python tesseract-ocr 基础验证码识别功能(Windows)

一、环境

  windows 7 x64

  Python 3 +

二、安装

  1、tesseract-ocr安装

  http://digi.bib.uni-mannheim.de/tesseract/

  2、pytesseract安装

  pip install pytesseract

  3、Pillow 安装

  pip install pillow

三、使用  

#! -*- coding:utf-8 -*-

import pytesseract
from PIL import Image
pytesseract.pytesseract.tesseract_cmd = 'c://Program Files (x86)//Tesseract-OCR//tesseract.exe' tessdata_dir_config = '--tessdata-dir "c://Program Files (x86)//Tesseract-OCR//tessdata"' def main():
image = Image.open('code.png')
code = pytesseract.image_to_string(image, lang = 'eng', config=tessdata_dir_config)
print (code) if __name__ == '__main__':
main()

四、心得、遇到的坑

  1、在 Windows 环境下的支持没有那么好,单单导入 import pytesseract 包,会一直报 Not Find 的错误。

    原因:没有找到安装步骤中的 tesseract-ocr 应用程序,需在代码中加入引用:    

    pytesseract.pytesseract.tesseract_cmd = 'c://Program Files (x86)//Tesseract-OCR//tesseract.exe' 

  2、image_to_string 需要重载两个参数,大概的理解,

    lang = 'eng' 会找到 tessdate_dir_config 下配置路径下的 tessdata 文件夹下的 eng.traineddata 文件,

    config= 则是引用路径

  可以根据 tessdata 目录下的 *.traineddata 文件进行配置不同的识别库(不知道是否正确,大概的理解是这样)

  

  错误提示:

Traceback (most recent call last):
File "D:\***\VerifyCodeTest\src\main.py", line 17, in <module>
main()
File "D:\***\VerifyCodeTest\src\main.py", line 11, in main
code = pytesseract.image_to_string(image, lang = 'eng', config=tessdata_dir_config)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 193, in image_to_string
return run_and_get_output(image, 'txt', lang, config, nice)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 140, in run_and_get_output
run_tesseract(**kwargs)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 111, in run_tesseract
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 707, in __init__
restore_signals, start_new_session)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\subprocess.py", line 990, in _execute_child
startupinfo)
FileNotFoundError: [WinError 2] The system cannot find the file specified

 

Traceback (most recent call last):
File "D:\***\VerifyCodeTest\src\main.py", line 17, in <module>
main()
File "D:\***\VerifyCodeTest\src\main.py", line 11, in main
code = pytesseract.image_to_string(image)#, lang = 'eng', config=tessdata_dir_config)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 193, in image_to_string
return run_and_get_output(image, 'txt', lang, config, nice)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 140, in run_and_get_output
run_tesseract(**kwargs)
File "C:\Users\*\AppData\Local\Programs\Python\Python36\lib\site-packages\pytesseract\pytesseract.py", line 116, in run_tesseract
raise TesseractError(status_code, get_errors(error_string))
pytesseract.pytesseract.TesseractError: (1, 'Error opening data file \\Program Files (x86)\\Tesseract-OCR\\eng.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language \'eng\' Tesseract couldn\'t load any languages! Could not initialize tesseract.')

参考自:https://blog.csdn.net/a349458532/article/details/51490291
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