opencv/imgproc.go
func BoundingRect(points unsafe.Pointer) Rect {
	return (Rect)(C.cvBoundingRect(points, C.int(0)))
}
func BoundingRect(points unsafe.Pointer) Rect {
	return (Rect)(C.cvBoundingRect(points, C.int(0)))
}
// Calculates up-right bounding rectangle of point set
// points can be either CvSeq* or CvMat*