標題: Court Reconstruction for Camera Calibration in Broadcast Basketball Videos
作者: Wen, Pei-Chih
Cheng, Wei-Chih
Wang, Yu-Shuen
Chu, Hung-Kuo
Tang, Nick C.
Liao, Hong-Yuan Mark
資訊工程學系
Department of Computer Science
關鍵字: Camera calibration;basketball;stroke;player trajectory;video retrieval
公開日期: May-2016
摘要: We introduce a technique of calibrating camera motions in basketball videos. Our method particularly transforms player positions to standard basketball court coordinates and enables applications such as tactical analysis and semantic basketball video retrieval. To achieve a robust calibration, we reconstruct the panoramic basketball court from a video, followed by warping the panoramic court to a standard one. As opposed to previous approaches, which individually detect the court lines and corners of each video frame, our technique considers all video frames simultaneously to achieve calibration; hence, it is robust to illumination changes and player occlusions. To demonstrate the feasibility of our technique, we present a stroke-based system that allows users to retrieve basketball videos. Our system tracks player trajectories from broadcast basketball videos. It then rectifies the trajectories to a standard basketball court by using our camera calibration method. Consequently, users can apply stroke queries to indicate how the players move in gameplay during retrieval. The main advantage of this interface is an explicit query of basketball videos so that unwanted outcomes can be prevented. We show the results in Figs. 1, 7, 9, 10 and our accompanying video to exhibit the feasibility of our technique.
URI: http://dx.doi.org/10.1109/TVCG.2015.2440236
http://hdl.handle.net/11536/133408
ISSN: 1077-2626
DOI: 10.1109/TVCG.2015.2440236
期刊: IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
Volume: 22
Issue: 5
起始頁: 1517
結束頁: 1526
Appears in Collections:Articles