opencv_tutorials/python/code_003/opencv_003.py at master · HZHCoder1990/opencv_tutorials · GitHub

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import cv2 as cv

import numpy as np

src = cv.imread("./test.png")

cv.namedWindow("input", cv.WINDOW_AUTOSIZE)

cv.imshow("input", src)

# 克隆图像

m1 = np.copy(src)

# 赋值

m2 = src

src[100:200,200:300,:] = 255

cv.imshow("m2",m2)

m3 = np.zeros(src.shape, src.dtype)

cv.imshow("m3", m3)

m4 = np.zeros([512,512], np.uint8)

# m4[:,:] =127 try to give gray value 127

cv.imshow("m4", m4)

m5 = np.ones(shape=[512,512,3], dtype=np.uint8)

m5[:,:,0] = 255

cv.imshow("m5", m5)

cv.waitKey(0)

cv.destroyAllWindows()

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