opencv/cxtype.go
func (r *Rect) BR() Point {
	return Point{int(r.x) + int(r.width), int(r.y) + int(r.height)}
}
func (r *Rect) BR() Point {
	return Point{int(r.x) + int(r.width), int(r.y) + int(r.height)}
}
// Returns the Bottom-Right Point of the rectangle