Linux环境下tesseract配置和使用

1. 安装依赖包

• 安装PIL

  pip install pillow

  pip3 install pillow

• 安装tesseract

  pip install tesseract

  pip3 install tesseract

• 安装pytesseract

  pip install pytesseract

  pip3 install pytesseract

2. 添加环境变量

   vim ~/.bash_profile

   添加如下环境变量，TESSDATA_PREFIX的值根据tesseract的安装路径做调整

   export TESSDATA_PREFIX="/usr/local/Cellar/tesseract/3.05.02/share/tessdata" 
   export PATH=$PATH:$TESSDATA_PREFIX
   

   使环境变量生效

   source ~/.bash_profile

3. 添加语言包

• 检查当前语言包

  tesseract --list-langs

• 下载所需语言包

  如‘chi_sim.traineddata’

  Tesseract 4.0.0
  https://github.com/tesseract-ocr/tessdata

  Tesseract 3.04 or 3.05
  https://github.com/tesseract-ocr/tessdata/tree/3.04.00

• 将语言包拷贝到对应目录下

  如 /usr/local/Cellar/tesseract/3.05.02/share/tessdata

4. 应用举例

   from PIL import Image
   import pytesseract
   image = Image.open('1.jpg')
   text = pytesseract.image_to_string(image, lang='chi_sim')