写一个简单的函数来展示一张图片和它对应的标注点作为例子。

def show_landmarks(image, landmarks):
    """显示带有地标的图片"""
    plt.imshow(image)
    plt.scatter(landmarks[:, 0], landmarks[:, 1], s=10, marker='.', c='r')
    plt.pause(0.001)  # pause a bit so that plots are updated

plt.figure()
show_landmarks(io.imread(os.path.join('data/faces/', img_name)),
               landmarks)
plt.show()