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I used warpAffine in OpenCV to rotate a rectangle. Now I want to get the four vertices (the x and y locations of four points) of this rotated rectangle without rotating it back. After hours of search, I came up with no result. Could someone help me on this? Thank you.

E_learner
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1 Answers1

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Like this:

cv::RotatedRect RotRect;
// Fill in RotRect somehow...

//Get four corners
cv::Point2f pts[4];
RotRect.points(pts);

The documentation also has an example.

David Nilosek
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