Ballistic Tracking - A True Zero Latency Gaming Interface

In this paper, we describe a new gaming interface, enabling human-computer interaction mediated by flying objects thrown at the computer display. The objects are tracked midair and the trajectories calculated before the actual hit. By extrapolating these trajectories, true zero latency for the interaction has been demonstrated in proof-of-concept games. The full spatiotemporal accuracy of this very low-cost system is shown to be of the order of 10 mm and 1 ms, with up to 50 ms predictability.