1 July 2002 Verification of tracker position measurement using digital video and instrumentation data recorded in flight
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Abstract
The function of the tracker image processing in our airborne FLIR tracking system is to continually measure the position of the tracked target relative to the image center. These positions are used by the line of sight control system to maintain the target in the center of the imaging sensor FOV. In order to perform an end-to-end test of the accuracy of the target positions measured by the tracker, we developed a verification method that makes use of instrumentation data and digital video recorded during flight test. The instrumentation data contains the track errors, which we wish to verify. A post-flight image analysis tool was developed to accurately measure the track positions in the flight recorded digital video for comparison to the recorded flight track errors. This tool made use of a correlation technique combined with a non-linear optimization procedure. The off-line track position estimates generated by this tool were then compared to those produced in flight by the tracker. This paper describes the algorithms used in the post-flight analysis to estimate the track positions from the digital video. The results of applying this verification technique to both a correlation tracker and a centroid tracker are then described.
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John E. Albus, John E. Albus, John R. Marcovici, John R. Marcovici, } "Verification of tracker position measurement using digital video and instrumentation data recorded in flight", Proc. SPIE 4714, Acquisition, Tracking, and Pointing XVI, (1 July 2002); doi: 10.1117/12.472593; https://doi.org/10.1117/12.472593
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