CentOS 6.3 下build tesseract安装Dependencies：安装Leptonica：安装Tesseract：设置Tesseract环境变量：运行Tesseract：equationdetect.cpp编译问题：
参考：https://code.google.com/p/tesseract-ocr/wiki/Compiling安装Dependencies：yes | yum install libpng-devel.x86_64yes | yum install libjpeg-devel.x86_64yes | yum install libtiff-devel.x86_64
