parser.add_argument('--charset','-c',type=str,default='charset_36_EN.txt',help='Path to the charset file corresponding to the selected model.')
parser.add_argument('--save','-s',type=str,default=False,help='Set true to save results. This flag is invalid when using camera.')
parser.add_argument('--vis','-v',type=str2bool,default=True,help='Set true to open a window for result visualization. This flag is invalid when using camera.')