Real-time tracking of non-rigid objects using mean shift
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United States of America Patent
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Jul 8, 2003
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app pub date -
Feb 14, 2000
filing date -
Feb 14, 2000
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Abstract
A method and apparatus for real-time tracking of a non-rigid target. The tracking is based on visual features, such as color and/or texture, where statistical distributions of those features characterize the target. A degree of similarity (.rho.(y.sub.0)) is computed between a given target (at y.sub.0) in a first frame and a candidate target (at y.sub.1) in a successive frame, the degree being expressed by a metric derived from the Bhattacharyya coefficient. A gradient vector corresponding to a maximization of the Bhattacharyya coefficient is used to derive the most probable location of the candidate target in the successive frame.
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