प्रोग्राम की सुविधाएँ · क्रमबद्ध ग्रेस्केल डिथरिंग

def ordered_dither(pixels):
    pixels = [tuple(row) for row in pixels]
    width = len(pixels[0]) if pixels else 0
    if len(pixels) > 64 or width > 64 or any(len(row) != width for row in pixels):
        raise ValueError("image.shape")
    if any(type(v) is not int or not 0 <= v <= 255 for row in pixels for v in row):
        raise ValueError("pixel.byte")
    thresholds = ((32, 160), (224, 96))
    return [[value >= thresholds[r % 2][c % 2] for c, value in enumerate(row)]
            for r, row in enumerate(pixels)]