Evaluation of a haptic mixed reality system for interactions with a virtual control panel
Presence: Teleoperators and Virtual Environments - Special section: Legal, ethical, and policy issues associated with virtual environments and computer mediated reality
Correction of Location and Orientation Errors in Electromagnetic Motion Tracking
Presence: Teleoperators and Virtual Environments
Applying natural neighbor coordinates for electromagnetic tracker calibration
ISCIS'06 Proceedings of the 21st international conference on Computer and Information Sciences
Study on attitude measurement system for virtual surgery navigation
Edutainment'06 Proceedings of the First international conference on Technologies for E-Learning and Digital Entertainment
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This paper presents a three-level tracker calibrationsystem that greatly reduces errors in tracked position andorientation. The first level computes an error-minimizingrigid body transform that eliminates the need for precisealignment of a tracker base frame. The second corrects forfield warp by interpolating correction values stored withvertices in a tetrahedrization of warped space. The thirdperforms an alternative field warp calibration byinterpolating corrections in the parameter space of atricubic spline model of field warp. The system isevaluated for field warp calibration near a passive-hapticpanel in both low-warp and high-warp environments. Thespline method produces the most accurate results,reducing median position error by over 90% and medianorientation error by over 80% when compared to the useof only a rigid body transform.