This script converts an image to arduino functions using u8glib.

draw_bitmap.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

from PIL import Image
import sys

funccall_tmp = "u8g.drawBitmapP({0}, {1}, 1, 8, {2});"

def draw(px, width, height):
    funcs = list()
    for y in range(int(height/8) if height % 8 == 0 else int(height/8+1)):
        for x in range(int(width/8) if width % 8 == 0 else int(width/8+1)):
            func = "bitmap_{0}x{1}".format(str(x*8), str(y*8))
            funccall = funccall_tmp.format(str(x*8), str(y*8), func)
            funcs.append(funccall)
            print("const uint8_t "+func+"[] PROGMEM = {")
            for j in range(8):
                s = str()
                for i in range(8):
                    try:
                        if px[x*8+i, y*8+j] == 0:
                            s += '1'
                        else:
                            s += '0'
                    except IndexError:
                        s += '0'
                print("\t"+hex(int(s, 2))+",")
            print("};");

    print("void draw(void) {")

    for f in funcs:
        print("\t"+f)

    print("}")


if __name__ == "__main__":
    if len(sys.argv) < 2:
        print("Usage: "+sys.argv[0]+" FileName")
        sys.exit()

    target_size = (128, 64)

    try:
        with Image.open(sys.argv[1]) as im:
            resizedIm = im.resize(target_size)
            convertedIm = resizedIm.convert('1')
            convertedIm.show()
            draw(convertedIm.load(), target_size[0], target_size[1])

    except IOError:
        pass