yum search tesseract

 yum install tesseract.x86_64 -y

 pip3 install pytesseract

 pip3 install Pillow

 yum install -y libpng12-devel.x86_64 - libtiff-devel.x86_64  zlib-devel.x86_64 

[root@localhostreuest]#tesseract  1.png  out

Tesseract Open Source OCR Engine v3.04.00 with Leptonica

[root@localhostreuest]#cat out.txt

2765

#下载包

wget https://github.com/tesseract-ocr/tesseract/archive/4.0.0.tar.gz

wget http://www.leptonica.org/source/leptonica-1.77.0.tar.gz

#解压安装leptoinica

tar xf leptonica-1.77.0.tar.gz

cd leptonica-1.77.0

 ./configure

 make && make install

 yum install automake libtool -y

 #安装tesseract

 cd tesseract-4.0.0/

./autogen.sh

./configure

./configure --with-extra-includes=/usr/local/include --with-extra-libraries=/usr/local/include

#pip3安装 Pillow pytesseract