number_recognition.py 文件源码

def draw_image_with_keypoints(img: np.ndarray, keypoints, window_title: str ="Image with keypoints") -> None:
    """An apparently unused method which is actually quite useful when debugging!"""

    # cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS ensures the size of the circle corresponds to the size of blob
    img_with_keypoints = cv2.drawKeypoints(img, keypoints, outImage=np.array([]), color=(0, 0, 255),
                                           flags=cv2.DRAW_MATCHES_FLAGS_DRAW_RICH_KEYPOINTS)
    draw_image(img_with_keypoints, window_title)