from PIL import Image

#exemple input = "carre_base_encode.png"
input = "tentacle_image_encode_4.png"

imagette1_noir = [
    [
        [0,255,0,0],
        [0,255,255,255],
        [255,255,255,0],
        [0,0,255,0],
    ],
    [
        [0,255,255,255],
        [255,255,255,0],
        [0,0,255,0],
        [0,255,0,0],
    ],
    [
        [255,255,255,0],
        [0,0,255,0],
        [0,255,0,0],
        [0,255,255,255],
    ],
    [
        [0,0,255,0],
        [0,255,0,0],
        [0,255,255,255],
        [255,255,255,0],
    ],
    [
        [255,0,0,0],
        [255,255,255,0],
        [255,255,0,255],
        [0,255,0,0],
    ],
    [
        [0,0,0,255],
        [255,255,0,255],
        [255,0,255,255],
        [255,0,0,0],
    ],
    [
        [0,0,255,0],
        [255,0,255,255],
        [0,255,255,255],
        [0,0,0,255],
    ],
]
imagette2_noir = [
    [
        [0,0,255,0],
        [255,255,255,0],
        [0,255,255,255],
        [0,255,0,0],
    ],
    [
        [255,255,255,0],
        [0,255,255,255],
        [0,255,0,0],
        [0,0,255,0],
    ],
    [
        [0,255,255,255],
        [0,255,0,0],
        [0,0,255,0],
        [255,255,255,0],
    ],
    [
        [0,255,0,0],
        [0,0,255,0],
        [255,255,255,0],
        [0,255,255,255],
    ],
    [
        [0,255,0,0],
        [255,255,0,255],
        [255,255,255,0],
        [255,0,0,0],
    ],
    [
        [255,0,0,0],
        [255,0,255,255],
        [255,255,0,255],
        [0,0,0,255],
    ],
    [
        [0,0,0,255],
        [0,255,255,255],
        [255,0,255,255],
        [0,0,255,255],
    ],
]

noir = imagette1_noir + imagette2_noir

input_image = Image.open(input)
width, height = input_image.size

output_image = Image.new(input_image.mode, (int(width)//4, int(height)//4))

for x in range(0, width, 4):
    for y in range(0, height, 4):
        if x == 4 and y == 4:
            z=1
        imagette = [
            [input_image.getpixel((x, y)), input_image.getpixel((x+1, y)), input_image.getpixel((x+2, y)), input_image.getpixel((x+3, y))],
            [input_image.getpixel((x, y+1)), input_image.getpixel((x+1, y+1)), input_image.getpixel((x+2, y+1)), input_image.getpixel((x+3, y+1))],
            [input_image.getpixel((x, y+2)), input_image.getpixel((x+1, y+2)), input_image.getpixel((x+2, y+2)), input_image.getpixel((x+3, y+2))],
            [input_image.getpixel((x, y+3)), input_image.getpixel((x+1, y+3)), input_image.getpixel((x+2, y+3)), input_image.getpixel((x+3, y+3))],
        ]

        if imagette in noir:
            output_image.putpixel((x//4, y//4), 0)
            # print("NOIR", imagette)
        else:
            output_image.putpixel((x//4, y//4), 1)
            # print("BLANC", imagette)

output_image.show()

"Tux", "Gnu", "Beastie", "Adiumy"