"""

Handles command line arguments and begins the real-time OCR by calling ocr_stream().

A path to the Tesseract cmd root is required, but all other params are optional.

Example command-line use: python3 Main.py -t /usr/local/Cellar/tesseract/4.1.1/bin/tesseract

optional arguments:

-h, --help show this help message and exit

-c , --crop crop OCR area in pixels (two vals required): width height

-v , --view_mode view mode for OCR boxes display (default=1)

-sv, --show_views show the available view modes and descriptions

-l , --language code for tesseract language, use to add multiple (ex: chi_sim chi_tra)

-sl, --show_langs show list of tesseract (4.0 ) supported langs

required named arguments:

-t , --tess_path path to the cmd root of tesseract install (see docs for further help)

"""

parser = argparse.ArgumentParser()

# Required:

requiredNamed = parser.add_argument_group('required named arguments')

requiredNamed.add_argument('-t', '--tess_path',

help="path to the cmd root of tesseract install (see docs for further help)",

metavar='', required=True)

# Optional:

parser.add_argument('-c', '--crop', help="crop OCR area in pixels (two vals required): width height",

nargs=2, type=int, metavar='')

parser.add_argument('-v', '--view_mode', help="view mode for OCR boxes display (default=1)",

default=1, type=int, metavar='')

parser.add_argument('-sv', '--show_views', help="show the available view modes and descriptions",

action="store_true")

parser.add_argument("-l", "--language",

help="code for tesseract language, use to add multiple (ex: chi_sim chi_tra)",

metavar='', default=None)

parser.add_argument("-sl", "--show_langs", help="show list of tesseract (4.0 ) supported langs",

action="store_true")

parser.add_argument("-s", "--src", help="SRC video source for video capture",

default=0, type=int)

args = parser.parse_args()

if args.show_langs:

Linguist.show_codes()

if args.show_views:

print(OCR.views.__doc__)

tess_path = os.path.normpath(args.tess_path)

# This is where OCR is started...

OCR.tesseract_location(tess_path)