#https://github.com/tesseract-ocr/tesseract/tree/4.0.0
https://codeload.github.com/tesseract-ocr/tesseract/zip/master
#https://jaist.dl.sourceforge.net/project/tess4j/tess4j/3.4.8/Tess4J-3.4.8-src.zip
http://www.leptonica.org/source/leptonica-1.74.4.tar.gz

yum install gcc gcc-c++
yum install autoconf automake libtool
yum install libjpeg-devel libpng-devel libtiff-devel zlib-devel

tar -xzvf leptonica-1.74.4.tar.gz

cd leptonica-1.74.4
./configure
make && make install

export LD_LIBRARY_PATH=$LD_LIBRARY_PAYT:/usr/local/lib
export LIBLEPT_HEADERSDIR=/usr/local/include
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig

cd tesseract-3.04.00
./autogen.sh
　　 autoreconf -i
./configure --with-extra-includes=/usr/local/include --with-extra-libraries=/usr/local/include

这时会提示：
Configuration is done.
You can now build and install tesseract by running:

$ make
$ make install

Training tools can be built and installed with:

$ make training
$ sudo make training-install

继续编译，先编译tesseract，在编译安装 training
　　 make　　
sudo make install
　　
　　make training
　　make training-install

sudo ldconfig

用法
tesseract 1.jpg output -l chi_sim
tesseract 1.jpg stdout

https://www.jianshu.com/p/5c8c6b170f6f