\chapter{cv::Mat. Operations with images.}
\renewcommand{\curModule}{cv::Mat. Operations with images.}
\input{user_guide/user_mat}

\chapter{Features2d.}
\renewcommand{\curModule}{Features2d}
\input{user_guide/user_features2d}

\chapter{Highgui.}
\renewcommand{\curModule}{Highgui.}
\input{user_guide/user_highgui}