Learning the Parameters of Determinantal Point Process Kernels

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Raja Hafiz Affandi, Emily Fox, Ryan Adams, Ben Taskar ;
Proceedings of the 31st International Conference on Machine Learning, PMLR 32(2):1224-1232, 2014.

Abstract

Determinantal point processes (DPPs) are well-suited for modeling repulsion and have proven useful in applications where diversity is desired. While DPPs have many appealing properties, learning the parameters of a DPP is difficult, as the likelihood is non-convex and is infeasible to compute in many scenarios. Here we propose Bayesian methods for learning the DPP kernel parameters. These methods are applicable in large-scale discrete and continuous DPP settings, even when the likelihood can only be bounded. We demonstrate the utility of our DPP learning methods in studying the progression of diabetic neuropathy based on the spatial distribution of nerve fibers, and in studying human perception of diversity in images.

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