import cv2 as cv

# read image
img = cv.imread("opencv_logo.png",cv.IMREAD_UNCHANGED)

# get height and width, channel of img
height,width,channel=img.shape

# show infos
print("height=\t",height)
print("width=\t",width)
print("channel=\t",height)

# split channels
blue,green,red=cv.split(img)

# show channels
## red channel
#cv.imshow("channel", red)
## green channel
cv.imshow("channel", green)
## blue channel
#cv.imshow("channel", blue)
cv.waitKey(0)
cv.destroyWindow("channel")