hv_jp2_decode

#!/usr/bin/env python

import re
import argparse

from hvJP2K.jp2.jp2_decode import jp2_decode

parser = argparse.ArgumentParser(description='Decode JP2 files.')
parser.add_argument('-i', metavar='jp2file', help='input JP2 filename', required=True)
parser.add_argument('-o', metavar='file', help='output filename', required=True)
parser.add_argument('-region', metavar='{<top>,<left>},{<height>,<width>}', help='region of interest')
parser.add_argument('-reduce', metavar='<discard levels>', help='resolution levels to be discarded', type=int, nargs='?', default=0)
parser.add_argument('-codestream_components', help='suppress multi-component/colour xforms', action='store_true')
parser.add_argument('-xml', help='print to terminal the XML metadata', action='store_true')
parser.add_argument('-v', '--verbose', help='verbose operation', action='store_true')
args = parser.parse_args()

area = None
if args.region is not None:
    area = [float(n) for n in re.split('\{|,|\}', args.region) if n != '']
    if len(area) != 4:
        area = None
    else:
        # to (top left, bottom right)
        area[2] += area[0]
        area[3] += area[1]

jp2_decode(args.i, args.o, xml=args.xml, rlevel=args.reduce, area=area,
           ignore_pclr_cmap_cdef=args.codestream_components, verbose=args.verbose)