import cv2
import numpy as np
import matplotlib.pyplot as plt
image = cv2.imread("../data/2.jpg", 0)
mask = np.zeros(image.shape, np.uint8)
mask[200:400, 200:400] = 255 # 制作掩膜
histImage = cv2.calcHist([image], [0], None, [256], [0, 255])
mask_histImage = cv2.calcHist([image], [0], mask, [256], [0, 255])
plt.plot(histImage)
plt.plot(mask_histImage)
plt.show()
使用掩膜绘制图像直方图opencv的python实现
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转载自blog.csdn.net/my_name_is_learn/article/details/104036243
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