Split image

splitRGBImage.py

import numpy as np
import cv2

def splitRGBImage(filename):
        img = cv2.imread(filename)
        red = np.copy(img)
        red[:,:,0].fill(0)
        red[:,:,1].fill(0)
        red = cv2.resize(red, (224, 224,))
        cv2.imwrite("red_"+filename, red)
        green = np.copy(img)
        green[:,:,0].fill(0)
        green[:,:,2].fill(0)
        green = cv2.resize(green, (224, 224,))
        cv2.imwrite("green_"+filename, green)
        blue = np.copy(img)
        blue[:,:,1].fill(0)
        blue[:,:,2].fill(0)
        blue = cv2.resize(blue, (224, 224,))
        cv2.imwrite("blue_"+filename, blue)

may want to change the filename RGB prefixes to suffixes to support easy writing into other directory paths i.e. cv2.imwrite(filename+"_green") will allow a filename with path to save the file "/media/pic.jpg_blue"