抄録
A method of reconstructing the 3D trajectories of a ball with two unsynchronized cameras is proposed. Currently, the common devices for 3D sensing in sports match scenario are time-synchronized cameras. There, however, exist several difficulties to conduct it. The method proposed in this paper requires only two known 3D coordinates and unsynchronized cameras. The key feature of the method is to use balls for camera calibration and the estimation of time-shift of between a camera and the other camera. The method is experimentally verified that it could provide accurate 3D ball trajectories.
