getimg.py

#!/usr/bin/env python2

import sys
import os
import Image

image = sys.argv[1]
todir = sys.argv[2].rstrip(os.sep)
width = int(sys.argv[3])
height = int(sys.argv[4])

if len(sys.argv) > 5:
    vert = sys.argv[5].lower() in ("v", "vertical", "vert")
else:
    vert = False

if vert:
    def sizeIter(xcount, ycount):
        for x in range(xcount):
            for y in range(ycount):
                yield (x, y)

else:
    def sizeIter(xcount, ycount):
        for y in range(ycount):
            for x in range(xcount):
                yield (x, y)

if not os.path.isdir(todir):
    os.mkdir(todir)

else:
    for file in os.listdir(todir):
        i = todir + os.sep + file
        if os.path.isfile(i): os.remove(i)

imageBase = Image.open(image)
imageX, imageY = imageBase.size

xcount = imageX // width
ycount = imageY // height
i = 0

for x, y in sizeIter(xcount, ycount):
    out = "{}{}image{:0>{}}.png".format(todir, os.sep, i, len(str(xcount * ycount)))
    box = [x * width, y * height, (x+1) * width, (y+1) * height]
    new = imageBase.crop(box)
    new.save(out)
    print("saved {}".format(out))

    i += 1