centroid ellipse MSER OPENCV

Question

I am working on an image registration method and I would like to work with region based feature detectors. As representative and because it is already implemented in opencv, i thought of MSER.

I know how to detect the MSER regions.MSER detector gives the MSER regions inside of a vector of points, a contour.I would like to retrieve the centroid of these contours. I could fit a ellipse on them, but then I don't as well how could I retrieve the centroid of these ellipses. Does someone know if there is an already implemented function that could take care of this task? Or do i have to develop an algorithm?

The reason is that I would like to perform the point correspondence using this centroid points as interesting points.

Thanks

Iván

Answer 1

The centroid of the region can be computed by calculating the mean of all the x values and the mean of all the y values. The resulting (meanX, meanY) point is the region's centroid.