清空筛选条件
清空筛选条件

Do variance get increased by increasing SNR?

1 次查看（过去 30 天）
Benitta glara
Benitta glara 2013-5-9
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?...

请先登录，再回答此问题。

回答（1 个）

Image Analyst
Image Analyst 2013-5-9
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.

类别

在 Help Center 和 File Exchange 中查找有关 Object Analysis 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by