Towards Deterministic Diverse Subset Sampling

05/28/2021

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by   Joachim Schreurs, et al.

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Determinantal point processes (DPPs) are well known models for diverse subset selection problems, including recommendation tasks, document summarization and image search. In this paper, we discuss a greedy deterministic adaptation of k-DPP. Deterministic algorithms are interesting for many applications, as they provide interpretability to the user by having no failure probability and always returning the same results. First, the ability of the method to yield low-rank approximations of kernel matrices is evaluated by comparing the accuracy of the Nyström approximation on multiple datasets. Afterwards, we demonstrate the usefulness of the model on an image search task.