图像每个像素点的值以及三个通道值的运算。

from matplotlib import pyplot as pyl
import cv2
import numpy

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

img_BGR = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
img_gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

cv2.imshow("IMage",img)
cv2.waitKey(0)         
cv2.destroyAllWindows()

cv2.imwrite("mytime2.jpg",img)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

cv2.imshow("IMage",img)
cv2.waitKey(0)         
cv2.destroyAllWindows()

cv2.imwrite("mytime2.jpg",img)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
cv2.imshow("IMage",img[:100,:200])

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

b,g,r = cv2.split(img)

img = cv2.merge(b,g,r)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
img_2 = numpy.copy(img)


print(img[:3,:3,0]+img_2[:3,:3,0] )

print(cv2.add(img[:3,:3,0],img_2[:3,:3,0]))

img_cat = cv2.imread("C:/Users/xpp/Desktop/time.png")
img_dog = cv2.imread("C:/Users/xpp/Desktop/time1.png")

ret = cv2.addWeighted(img_cat,0.2,img_dog,0.8,0)  
cv2.imshow("IMage",ret)
cv2.waitKey(0)         
cv2.destroyAllWindows()

from matplotlib import pyplot as pyl
import cv2
import numpy

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

img_BGR = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
img_gray = cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

cv2.imshow("IMage",img)
cv2.waitKey(0)         
cv2.destroyAllWindows()

cv2.imwrite("mytime2.jpg",img)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

cv2.imshow("IMage",img)
cv2.waitKey(0)         
cv2.destroyAllWindows()

cv2.imwrite("mytime2.jpg",img)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
cv2.imshow("IMage",img[:100,:200])

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")

b,g,r = cv2.split(img)

img = cv2.merge(b,g,r)

img = cv2.imread("C:/Users/xpp/Desktop/time2.jpg")
img_2 = numpy.copy(img)


print(img[:3,:3,0]+img_2[:3,:3,0] )

print(cv2.add(img[:3,:3,0],img_2[:3,:3,0]))

img_cat = cv2.imread("C:/Users/xpp/Desktop/time.png")
img_dog = cv2.imread("C:/Users/xpp/Desktop/time1.png")

ret = cv2.addWeighted(img_cat,0.2,img_dog,0.8,0)  
cv2.imshow("IMage",ret)
cv2.waitKey(0)         
cv2.destroyAllWindows()