crop and resize images, powered by PIL

script.py

# -*- encoding: utf-8 -*-
import logging
import os.path
import sys

from PIL import Image

logging.basicConfig(level=logging.INFO)
L = logging.getLogger(__name__)
L.setLevel(logging.INFO)


def resize_image(image, scale=(0.5, 0.5)):
    new_size = tuple(x * scale[idx] for idx, x in enumerate(image.size))
    L.info(
        'resize %s %spx x %spx to %spx x %spx',
        image, image.size[0], image.size[1],
        new_size[0], new_size[1]
    )
    image.thumbnail(new_size)
    

def crop_image(image, scale=(0.5, 0.5), origin=(0.0, 0.0)):
    box = (origin[0], origin[1], scale[0] * image.size[0] + origin[0], scale[1] * image.size[1] + origin[1])
    L.info(
        'crop %s %spx x %spx to %s',
        image, image.size[0], image.size[1],
        box
    )
    return image.crop(box)


def main():
    for src in sys.argv[1:]:
        with Image.open(src) as image:
            dest = '%s_changed%s' % os.path.splitext(src)
            image = crop_image(image, scale=(0.82, 0.45))
            resize_image(image, scale=(0.8, 0.8))
            image.save(dest)


if __name__ == '__main__':
    main()