3.通道分离 b,g,r = cv2.split(img) 1. 4.通道合并 img = cv2.merge((b,g,r)) 1. split太消耗性能,所以还有另外的方式,通过numpy去获取通道 b = img[:,:,0] #or make all the red pixels to zero, img[:,:,2] = 0 cv2.imwrite('../res/meinv_2.png', img) 1. 2. 3. 4. 5....