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8 December 1986 Software for Automatic Tracking of Moving Targets in Three Dimensions
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A variety of techniques for quantification and analysis of three dimensional movement has been described in the literature, but a number of practical problems limit their application. Such problems include: the requirement that moving objects be encumbered by wires attached to sensors or to active targets; undue constraint upon the number, location and orientation of imaging devices; inability to automatically track multiple targets; confounding the three dimensional trajectories of targets whose paths cross in two dimensional images; and lack of editing functions and adequate graphic feedback enabling the user to rapidly detect--and then easily correct--errors in tracking. The present paper describes software enchancements to the video-based ExpertVision system produced by Motion Analysis Corporation which provide for the analysis of movement in three dimensional space. The system can acquire time-matched digitized video data at frame-rates of 60, 200 or 2000 Hz using a variety of camera/VCR combinations. Software (and supporting hardware) has been developed to automatically calibrate multiple cameras and does not limit the investigator to utilize particular camera configurations. Additional software has been written to automatically track targets as they move through three dimensional space, to interactively edit three dimensional trajectories both during tracking and after the trajectories are computed, to display the data and to support three dimensional motion analysis.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Robert S. Wilson "Software for Automatic Tracking of Moving Targets in Three Dimensions", Proc. SPIE 0693, High Speed Photography, Videography, and Photonics IV, (8 December 1986);


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