说明：  以当前最新版本的OpenCV最常用最核心的组件模块为索引，深入浅出地介绍了OpenCV2和OpenCV3中的强大功能、性能，以及新特性
(Taking the latest and latest OpenCV's most commonly used core modules as index, we introduce the powerful functions, performance and new features of OpenCV2 and OpenCV3.)