is here:
estimated_nsr = noise_var / var(I(:));
wnr3 = deconvwnr(blurred_noisy, PSF, estimated_nsr);
The problem is that deconwnr needs an estitmate of NSR calculated with the original image I.
But I don’t have the original image, I have only the blurred_noisy image.
What value should I pass as estmated_nsr?
If NSR is Noise to Signal Ratio then wouldn’t you have to just guess at how noisy the original image was?
So you could use NSR=0 and assume there is no noise on the original image.