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Published byAngelica Payne Modified over 10 years ago
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Brief Summary: Target Tracking from a moving platform Jackie Brosamer
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Overview We want to track objects with a moving platform, using a map as a reference Local Association: link detected regions within a sliding window and generate tracklets Global Association: link tracklets and maintain track IDs
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Map-Enhanced Detection Use global map such as a satellite image as reference frame for moving platform instead of first frame Reduced accumulated error Makes coordinates more meaningful (dimensions, latitude/longitude)
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Geo-Registration First, use homography between consecutive frames Second, refine homography between image and map
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Moving Regions For stationary, image sequence modeled at pixel level For moving, we fist model motion and then estimate background Adopt sliding window method
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Local Data Association Maximize posterior of platforms to create tracklets Based on temporal compatibility within one track and spatial compatibility between tracks
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Formulation Noisy Data Observations: Find cover over time: Based on –Spatial association –Temporal Association
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MCMC Data associations Use monte carlo simulation to partition tracks Determine extension/reduction, birth/death, split/move
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Global Tracklets Distribution Looks at longer time span to properly association tracklets with identity (esp when longer occlusion etc)
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