We describe a method for calibrating an electromagnetic motion tracking device. Algorithms for correcting both location and orientation are presented. In particular, we use a method for interpolating rotation corrections at scattered data points that has not previously been used in this context. This method, unlike previous methods, is rooted in the geometry of the space of rotations. We give results showing large improvements in both location and orientation errors. The methods are shown to impose a minimal computational burden.
Conference Title: Presence: Teleoperators and Virtual Environments
Pub Type: Conferences
barycentric coordinates, electromagnetic tracker, immersive visualization, rotation interpolation, spherical interpolation, tracker calibration, virtual reality