从整体图像中获取轮廓的像素坐标

Question

So I would like to get the XY coordinates of the center of a contour on an image. How would I go about this?

I have the contours defined and the objects detected now how do I get the pixel XY of the center.

Answer 1

Get the normal vectors at the start and end of the contour and calculate their intersection.

^ is for a simple 3 point contour ie a circular arc. If you have more points, "center" is a kinda ambiguous term, but if you averaged all points contributing to the contour it could give you a center of mass which may be what you are after.

You could also get bounding boxes or circle etc as described here

You could also use the moments to get center of mass if you prefer as seen on the documentation :