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Dominant Sets and Pairwise Clustering

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2 Author(s)
Pavan, M. ; Dipt. di Informatica, Universitd Ca'' foscari di Venezia, Venezia Mestre ; Pelillo, M.

We develop a new graph-theoretic approach for pairwise data clustering which is motivated by the analogies between the intuitive concept of a cluster and that of a dominant set of vertices, a notion introduced here which generalizes that of a maximal complete subgraph to edge-weighted graphs. We establish a correspondence between dominant sets and the extrema of a quadratic form over the standard simplex, thereby allowing the use of straightforward and easily implementable continuous optimization techniques from evolutionary game theory. Numerical examples on various point-set and image segmentation problems confirm the potential of the proposed approach

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:29 ,  Issue: 1 )