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One-shot learning of object categories

Li, Fei-Fei and Fergus, Rob and Perona, Pietro (2006) One-shot learning of object categories. IEEE Transactions on Pattern Analysis and Machine Intelligence, 28 (4). pp. 594-611. ISSN 0162-8828.

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Learning visual models of object categories notoriously requires hundreds or thousands of training examples. We show that it is possible to learn much information about a category from just one, or a handful, of images. The key insight is that, rather than learning from scratch, one can take advantage of knowledge coming from previously learned categories, no matter how different these categories might be. We explore a Bayesian implementation of this idea. Object categories are represented by probabilistic models. Prior knowledge is represented as a probability density function on the parameters of these models. The posterior model for an object category is obtained by updating the prior in the light of one or more observations. We test a simple implementation of our algorithm on a database of 101 diverse object categories. We compare category models learned by an implementation of our Bayesian approach to models learned from by maximum likelihood (ML) and maximum a posteriori (MAP) methods. We find that on a database of more than 100 categories, the Bayesian approach produces informative models when the number of training examples is too small for other methods to operate successfully.

Item Type:Article
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Perona, Pietro0000-0002-7583-5809
Additional Information:© 2006 IEEE Manuscript received 30 Aug. 2004; revised 12 July 2005; accepted 12 July 2005; published online 14 Feb. 2006. [Posted online: 2006-02-21] Recommended for acceptance by R. Basri. The authors would like to thank Andrew Zisserman, David Mackay, Brian Ripley, and Joel Lindop. This work was supported by the Caltech CNSE, the UK EPSRC, and EC Project CogViSys.
Subject Keywords:Recognition, object categories, learning, few images, unsupervised, variational inference, priors
Issue or Number:4
Record Number:CaltechAUTHORS:LIFieeetpami06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5407
Deposited By: Archive Administrator
Deposited On:16 Oct 2006
Last Modified:02 Oct 2019 23:22

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