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Highly accurate video coordinate generation for automatic 3-D trajectory calculation

Cartwright, Annabel, Morris, Julian R. W. and Lyster, M. 1990. Highly accurate video coordinate generation for automatic 3-D trajectory calculation. Presented at: Image-Based Motion Measurement, La Jolla , CA, 1 August 1990. Published in: Walton, James S. ed. Image-Based Motion Measurement, Proceedings of the Conference held at La Jolla , CA, 1 August 1990. SPIE Proceedings Series , vol.1356 (1356) Bellingham, WA: SPIE, pp. 12-18. 10.1117/12.23905

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Most TV-based motion analysis systems, including the original version of 1/ICON, produce 3D coordinates by combining pre-tracked 2D trajectories from each camera. The latest version of the system, VICON-VX, uses totally automatic 3D trajectory calculation using the Geometric Self Identification (GSI) technique. This is achieved by matching unsorted 2D image coordinates from all cameras, looking for intersecting marker 'rays', and matching intersections into 3D trajectories. Effective GSI, with low false-positive intersection rates is only possible with highly accurate 2D data, produced by stable, high-resolution coordinate generators, and incorporating appropriate compensation for lens distortions. Data capture software and hardware have been completely redesigned to achieve this accuracy, together with higher throughput rates and better resistance to errors. In addition, a new ADC facility has been incorporated to allow very high speed analog data acquisition, synchronised with video measurements.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Uncontrolled Keywords: Video; Cameras; Computer hardware; Data acquisition; Lenses; Motion analysis; Resistance; Software
Publisher: SPIE
ISSN: 0277786X
Last Modified: 04 Jun 2017 06:24

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