1、安装依赖工具
yum install autoconf automake libtool libjpeg-devel libpng-devel libtiff-devel zlib-devel
2、编译安装leptonica
wget http://www.leptonica.org/source/leptonica-1.74.4.tar.gz
tar zxvf leptonica-1.74..tar.gz leptonica-1.74.
cd leptonica-1.74./
./configure --prefix=/usr/local/leptonica
make
make install
3、配置环境变量
vi /etc/profile 添加：
PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/leptonica/lib/pkgconfig
export PKG_CONFIG_PATH
CPLUS_INCLUDE_PATH=$CPLUS_INCLUDE_PATH:/usr/local/leptonica/include/leptonica
export CPLUS_INCLUDE_PATH
C_INCLUDE_PATH=$C_INCLUDE_PATH:/usr/local/leptonica/include/leptonica
export C_INCLUDE_PATH
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/leptonica/lib
export LD_LIBRARY_PATH
LIBRARY_PATH=$LIBRARY_PATH:/usr/local/leptonica/lib
export LIBRARY_PATH
LIBLEPT_HEADERSDIR=/usr/local/leptonica/include/leptonica
export LIBLEPT_HEADERSDIR source /etc/profile
4、编译安装tesseract
git clone https://github.com/tesseract-ocr/tesseract.git
cd tesseract
./autogen.sh
./configure --prefix=/usr/local/tesseract --with-extra-libraries=/usr/local/leptonica/lib
make
make install
make training
make training-install
5、配置环境变量
vi /etc/profile 添加：
PATH=$PATH:/usr/local/tesseract/bin
export PATH source /etc/profile
6、测试安装是否成功
tesseract -v 显示：
tesseract 4.00.00alpha
leptonica-1.74.
libgif 4.1.(?) : libjpeg 6b (libjpeg-turbo 1.2.) : libpng 1.5. : zlib 1.2. : libwebp 0.3. Found SSE