基于python的灰度直方图绘制

import numpy as np
import matplotlib.pyplot as plt
from skimage import io
import cv2

if __name__ == '__main__':
    imgPath = 'background.png'
    img = io.imread(imgPath)
    n, bins, patches = plt.hist(img.flatten(), bins=256)
    plt.savefig("his.png")
    plt.show()