How to compute variance of image in windows?

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Yohanes Setiawan on 15 Mar 2019

Commented: Bjorn Gustavsson on 15 Mar 2019

I read a paper about Guided Image Filtering. For edge preserving:

where

is defined as the variance of input image whose centre is

How to compute it in Matlab?

Thankyou.

KSSV on 15 Mar 2019

Read about var

Bjorn Gustavsson on 15 Mar 2019

If you have the image-processing toolbox have a look at wiener2:

edit wiener2

In there you can see how the local variance is calculated.

HTH

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