that actual snr is
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
one person say me that actual snr is,,,
if noiseImage=noisyImage-originalImage then actual snr=mean(originalImage./abs(noiseImage)) so my question is that "Is snr depends on mean and variance of noiseImage"?
0 Kommentare
Antworten (1)
Image Analyst
am 29 Dez. 2012
Yes. More noise = lower SNR, and less noise = higher SNR.
3 Kommentare
Image Analyst
am 29 Dez. 2012
Because the absolute value of the noise image is being taken, the std dev affects the mean. You could have a mean of zero in the original noise, but once you take the abs(), now the mean depends on the std dev. So the SNR of an image with noise = 0 +/- 5 gray levels will be higher than the SNR of the same image with a noise of 0 +/- 200 gray levels.
Siehe auch
Kategorien
Mehr zu Image Filtering and Enhancement finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!