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Proceedings Paper

Highly accurate video coordinate generation for automatic 3-D trajectory calculation
Author(s): A. Macleod; Julian R. W. Morris; M. Lyster
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Paper Abstract

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.

Paper Details

Date Published: 1 August 1990
PDF: 7 pages
Proc. SPIE 1356, Image-Based Motion Measurement, (1 August 1990); doi: 10.1117/12.23905
Show Author Affiliations
A. Macleod, Oxford Metrics Ltd. (United Kingdom)
Julian R. W. Morris, Oxford Metrics Ltd. (United Kingdom)
M. Lyster, Oxford Metrics Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 1356:
Image-Based Motion Measurement
James S. Walton, Editor(s)

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