Fast structural metric learning

Brian McFee and Gert Lanckriet
May 3, 2012

We develop an efficient optimization procedure for learning linear transformations of data to produce structured outputs, e.g., nearest-neighbor rankings or connectivity graphs induced by distance. The proposed method solves a semi-definite programming problem by reducing to a sequence of small quadratic programs, resulting in significant reductions in training complexity. Experiments demonstrate that the proposed method is robust, efficient, and outperforms alternative methods in high-noise settings.

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