Validation-Based Sparse Gaussian Process Classifier Design

Shevade, Shirish and Sundararajan, S (2009) Validation-Based Sparse Gaussian Process Classifier Design. In: Neural Computation, 21 (7). pp. 2082-2103.

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Abstract

Gaussian processes (GPs) are promising Bayesian methods for classification and regression problems. Design of a GP classifier and making predictions using it is, however, computationally demanding, especially when the training set size is large. Sparse GP classifiers are known to overcome this limitation. In this letter, we propose and study a validation-based method for sparse GP classifier design. The proposed method uses a negative log predictive (NLP) loss measure, which is easy to compute for GP models. We use this measure for both basis vector selection and hyperparameter adaptation. The experimental results on several real-world benchmark data sets show better orcomparable generalization performance over existing methods.

Item Type:	Journal Article
Publication:	Neural Computation
Publisher:	MIT Pres
Additional Information:	Copyright of this article belongs to MIT Pres.
Department/Centre:	Division of Electrical Sciences > Computer Science & Automation
Date Deposited:	14 Dec 2009 05:48
Last Modified:	19 Sep 2010 05:35
URI:	http://eprints.iisc.ac.in/id/eprint/21109

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