python - RGB matrix of an image

Question

Taking an image as input, how can I get the rgb matrix corresponding to it? I checked out the numpy.asarray function. Does that give me the rgb matrix or some other matrix?

Answer 1

I have a feeling I'm not doing exactly what you wanted here, so please specify if this is totally off. You could open the image like this and get an array of pixels:

import Image
im = Image.open('Lenna.png')
pixels = list(im.getdata())

This will get you a flat list of RGB data that looks like

[(226, 137, 125), (226, 137, 125), (223, 137, 133), (223, 136, 128), 
 (226, 138, 120), (226, 129, 116), (228, 138, 123), (227, 134, 124), 
 (227, 140, 127), (225, 136, 119), (228, 135, 126), (225, 134, 121),...

Now this will be all pixels in a flat array, if you want a two dimensional array then some additional code would be needed for that. Not sure if there is a direct function for it in PIL.