__blog_imgio.py

from pathlib import Path
from PIL import Image, ImageOps

def write_bin():
    base_dir = Path(__file__).parent
    a = 390
    im = ImageOps.grayscale(Image.open(str(base_dir / "buildings_original.jpg"))).resize((a, a))
    data = bytearray([im.getpixel((x, y)) for x in range(a) for y in range(a)])
    with open(str(base_dir / "buildings_original.bin"), 'wb') as f:
        f.write(data)

def write_jpg():
    base_dir = Path(__file__).parent
    a = 390
    for c_out in range(32):
        with open(str(base_dir / ("buildings_filter.%02d.bin" % c_out)), 'rb') as f:
            data = bytearray(f.read())
        print(len(data))
        im = Image.new('L', (a, a), 0)
        [im.putpixel((x, y), data[y*a+x]) for x in range(a) for y in range(a)]
        im.save(str(base_dir / ("buildings_filter.%02d.jpg" % c_out)))

if __name__ == "__main__":
    # write_bin()
    write_jpg()