Discovering Similar Multidimensional Trajectories
ICDE '02 Proceedings of the 18th International Conference on Data Engineering
Robust and fast similarity search for moving object trajectories
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
Trajectory based event tactics analysis in broadcast sports video
Proceedings of the 15th international conference on Multimedia
On the marriage of Lp-norms and edit distance
VLDB '04 Proceedings of the Thirtieth international conference on Very large data bases - Volume 30
Efficient similar trajectory-based retrieval for moving objects in video databases
CIVR'03 Proceedings of the 2nd international conference on Image and video retrieval
A tennis video indexing approach through pattern discovery in interactive process
PCM'04 Proceedings of the 5th Pacific Rim conference on Advances in Multimedia Information Processing - Volume Part I
Learning semantic scene models by trajectory analysis
ECCV'06 Proceedings of the 9th European conference on Computer Vision - Volume Part III
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Unlike traditional audience oriented semantic analysis in sports video, tactic analysis aims to assist the professionals to improve their training performance and adopt proper tactics in the game. Trajectories of ball and players contain temporal and spatial motion information, which is a representative feature for tactic analysis. We propose a generic scheme to discover tactics in classified trajectories in the same events. Local similarity measurement between trajectories is developed for trajectory matching to reduce the noise in the broadcast sports video. Transductive classifier with the learnt bias of low-level features of the trajectories is introduced to deal with different games and classify trajectories into tactic events only using a small labeled dataset. Frequent pattern mining is employed to find the tactics based on the subsequences of the classified trajectories. Experiments show that the proposed approach achieves promising tactics discovery results in different broadcast sports game videos.