python图片简易二值化

• 导入相关库

import numpy as np
from PIL import Image
import skimage.io

• 转化为灰度图

img = Image.open(file_name)
img = img.convert("L")

• 图片均值

imgs = skimage.io.imread(file_name)
ttt = np.mean(imgs)

• 二值化

WHITE, BLACK = 255, 0

img = img.point(lambda x: WHITE if x > ttt else BLACK)
img = img.convert('1')
img.save(new_file_name)