import numpy as np, cv2

bgr_img = cv2.imread("img/color_model.jpg", cv2.IMREAD_COLOR) # 컬러 영상 읽기

white = np.array([255, 255, 255], np.uint8)
cmy_img = white - bgr_img
cyan, magenta, yellow = cv2.split(cmy_img) # 채널 분리

titles = ['bgr_img','cmy_img','cyan','magenta','yellow']
[cv2.imshow(t, eval(t)) for t in titles]

cv2.waitKey(0)