How to compute variance of image in windows?
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I read a paper about Guided Image Filtering. For edge preserving:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/208559/image.png)
where
is defined as the variance of input image whose centre is
.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/208560/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/208561/image.png)
How to compute it in Matlab?
Thankyou.
2 commentaires
Bjorn Gustavsson
le 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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