Info
Diese Frage ist geschlossen. Öffnen Sie sie erneut, um sie zu bearbeiten oder zu beantworten.
tthis right way to find
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
a=sqrt(0.5)*randn(400)
snr=1/0.5 %0.5 is variance and signal=1 consider as normalized
snrdb=10*log(snr)
is this right way to find actual snr wnen i add 'a' marix as noise in a original image.(becuase i needs to add different variance noise in original images and comparing result)
0 Kommentare
Antworten (1)
Matt J
am 28 Dez. 2012
Bearbeitet: Matt J
am 28 Dez. 2012
It's the right way assuming the "original image" satisfies signal=1, however it is that you're measuring that.
4 Kommentare
Image Analyst
am 28 Dez. 2012
For background, Matt, he has asked essentially this same question 14 times (yes, fourteen) times this month as separate postings - how to get the signal-to-noise ratio when you don't know the signal and you don't know the noise, all you know is the actual noisy signal and sometimes what specific SNR you want. See his profile.
Matt J
am 28 Dez. 2012
Yes, I've seen the similarity in his questions. Wasn't sure they were identical, though.
Diese Frage ist geschlossen.
Siehe auch
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!