python用PIL库实现彩色图片转化为黑白图片

#!/user/bin/env python
# -*- coding:utf-8 -*-
from PIL import Image
img = Image.open("机场.jpg")   # 读取图片
img = img.convert("L")   # 转化为黑白图片
img.save("444.jpg")   # 存储图片

https://blog.csdn.net/weixin_44517301/article/details/100833899
https://www.itranslater.com/qa/details/2582654500368548864