Filter löschen
Filter löschen

Do variance get increased by increasing SNR?

1 Ansicht (letzte 30 Tage)
Benitta glara
Benitta glara am 9 Mai 2013
I have added SNR of 20 to an image using the below formula of variance
SNR = [var(image)/var(noise)]
var(noise)=var(image)/SNR
in matlab code...
v = var(I(:)) / 10;% SNR=10
I_noisy = imnoise(I, 'gaussian', 0, v);
Is it correct?...

Melden Sie sich an, um diese Frage zu beantworten.

Antworten (1)

Image Analyst
Image Analyst am 9 Mai 2013
No, it's not. Well maybe it might be close if your image was 100% noise and no signal. Otherwise there is no basis for your assumption that the noise is the same as the variance of the image.

Kategorien

Mehr zu Object Analysis finden Sie in Help Center und File Exchange

Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by