Structure based feature extraction in basketball zone defence strategies
Zheng, A., Ma, J., PETRIDIS, MILTIADIS, Tang, J. and Luo, B. (2010) Structure based feature extraction in basketball zone defence strategies International Journal of Computer Science and Applications, 7 (3). pp. 18-32. ISSN 0972-9038
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Official URL: http://www.tmrfindia.org/ijcsa/v7i33.pdf
This paper proposes a framework for structure-based feature extraction in basketball zone-defense strategies. Firstly, a graphical representation for key-frames extracted from zone-defense video clips is introduced, where each key-frame is expressed in terms of a zone-defense graph, representing the positions of defenders and the ball. Secondly, defense-lines are defined and extracted from zone-defense graphs for each zone-defense strategy, based on which, a 10- dimentional feature vector with respect to the defense-lines is introduced to characterize the structure relationships. Experiments have been conducted for basketball zone-defense strategy detection on both simulated and real-life basketball zone-defense video database, which demonstrate the validation and practicability of such a structure based feature characterization, and, in particular, its robustness with respect to the disturbance of local transformation of subprime nodes in the graphs.
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