How can I extract the frame around the windows?

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I need to extract the frame on the wall around the window. How can I do that? I have tried with edge detection and binarization, but I have got always a different result. There are images, where even the edges are not recognizable. But, there are images full with different edges where I can not eliminate the redundant components.
I hope someone can help me.
Thank you.
Image Analyst
Image Analyst on 13 Oct 2019
Could be very difficult if the input could be any window in the world with any aspect ratio, any frame color or pattern and any window color or pattern. Can I ask why you need/want to do this?
Do you have hundreds of images to be used as a training set in deep learning? Would you be willing to use a deep learning approach?

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Accepted Answer

Image Analyst
Image Analyst on 13 Oct 2019
I suggest you just call rbbox(), imrect(), or imcrop() for the simplest solution. Anything else is not going to be "basic".
Image Analyst
Image Analyst on 14 Oct 2019
It's the same except that it "finishes" right away and does not ask you to adjust handles on the edges of the box or ask you to confirm the selection - it just takes it immediately.

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