DocumentCode :
1642273
Title :
The Hedgehog: a novel optical tracking method for spatially immersive displays
Author :
Vorozcovs, A. ; Hogue, A. ; Stuerzlinger, W.
Author_Institution :
Dept. of Comput. Sci. & Eng., York Univ., Toronto, Ont., Canada
fYear :
2005
Firstpage :
83
Lastpage :
89
Abstract :
Existing commercial technologies do not adequately meet the requirements for tracking in fully-enclosed VR displays. We present the Hedgehog, which overcomes several limitations imposed by existing sensors and tracking technology. The tracking system robustly and reliably estimates the 6DOF pose of the device with high accuracy and a reasonable update rate. The system is composed of several cameras viewing the display walls and an arrangement of laser diodes secured to the user. The light emitted from the lasers projects onto the display walls and the 2D centroids of the projections are tracked to estimate the 6DOF pose of the device. The system is able to handle ambiguous laser projection configurations, static and dynamic occlusions of the lasers, and incorporates an intelligent laser activation control mechanism that determines which lasers are most likely to improve the pose estimate. The Hedgehog is also capable of performing auto-calibration of the necessary camera parameters through the use of the SCAAT algorithm. A preliminary evaluation reveals that the system has an angular resolution of 0.01 degrees RMS and a position resolution of 0.2 mm RMS.
Keywords :
calibration; cameras; computer displays; computer vision; tracking; virtual reality; 2D centroids; 6DOF tracking; Hedgehog; SCAAT algorithm; auto-calibration; cameras; display walls; enclosed virtual reality displays; intelligent laser activation control; laser diodes; laser dynamic occlusions; laser projection; laser static occlusions; optical tracking method; pose estimation; spatially immersive displays; tracking system; vision-based tracking; Cameras; Computer displays; Head; Layout; Light emitting diodes; Photodiodes; Robustness; Spatial resolution; Tracking; Virtual reality;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Virtual Reality, 2005. Proceedings. VR 2005. IEEE
Conference_Location :
Bonn
Print_ISBN :
0-7803-8929-8
Type :
conf
DOI :
10.1109/VR.2005.1492757
Filename :
1492757
Link To Document :
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