Wide area optical user tracking in unconstrained indoor environments

In this paper, we present a robust infrared optical 3D position tracking for wide area indoor environments up to 30m. The systemconsists of two shutter-synchronized cameras that track multipletargets, which are equipped with infrared light emitting diodes.Our system is able to learn targets as well as to perform extrinsiccalibration and 3D position tracking in unconstrained environments,which exhibit occlusions and static as well as locomotiveinterfering infrared lights. Tracking targets can directly be usedfor calibration which minimizes the amount of necessary hardware.With the presented approach, limitations of state-of-the-art trackingsystems in terms of volume coverage, sensitivity during trainingand calibration, setup complexity and hardware costs can beminimized. Preliminary results indicate interactive tracking withminimal jitter < 0.0675mm and 3D point accuracy of < 9.22mmthroughout the entire tracking volume up to 30m.