Kernelized multi-graph matching
Appariement multiple de graphes avec des noyaux
Résumé
Multigraph matching is a recent variant of the graph matching problem. In this
framework, the optimization procedure considers several graphs and enforces the
consistency of the matches along the graphs. This constraint can be formalized as a
cycle consistency across the pairwise permutation matrices, which implies the definition
of a universe of vertex~\citep{pachauri2013solving}. The label of each vertex is encoded by
a sparse vector and the dimension of this space corresponds to the rank of the bulk
permutation matrix, the matrix built from the aggregation of all the pairwise
permutation matrices. The matching problem can then be formulated as a non-convex
quadratic optimization problem (QAP) under constraints imposed on the rank and the
permutations. In this paper, we introduce a novel kernelized multigraph matching
technique that handles vectors of attributes on both the vertices and edges of the graphs,
while maintaining a low memory usage. We solve the QAP problem using a projected power
optimization approach and propose several projectors leading to improved stability of
the results. We provide several experiments showing that our method is competitive
against other unsupervised methods.
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