画像をスライドさせ分割

gistfile1.py

#! /usr/bin/env python
# -*- coding: utf-8 -*-
import os
import sys
import argparse
import numpy as np
import matplotlib as plt

from PIL import (
    Image,
    ImageDraw,
    )

def main(argv=sys.argv[1:]):
    parser = argparse.ArgumentParser()
    parser.add_argument('image')
    parser.add_argument('-s', '--size', default=50, type=int)
    parser.add_argument('-o', '--output', default='var/images')
    args = parser.parse_args(argv)
    im = Image.open(args.image)
    height, width = im.size
    img_size = args.size
    img_size_half = int(img_size / 2)

    basename = os.path.basename(args.image)
    output_dir = os.path.join(args.output, basename)
    os.makedirs(output_dir, exist_ok=True)
    for yy in range(0, height-img_size, img_size_half):
        for xx in range(0, width-img_size, img_size_half):
            box = (yy, xx, yy+img_size, xx+img_size)
            image = im.crop(box)
            output_name = '{}-{}-{}-{}.jpg'.format(box[0], box[1], box[2], box[3])
            output_path = os.path.join(output_dir, output_name)
            image.save(output_path)
    # img = ImageDraw.Draw(im)
    print(args.image)

if __name__ == '__main__':
    main()