说明：  介绍OpenCV Beta 4.0 版本的用户手册中的图像处理、结构分析、运动分析和对象跟踪部分，模式识别、照相机定标与三维重建部分
(Introduction OpenCV Beta 4.0 version of the user manual of image processing, structural analysis, motion analysis and object tracking part, pattern recognition, camera calibration and three-dimensional reconstruction of part of)