python - python add_argument 参数定义

Question

我有一个示例 OCR 程序来从名片中提取数字。我不确定我是否理解“-i”、“-d”、“--image”、“--digits”的用法。还有什么是第 22 行和第 27 行中的“选项”。在此先感谢这里是代码：

# USAGE
# python ocr_digits.py --image apple_support.png
# python ocr_digits.py --image apple_support.png --digits 0

# import the necessary packages
import pytesseract
import argparse
import cv2

# construct the argument parser and parse the arguments
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--image", required=True,
                help="path to input image to be OCR'd")
ap.add_argument("-d", "--digits", type=int, default=1,
                help="whether or not *digits only* OCR will be performed")
args = vars(ap.parse_args())

# load the input image, convert it from BGR to RGB channel ordering,
# and initialize our Tesseract OCR options as an empty string
image = cv2.imread(args["image"])
rgb = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
options = ""

# check to see if *digit only* OCR should be performed, and if so,
# update our Tesseract OCR options
if args["digits"] > 0:
    options = "outputbase digits"

# OCR the input image using Tesseract
text = pytesseract.image_to_string(rgb, config=options)
print(text)

标签： pythonocrpython-tesseract