How to specify the cropping area of an image with matlab?

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Sterne_17
Sterne_17 le 29 Déc 2022
Réponse apportée : Image Analyst le 29 Déc 2022
I have got the grayscale map after edge detection using the canny algorithm, and I need to crop a part of the image. But I don't know the coordinates of the top left and bottom right corners of the cropping area (rectangle). How do I determine the coordinate values of these two points?

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Image Analyst
Image Analyst le 29 Déc 2022
See the attached drawrectangle demo.
Demos for other shapes are also attached.

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