PILで画像を切り取り

crop.py

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

import os,re,sys
import tempfile  
import shutil
from PIL import Image

in_dir = "org_imgs"
out_dir = "crop_imgs"
image_size = 320
count = 0
for (root, dirs, files) in os.walk(in_dir):
  for f in files:
    d, ext = os.path.splitext(f)
    if ext == '':
    	continue
    in_file = os.path.join(in_dir, f)
    if not os.path.exists(out_dir):
      os.mkdir(out_dir)
    out_file = os.path.join(out_dir, d+'.png')
    print out_file
    im = Image.open(in_file)
    w, h = im.size
    x = (w-image_size)/2
    y = (h-image_size)/2
    box = (x, y, x+image_size, y+image_size)
    im2 = im.crop(box)
    im2.save(out_file)