How do I select a rectangular region of interest with a hole in it

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Johann Berrangé
Johann Berrangé el 29 de Jun. de 2018
Comentada: KARSH THARYANI el 13 de Jul. de 2018

Hi everyone. Can anyone please advise me on how I can select a rectangular region of interest with a hole in on an image, I wan't to do filtering on this area. So basically if you look at the attached image, I want to select the hatched region in the image and only filter that area with a motion blur filter.

Please don't ask me why, I just need a solution because i can't find anything on the web.

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KARSH THARYANI
KARSH THARYANI el 29 de Jun. de 2018
Given an image, you can make the inner region as zero. Apply the Gaussian (or your motion blur filter). Then, on this image, copy the elements that you made zero.
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Johann Berrangé
Johann Berrangé el 29 de Jun. de 2018
No, there is a specific reason why I cant't do that
KARSH THARYANI
KARSH THARYANI el 13 de Jul. de 2018
May I know that reason, so that I can suggest an appropriate alternative?

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