Hierarchical and conditional combination of belief functions induced by visual tracking |
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Authors: | John Klein Christèle Lecomte |
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Institution: | a LAGIS, University of Lille1, UMR CNRS 8146, France b LITIS, University of Rouen, EA 4108, France |
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Abstract: | In visual tracking, sources of information are often disrupted and deliver imprecise or unreliable data leading to major data fusion issues. In the Dempster-Shafer framework, such issues can be addressed by attempting to design robust combination rules. Instead of introducing another rule, we propose to use existing ones as part of a hierarchical and conditional combination scheme. The sources are represented by mass functions which are analysed and labelled regarding unreliability and imprecision. This conditional step divides the problem into specific sub-problems. In each of these sub-problems, the number of constraints is reduced and an appropriate rule is selected and applied. Two functions are thus obtained and analysed, allowing another rule to be chosen for a second (and final) fusion level. This approach provides a fast and robust way to combine disrupted sources using contextual information brought by a particle filter. Our experiments demonstrate its efficiency on several visual tracking situations. |
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Keywords: | Dempster-Shafer theory Combination rules Visual tracking |
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