def calc_center(eye):
    """
    Using for further cropping eyes from images with faces
    :param eye:
    :return: x, y, of center of eye
    """
    center_x = (eye[0][0] + eye[3][0]) // 2
    center_y = (eye[0][1] + eye[3][1]) // 2
    return int(center_x), int(center_y)