使用掩膜绘制图像直方图opencv的python实现

import cv2import numpy as npimport matplotlib.pyplot as pltimage = 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.calc...

是猪哥不是诸葛

618人浏览 · 2020-01-19 08:43:50

是猪哥不是诸葛 · 2020-01-19 08:43:50 发布

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()