We present a framework for online inference in the presence of a nonexhaustively defined set of classes that incorporates supervised classification with class discovery and modeling. A Dirichlet process prior (DPP) model defined over class distributions ensures that both known and unknown class distributions originate according to a common base distribution. In an attempt to automatically discover potentially interesting class formations, the prior model is coupled with a suitably chosen data model, and sequential Monte Carlo sampling is used to perform online inference. Our research is driven by a biodetection application, where a new class of pathogen may suddenly appear, and the rapid increase in the number of samples originating from this class indicates the onset of an outbreak.
Murat et al. REF defined a Dirichlet process prior model over class distributions to ensure that both known and unknown class distributions originate according to a common base distribution.
Bayesian Nonexhaustive Learning for Online Discovery and Modeling of Emerging Classes
ArXiv
ArXiv
Mathematics Computer Science