pytesseract 識別驗證碼

 使用 tesseract 技術，練習驗證碼識別技術

#!/usr/bin/env python
# -*- coding:utf-8 -*-


import pytesseract

import urllib
import urllib.request

from PIL import  Image


url = 'https://so.gushiwen.org/RandCode.ashx'

urllib.request.urlretrieve(url=url,filename='./captcha.jpg')

image = Image.open('./captcha.jpg')

image.show()

# # 識別之前修改這張圖片TODO
def deal_captcha(image):
    # 黑白的圖片
    image = image.convert('L')

    # 圖片中的數據二維數組[[209,156,……],[],[]]
    data = image.load()

    w,h= image.size
    # 顏色範圍0~255
    # 255純白
    # 0純黑
    for i in range(w):
        for j in range(h):
            if data[i,j] > 100:
                data[i,j] = 255
            else:
                data[i,j] = 0
    return image

image = deal_captcha(image)
str = pytesseract.image_to_string(image)

print(str)