Abstract
In this paper, contents of tennis games are recognized automatically. 3-D positions of a ball and players are detected by using stereo camera method. The system detects ball bounces on a court and shots by players using vector directions of the ball velocity. The game ends are determined by the ball velocity and its position, and the game sequences are recognized automatically. The system also detects the shot style - forehand, backhand, volley, smash stroke - by using the existence of bounces before shots and the positional relation of the ball and the player's. Experiments were executed by using 7 game video data, and the automatic recognition results showed good coincidence with the results of human judgments.
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