22 December 2000 Tracking of object points in a photogrammetric motion capture system
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Abstract
Target tracking and trajectory building are essential elements of vision-based motion capture systems for biomechanics applications. Optimal performance of multi- camera, real-time video metric system for the recovery of motion analysis parameters depends not only on the incorporation of rigorous photogrammetric processes, but also upon robust and reliable object point tracking. This paper discusses developments related to object point tracking within a motino capture system being developed for use in a biomechanics laboratory. The path generation sequence for object targets is first outlined, after which an account of the formulation of a kinematic model based on the alpha-beta-gamma filter/predictor is provided. The process of tracking in both 2D image space and 3D object space is then discussed, and initial result form practical experiments are summarized. These results indicate that the proposed object tracking and trajectory building approach can provide robust performance and an operation sped which is sufficient to a low real-time 3D target tracking at standard video frame rates and beyond.
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Clive S. Fraser, Clive S. Fraser, Juliang Shao, Juliang Shao, } "Tracking of object points in a photogrammetric motion capture system", Proc. SPIE 4309, Videometrics and Optical Methods for 3D Shape Measurement, (22 December 2000); doi: 10.1117/12.410876; https://doi.org/10.1117/12.410876
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