足球比赛场景的三维再现和自动解说

3D Reconstruction and Video Annotation of Soccer Game

特定领域的视频解说已成为当前多媒体研究的热点问题 ,其中一个主要应用领域是体育运动的解说与分析 .文中介绍一个实用的足球比赛场景的三维重建和视频解说系统 :首先通过足球比赛的视频序列恢复场景的三维模型 ,包括球员的位置、速度等参数 ,以及足球的运动轨迹 ,并根据这些信息和特定的先验知识识别球员的动作行为 ;进而对比赛过程加以评论 ;最后构造一个 Open GL 的虚拟环境 ,用户可以在球场上漫游 。

Recently, sports analysis and annotation become a hot issue in the fields of multimedia. In this paper, we present a practical system to convert a video sequence of soccer game into an animated virtual 3D scene. The system tracks players with a color based segmentation algorithm and template matching method. The 3D positions of players can be computed from the rectified mosaics of the whole scene. A Kalman filter is used to remove noise. The height of ball in air can be recovered by parabola approximation. According to the trajectory of players and ball, the system can recognize the behaviors of players and comment on the game automatically like a human being. At last, an OpenGL based virtual soccer scene will be constructed.