Mercurial > hg > cropresize
view cropresize/__init__.py @ 4:6ec33e2ce60f
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author | k0s <k0scist@gmail.com> |
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date | Sat, 06 Mar 2010 13:22:31 -0500 |
parents | 0a54e5bd2875 |
children | c89738f3f417 |
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#!/usr/bin/env python import sys from PIL import Image def crop_resize(image, size, exact_size=False): """ Crop out the proportional middle of the image and set to the desired size. * image: a PIL image object * size: a 2-tuple of (width,height); at least one must be specified * exact_size: whether to scale up for smaller images If the image is bigger than the sizes passed, this works as expected. If the image is smaller than the sizes passed, then behavior is dictated by the ``exact_size`` flag. If the ``exact_size`` flag is false, the image will be returned unmodified. If the ``exact_size`` flag is true, the image will be scaled up to the required size. """ assert size[0] or size[1] size = list(size) image_ar = image.size[0]/float(image.size[1]) crop = size[0] and size[1] if not size[1]: size[1] = int(image.size[1]*size[0]/float(image.size[0]) ) if not size[0]: size[0] = int(image.size[0]*size[1]/float(image.size[1]) ) size_ar = size[0]/float(size[1]) if size[0] > image.size[0]: if size[1] > image.size[1]: if not exact_size: return image else: pass # raise NotImplementedError elif size[1] > image.size[1]: pass if crop: if image_ar > size_ar: # trim the width xoffset = int(0.5*(image.size[0] - size_ar*image.size[1])) image = image.crop((xoffset, 0, image.size[0]-xoffset, image.size[1])) elif image_ar < size_ar: # trim the height yoffset = int(0.5*(image.size[1] - image.size[0]/size_ar)) image = image.crop((0, yoffset, image.size[0], image.size[1] - yoffset)) return image.resize(size, Image.ANTIALIAS) def main(): from optparse import OptionParser parser = OptionParser('%prog [options] image1.png [image2.jpg] [...]') parser.add_option('-W', '--width') parser.add_option('-H', '--height') parser.add_option('-e', '--exact-size', dest='exact', action='store_true', default=False) (options, args) = parser.parse_args() if not args: parser.print_help() sys.exit() width = int(options.width) height = int(options.height) for arg in args: image = Image.open(arg) new_image = crop_resize(image, (width, height), options.exact) new_image.show() if __name__ == '__main__': main()