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A Theory of the Quasi-static World |
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@InProceedings{sanders:QSL:ICPR2002,
author = {Brandon C.S. Sanders and Randal C. Nelson and Rahul Sukthankar},
title = {A Theory of the Quasi-static World},
booktitle = {Proceedings of ICPR},
pages = {1--6},
year = 2002,
volume = 3,
address = {Quebec City, Canada},
month = aug # "~11--15",
abstract = { We present the theory behind a novel unsupervised
method for discovering quasi-static objects, objects
that are stationary during some interval of
observation, within image sequences acquired by any
number of uncalibrated cameras. For each pixel we
generate a signature that encodes the pixel's
temporal structure. Using the set of temporal
signatures gathered across views, we hypothesize a
global schedule of events and a small set of objects
whose arrivals and departures explain the events. The
paper specifies observability conditions under which
the global schedule can be established and presents
the QSL algorithm that generates the
maximally-informative mapping of pixels' observations
onto the objects they stem from. Our framework
ignores distracting motion, correctly deals with
complicated occlusions, and naturally groups
observations across cameras. The sets of 2D masks we
recover are suitable for unsupervised training and
initialization of object recognition and tracking
systems.},
annote = {Introduces Temporally Coherent Clusters (TCCs), signature
decomposition for quasi-online OD, the 2D Sched
algorithm,... },
}