Ordered Dithering 2x2 Bayer

Problem

Apply 2x2 ordered dithering with the Bayer matrix [[0, 2], [3, 1]].

A pixel becomes 255 when its value is strictly greater than 255 * (m + 0.5) / 4, where m is the matrix entry at (i mod 2, j mod 2); otherwise the pixel becomes 0.

Test cases

case 1

in: [[[32,96],[160,224]]]

expected: [[255,0],[0,255]]

case 2

in: [[[32,160],[224,96]]]

expected: [[255,255],[255,255]]

case 3

in: [[[0,0],[0,0]]]

expected: [[0,0],[0,0]]

case 4

in: [[[255,255],[255,255]]]

expected: [[255,255],[255,255]]

Starter codePython

def bayer_dither(image):
    # Your code here
    pass

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