Creates files for interleaving from a series of even- or odd-page scan images

interleave.py

#!/usr/bin/env python

import shutil
import argparse


def interleave_pages(startindex, stopindex, startpage, srcpath, dstpath):
    """Remap a series of pages to interleaved destinations.
    """
    if startindex < stopindex:
        increment = 1
    else:
        increment = -1

    page = startpage

    for index in xrange(startindex, stopindex+increment, increment):
        srcfile = "%03d.jpg" % (index)
        dstfile = "%03d_from_%03d.jpg" % (page, index)
        print "Creating %s" % (dstfile)
        shutil.copy(srcpath + '/' + srcfile, dstpath + '/' + dstfile)
        page += 2


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('srcpath',
                        help="Path to the input images")
    parser.add_argument('dstpath',
                        help="Path to the output images")
    parser.add_argument('startindex',
                        type=int,
                        help="index of the starting page image")
    parser.add_argument('stopindex',
                        type=int,
                        help="index of the ending page image")
    parser.add_argument('startpage',
                        type=int,
                        help="output index of the page "
                             "corresponding to startindex")
    args = parser.parse_args()
    interleave_pages(args.startindex,
                     args.stopindex,
                     args.startpage,
                     args.srcpath,
                     args.dstpath)


if __name__ == '__main__':
    main()