Robust and Scalable Bayesian Online Changepoint Detection

Published: 19 Jun 2023, Last Modified: 28 Jul 20231st SPIGM @ ICML PosterEveryoneRevisionsBibTeX
Keywords: Changepoint detection, generalised Bayes, Score-matching, robust Bayes
Abstract: This paper proposes an online, provably robust, and scalable Bayesian approach for changepoint detection. The resulting algorithm has key advantages over previous work: it provides provable robustness by leveraging the generalised Bayesian perspective and also addresses the scalability issues of previous attempts. Specifically, the proposed generalised Bayesian formalism leads to conjugate posteriors whose parameters are available in closed form by leveraging diffusion score matching. The resulting algorithm is exact and can be updated through simple algebra.
Submission Number: 16
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