Python验证码识别 安装Pillow、tesseract-ocr与pytesseract模块的安装以及错误解决

1.安装Pillow

pip install Pillow

2.安装tesseract-ocr

github地址: https://github.com/tesseract-ocr/tesseract

You can either Install Tesseract via pre-built binary package or build it from source.

windows:

The latest installer can be downloaded here: tesseract-ocr-setup-3.05.01.exe and tesseract-ocr-setup-4.00.00dev.exe (experimental). 

ubuntu:

sudo apt-get install tesseract-ocr

traineddata文件路径: /usr/share/tesseract-ocr/tessdata/

3.安装pytesseract

pip install pytesseract

遇到的问题:

1.FileNotFoundError: [WinError 2] 系统找不到指定的文件

解决方法:

方法1[推荐]: 将tesseract.exe添加到环境变量PATH中，

例如: D:Tesseract-OCR,默认路径为C:Program Files (x86)Tesseract-OCR

注意: 为了使环境变量生效，需要关闭cmd窗口或是关闭pycharm等ide重新启动

方法2: 修改pytesseract.py文件，指定tesseract.exe安装路径

            #
             CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
tesseract_cmd = ‘C:\Program Files (x86)\Tesseract-OCR\tesseract.exe‘

方法3:  在实际运行代码中指定

pytesseract.pytesseract.tesseract_cmd = ‘D:\Tesseract-OCR\tesseract.exe‘

2.pytesseract.pytesseract.TesseractError: (1, ‘Error opening data file \Tesseract-OCR\tessdata/eng.traineddata‘)

 解决方法:

方法1[推荐]: 

将tessdata目录的上级目录所在路径(默认为tesseract-ocr安装目录)添加至TESSDATA_PREFIX环境变量中

例如: C:Program Files (x86)Tesseract-OCR

Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.

方法2:  在.py文件配置中指定tessdata-dir

tessdata_dir_config = ‘--tessdata-dir "D:\Tesseract-OCR\tessdata"‘# tessdata_dir_config = ‘--tessdata-dir "‘C:\Program Files (x86)\Tesseract-OCR\tessdata"‘
pytesseract.image_to_string(image, config=tessdata_dir_config)

附: trainedata下载地址: the latest from github.com

参考文档:

https://pypi.python.org/pypi/pytesseract

https://github.com/tesseract-ocr/tesseract/wiki

原文：http://www.cnblogs.com/hupeng1234/p/7136442.html