OpenCV-Python画直方图和累积直方图

代码如下：

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

import cv2 import numpy as np import matplotlib.pyplot as plt   img = cv2.imread('C:\\Users\\admin\\Desktop\\original_img3\\testimg\\messi.jpg') _, _, colorChannel = img.shape color = ['B', 'G', 'R'] plt.figure() for i in range(colorChannel):     hist_img, _ = np.histogram(img[:, :, i], 256)     plt.plot(range(256), hist_img, label=color[i])     plt.legend(loc='best')     plt.title('histogram')   plt.figure() for i in range(colorChannel):     hist_img, _ = np.histogram(img[:, :, i], 256)     cdf_img = np.cumsum(hist_img)   # accumulative histogram     plt.plot(range(256), cdf_img, label=color[i])     plt.legend(loc='best')     plt.title('accumulative histogram')

效果如下：