img.py

#!/usr/bin/python

from PIL import Image
from sys import argv, stderr
from os import get_terminal_size

if len(argv) != 2:
    print(f'Usage: {argv[0]} <img>', file=stderr)
    exit(1)

img = Image.open(argv[1])
img = img.resize(get_terminal_size(), Image.ANTIALIAS).convert("RGB")

maxx, maxy = img.size
for y in range(maxy):
    for x in range(maxx):
        r, g, b = img.getpixel((x, y))
        print(f'\033[48;2;{r};{g};{b}m ', end='')
    print()

print('\033[0m')