Use ImageMagicK's convert.exe to batch convert image files

img_batch_convert.py

#!/usr/bin/env python
# encoding: utf-8 
#
import os
import os.path
import sys
import time

def do_convert(from_path, to_dir, to_filename):
    to_path = os.path.join(to_dir, to_filename)
    print 'do_convert: from_path=%s to_path=%s' % (from_path, to_path)
    os.system('.\\convert.exe %s -resize 25%% %s' % (from_path, to_path))

def is_image_file( path ):
    return path.lower().endswith('.jpg') or path.lower().endswith('.png')

#当前不支持嵌套子目录
def do_batch_convert(basepath, from_reldir, to_reldir):
    print 'do_batch_convert: batch convert image files from dir <%s> to <%s>' % (from_reldir, to_reldir)
    from_dir = os.path.join(basepath, from_reldir)
    to_dir = os.path.join(basepath, to_reldir)
    paths = os.listdir( from_dir )
    for path in paths:
        from_path = os.path.join(from_dir, path)
        if is_image_file( from_path ):
            #Save to target to_dir
            if not os.path.exists(to_dir):
                os.mkdir(to_dir)
            to_filename = path
            do_convert(from_path, to_dir, to_filename)


def Main():
    run_basepath = os.getcwd().replace('\\','/').lower()
    if len(sys.argv)!=3:
        print 'Usage: python batch_convert.py <input_dir> <output_dir>'
        sys.exit(0)
    else:
        do_batch_convert(run_basepath, sys.argv[1], sys.argv[2])

if __name__ == '__main__':
    sys.exit(Main())