通過Image庫打開的圖像，直接進行矩陣操作時會報錯“TypeError: 'Image' object does not support item assignment”。這里，需要先將圖像轉換成numpy格式。

示例如下：

import numpy as np
from PIL import Image

img = Image.open('1.jpg')
img = np.asarray(img)  # to numpy

# operation
img[:, 1:10, 1:10] = 0

img = Image.fromarray(img)  # to Image