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How to apply a rectangular on images?

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Faranak on 10 Jan 2015
Closed: MATLAB Answer Bot on 20 Aug 2021
I want to apply a rectangular on an image. First I want to click on the image and give the program a point and then apply the rectangular on the image, the point will be the center of the rectangular. after that I want to have the pixel value of the selected area. what should I do?
I found this in other questions: h=imrect(gca,[10 10 100 100]) it will apply rectangular h on the image, how can I give the point by just clicking on the image by myself since I do not know the start point for rectangular, this rectangular will start from point (10 10), I want the point which I select be the center of the rectangular not the starting point. and after that I want to work on the pixel value of pixels inside the rectangular. what should I do?

Answers (1)

Image Analyst
Image Analyst on 10 Jan 2015
Why not just call imcrop()?
Image Analyst
Image Analyst on 11 Jan 2015
You either crop it, and work on the sub image, or you don't and need to take care to never have indexes outside row1, row2, col1, and col2. Either way, I don't care.

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