1
Daniel F DeMenthon: Computer vision system for position monitoring in three dimensions using non-coplanar light sources attached to a monitored object. University of Maryland, Christopher N Sears, July 13, 1993: US05227985 (335 worldwide citation)

A sensing system for monitoring the position and orientation of a rigid object (20). At least 4 point light sources (24) are mounted on the surface of the object (20) in a noncoplanar arrangement. A single electronic camera (26) captures images (59) of the point light sources (24). Locations of the ...


2
Redundant Reciprocal Tracking System. February 22, 2018: US20180049809-A1

The present invention relates to a redundant reciprocal tracking system composed of at least two trackers 10. A first tracker is able to sense partial or full pose data (orientation and position) of a second tracker in a first reference frame and the second tracker is able to sense partial or full p ...