python - How do I use Gimp / OpenCV Color to separate images into coloured RGB layers? -

i have jpg image, , find way to:

• decompose image red, green , blue intensity layers (8 bit per channel).
• colorise each of these 'grayscale' images appropriate color
• produce 3 output images in appropriate color, of each channel.

for example if have image: dog.jpg

i want produce: dog_blue.jpg dog_red.jpg , dog_green.jpg

i not want grayscale images each channel. want each image represented correct color.

i have managed use decompose function in gimp layers, each 1 grayscale , can't seem add color it.

i using opencv , python bindings other projects suitable code side may useful if not easy gimp

maybe figured 1 out, here's wants "see" separated channels in own color (that - red in red, green in green etc.).

each channel single value image, may interpreted monochromatic image. can "add color" adding 2 fake empty channels (zero_channel below), , cv2.merge multichannel image.

#!/usr/bin/env python  import cv2 import numpy np import os import sys  show = true save = true   def split_channels(filename):     img = cv2.imread(filename)     if len(img.shape) != 3 or img.shape[2] != 3:         sys.stderr.write('{0}: not correct color image'.format(filename))         return     channels = cv2.split(img)     zero_channel = np.zeros_like(channels[0])     red_img = cv2.merge([zero_channel, zero_channel, channels[2]])     green_img = cv2.merge([zero_channel, channels[1], zero_channel])     blue_img = cv2.merge([channels[0], zero_channel, zero_channel])     if show:         cv2.imshow('red channel', red_img)         cv2.imshow('green channel', green_img)         cv2.imshow('blue channel', blue_img)         cv2.waitkey(0)     if save:         name, extension = os.path.splitext(filename)         cv2.imwrite(name+'_red'+extension, red_img)         cv2.imwrite(name+'_green'+extension, green_img)         cv2.imwrite(name+'_blue'+extension, blue_img)   def main():     if len(sys.argv) < 2:         print('usage: {0} <rgb_image>...'.format(sys.argv[0]))     map(split_channels, sys.argv[1:])   if __name__ == '__main__':     main()