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7 March 2014 High-speed active head tracking system
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We report on the development of a highly scalable head-tracking system capable of tracking many users. Throughout the operating area, a series of high-speed (4 kHz) near-infrared LED-based Digital Light Processor (DLP) picoprojectors provide overlapping illumination of the volume. Each projector outputs a sequence of binary images which encode the position of each pixel within the projected image as well as an identifier sequence for the projector. Overlapping projectors use differing temporal multiplexing to allow sensor discrimination and background rejection. Pixel positions from multiple projectors received by each sensor are triangulated to obtain position and orientation.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
V. Markov, S. A. Kupiec, A. Hastings, and T. Hester "High-speed active head tracking system", Proc. SPIE 8979, Emerging Digital Micromirror Device Based Systems and Applications VI, 89790B (7 March 2014);

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