Rotating an Image and Keeping the Bounding Box in Registration

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Chris Williams 2015-9-14

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https://ww2.mathworks.cn/matlabcentral/answers/242808-rotating-an-image-and-keeping-the-bounding-box-in-registration

回答： Chris Williams 2015-9-14

I have an image, a small part of which is surrounded by a bounding box. I rotate the whole image x degrees. How can I also rotate the bounding box by the same angle, thus keeping the bounding box in registration?

I tried the following:

     bbox = [10 20 50 60];
     points = bbox2points(bbox);

Apply a rotation to the points using affine2d and transformPointsForward (a simple rigid rotation). However, I cannot convert the list of points back to a bounding box. Thanks for your help.

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Answer 1

Chris Williams 2015-9-14

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/242808-rotating-an-image-and-keeping-the-bounding-box-in-registration#answer_192237

If this is too difficult, I can restrict the transformation of the image to flipud and fliplr. I just need to then apply the same flip to the bounding box.