Split RGB Channels

Problem

Split an RGB image into its three color channels.

The input is a 2D list of [r, g, b] pixels. Return a list of three 2D lists [red, green, blue], each holding the corresponding channel values. An empty image returns [[], [], []].

Hint

Build three grids by picking index 0, 1 and 2 from every pixel.

Test cases

case 1

in: [[[[1,2,3],[4,5,6]]]]

expected: [[[1,4]],[[2,5]],[[3,6]]]

case 2

in: [[[[10,20,30]]]]

expected: [[[10]],[[20]],[[30]]]

case 3

in: [[]]

expected: [[],[],[]]

Starter codePython

def split_channels(image):
    # Your code here
    pass

3 test cases · run your code against them in the editor