图片转透明圆图

image_format.py

#!/usr/bin/env python
#vi: encoding=utf-8

"""
Image Convert
"""

__author__ = "dreampuf<soddyque@gmail.com>"

from glob import iglob

from PIL import Image, ImageDraw, ImageOps

def convert(filepath, prefix):
    for i in iglob(filepath):
        try:
            origin = Image.open(i)
        except IOError:
            continue
        mask = Image.new("L", origin.size, color=0)
        draw_origin = ImageDraw.Draw(mask)
        draw_origin.ellipse((0, 0) + mask.size, fill=255)
        output = ImageOps.fit(origin, mask.size, centering=(.5,.5))
        output.putalpha(mask)
        fname, _, _ = i.rpartition(".")
        output.save("%s%s.png" % (prefix, fname))

if __name__ == "__main__":
    from optparse import OptionParser
    parser = OptionParser("Usage: %s *.png prefix_ \nConvert the Image to customer tranceparence" % __file__)
    parser.add_option("-t","--target",
            dest="target",
            help="repo which need to statistical")
    parser.add_option("-p","--prefix",
            dest="prefix",
            default="converte_",
            help="the prefix of Output file name")

    options, args = parser.parse_args()
    if options.target is None:
        parser.print_usage()
    else:
        convert(options.target, prefix=options.prefix)