:param keypoints:Keypoints obtained from any feature detection algorithm like SIFT/SURF/ORB
:param points2f:Array of (x,y) coordinates of each keypoint
:param keypointIndexes:Array of indexes of keypoints to be converted to points. (Acts like a mask to convert only specified keypoints)
:param _size:keypoint diameter
:param _response:keypoint detector response on the keypoint (that is, strength of the keypoint)
@ -671,15 +671,15 @@ KeyPoint::overlap
This method computes overlap for pair of keypoints. Overlap is the ratio between area of keypoint regions' intersection and area of keypoint regions' union (considering keypoint region as circle). If they don't overlap, we get zero. If they coincide at same location with same size, we get 1.