Skimage:如何在阈值图像的顶部、底部和侧面添加更多的黑色？

from skimage import io
import numpy as np

image = io.imread('image.jpg')

gray_image = np.mean(image, axis=2).astype(np.uint8)

threshold = 128
binary_image = gray_image > threshold

new_image = np.zeros_like(image)
height, width = image.shape[:2]
new_image[(height - binary_image.shape[0]) // 2 : (height + binary_image.shape[0]) // 2,
          (width - binary_image.shape[1]) // 2 : (width + binary_image.shape[1]) // 2] = binary_image

border_size = 10
new_image[:border_size, :] = 0  # 顶部
new_image[-border_size:, :] = 0  # 底部
new_image[:, :border_size] = 0  # 左侧
new_image[:, -border_size:] = 0  # 右侧

io.imsave('processed_image.jpg', new_image)