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Summary: Archipelago: Nonparametric Bayesian Semi-Supervised Learning
Ryan Prescott Adams rpa23@cam.ac.uk
Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, UK
Zoubin Ghahramani zoubin@eng.cam.ac.uk
Engineering Department, University of Cambridge, Cambridge CB2 1PZ, UK
Machine Learning Department, Carnegie Mellon University, Pittsburgh, PA 15213
Abstract
Semi-supervised learning (SSL), is classifica-
tion where additional unlabeled data can be
used to improve accuracy. Generative ap-
proaches are appealing in this situation, as
a model of the data's probability density can
assist in identifying clusters. Nonparametric
Bayesian methods, while ideal in theory due
to their principled motivations, have been dif-
ficult to apply to SSL in practice. We present
a nonparametric Bayesian method that uses
Gaussian processes for the generative model,
avoiding many of the problems associated
with Dirichlet process mixture models. Our
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