font-big-digits.py

import sys

from PIL import Image
import PIL.ImageOps

def pil_8b1b(in_bytes):
    if len(in_bytes)!=8:
        return None
    b = (0b00000001 * bool(in_bytes[7])) + \
        (0b00000010 * bool(in_bytes[6])) + \
        (0b00000100 * bool(in_bytes[5])) + \
        (0b00001000 * bool(in_bytes[4])) + \
        (0b00010000 * bool(in_bytes[3])) + \
        (0b00100000 * bool(in_bytes[2])) + \
        (0b01000000 * bool(in_bytes[1])) + \
        (0b10000000 * bool(in_bytes[0]))
    return bytes([b,])

im = Image.open(sys.argv[1])
if im.size!=(143,16):
    print('Image size different than 143x16px. Exiting')
    exit(1)

# do some transformations on image
im = im.convert('L')
im = im.rotate(-90, expand=True)
im = PIL.ImageOps.invert(im)
im = list(im.getdata())

# change PIL format to raw bytes format
raw = b''
for i in range(len(im)//8):
    offset=i*8
    raw += pil_8b1b(im[offset:offset+8])

# deinterlace bytes
raw_deint=b''
for i in range(0,11): # 11 characters of 13px width
    for j in range(0,13):
        raw_deint += bytes( [ raw[(i*26)+j*2+1],] )
    for j in range(0,13):
        raw_deint += bytes( [ raw[(i*26)+j*2],] )

def chunks(lst, n):
    for i in range(0, len(lst), n):
        yield lst[i:i + n]

for chunk in chunks(raw_deint, 26):
    big_digits = ''.join([f'0x{i:02X}, ' for i in chunk])
    print("{"+big_digits+"},")