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ABSTRACT

In basketball games, wild-open means that there is an offensive player not well defended by his/her opponents. The occurrence of wild-open usually implies the existence of a successful offense tactic. In this paper, a Wild-Open Warning (WOW) system is designed to assist basketball coaches/players in revealing possible tactics of their opponents through watching the broadcast game videos. The system automatically extracts semantic objects such as the court and the players in the video, and calibrates the players' positions to the real-world court coordinates. A robust and efficient algorithm for court detection and camera calibration is proposed for basketball videos. Wild-open is detected when the position of an offensive player satisfies three predefined criteria. In the mean time, the system will mark the wild-open players to warn the viewers such that they should keep attention to certain players.

REFERENCES

• 1: Guangyu Zhu , Qingming Huang , Changsheng Xu , Yong Rui , Shuqiang Jiang , Wen Gao , Hongxun Yao, Trajectory based event tactics analysis in broadcast sports video, Proceedings of the 15th international conference on Multimedia, September 25-29, 2007, Augsburg, Germany [doi>10.1145/1291233.1291250]
• 2: Hua-Tsung Chen , Ming-Chun Tien , Yi-Wen Chen , Wen-Jiin Tsai , Suh-Yin Lee, Physics-based ball tracking and 3D trajectory reconstruction with applications to shooting location estimation in basketball video, Journal of Visual Communication and Image Representation, v.20 n.3, p.204-216, April, 2009 [doi>10.1016/j.jvcir.2008.11.008]
• 3: John G. Allen , Richard Y. D. Xu , Jesse S. Jin, Object tracking using CamShift algorithm and multiple quantized feature spaces, Proceedings of the Pan-Sydney area workshop on Visual information processing, p.3-7, June 01, 2004
• 4: Hanjalic, A. 2002. Shot-boundary detection: unraveled and resolved? IEEE Transactions on Circuits and Systems for Video Technology, 12(2):90--105
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INDEX TERMS

Primary Classification:
  H. Information Systems
  H.3 INFORMATION STORAGE AND RETRIEVAL
      H.3.1 Content Analysis and Indexing
          Subjects: Abstracting methods

General Terms:
Algorithms, Measurement

Keywords:
basketball video, camera calibration, player tracking