'Draw the current image with points using
OpenCV\'s own drawing functions.
Press ant key to close window.'

def draw(self):

    for point in self.features:
        cv2.circle(self.image, (int(point[0][0]), int(point[0][1])), 3, (0, 255, 0), (-1))
    cv2.imshow('LKtrack', self.image)
    cv2.waitKey()
