06801637 is referenced by 396 patents and cites 1 patents.

An optical system tracks the motion of objects, including the human body or portions thereof using a plurality of three-dimensional active markers based upon triangulation from data read via multiple linear CCDs through cylindrical lenses. Each marker is lit in sequence so that it is in sync with a frame capture using the imaging system positioned and oriented so as to provide a basis for computing three-dimensional location. In the preferred embodiment, the imaging system detects an infrared signal which is sent out by the tag controller as part of the tag/marker illumination sequence at the beginning of the first tag position capture time. The controller then traverses through the tags in time sync with each imaging system frame capture cycle. Thus, only one unique tag will be lit during each image capture of the cameras, thereby simplifying identification. Using linear CCD sensors, the frame time (i.e. point acquisition time) is very short, allowing very many markers to be sampled and located sequentially in real time.

Title
Optical body tracker
Application Number
9/791123
Publication Number
6801637 (B2)
Application Date
February 22, 2001
Publication Date
October 5, 2004
Inventor
Charles J Jacobus
Ann Arbor
MI, US
Nestor Voronka
Ann Arbor
MI, US
Agent
Gifford Krass Groh Sprinkle Anderson & Citkowski PC
US
Assignee
Cybernet Systems Corporation
MI, US
IPC
G06K 9/00
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