Analysis of Player Motion in Sport Matches

The system for analysis of player motion during sport matches, developed at University of Ljubljana is presented. The system allows for non-intrusive measurement of positions of all players in indoor sports through whole match, using only inexpensive video equipment cameras mounted on the ceiling of the sports hall. Tracking process (obtaining trajectories from videos) is automatic and only supervised by operator, to initialize player positions at the beginning and correct the mistakes during the tracking. The software provides means for user friendly calibration of video data using court markings of each supported sport as reference coordinates. The system has been tested for European handball, basketball, squash and tennis. Manual annotations can be added, to complement the quantitative data. Software keeps synchronization between annotations and trajectory data and provides means to use custom annotation dictionaries. Due to calibration, the results are provided in court coordinates (meters, centimeters) and can be exported (synchronized with annotations in same file) for further analysis with any application (e.g. Microsoft Excel, SPSS). Software itself supports several types of graphical data presentation.