Tracking Nuclear Material at Low Frame Rate and Numerous False Alarms
نویسندگان
چکیده
In Nuclear Safeguards, surveillance cameras monitor the correct processing of nuclear material. Nuclear inspectors are faced with tens of thousands of images to review, of which less than 1% is significant. The Safeguards authorized means of reducing the image set is, at present, a two-frame differencing change-detection filter. We further limit the set by tracking flasks thanks to the timing of events provided by image time-stamps. Traditional visual tracking cannot be applied, owing to the low frame rate, and the need for compatibility with the authorized change detection filter. Our algorithm is based on a hidden semi-Markov model of the nuclear process, and handles multiple flasks and observations available only when the flasks are moved. State occupancy durations are used when selecting the next image to review.
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