content/encode.py

import cv2
from argparse import ArgumentParser

parser = ArgumentParser()

parser.add_argument('input', help='Input image')
parser.add_argument('output', help='Output bin') 

args = parser.parse_args()

file_path = args.output
img = cv2.imread(args.input, cv2.IMREAD_GRAYSCALE)

height, width = img.shape
vals = []

for i in range(height):
    for j in range(width):
        k = img[i, j]
        vals.append(k)

print(f'{len(vals)} bytes')

with open(file_path, "wb") as file:
    file.write(bytes(vals))