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Learning generative visual models from few training examples: An incremental Bayesian approach tested on 101 object categories

Li, Fei-Fei and Fergus, Rob and Perona, Pietro (2007) Learning generative visual models from few training examples: An incremental Bayesian approach tested on 101 object categories. Computer Vision and Image Understanding, 106 (1). pp. 59-70. ISSN 1077-3142. doi:10.1016/j.cviu.2005.09.012.

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Current computational approaches to learning visual object categories require thousands of training images, are slow, cannot learn in an incremental manner and cannot incorporate prior information into the learning process. In addition, no algorithm presented in the literature has been tested on more than a handful of object categories. We present an method for learning object categories from just a few training images. It is quick and it uses prior information in a principled way. We test it on a dataset composed of images of objects belonging to 101 widely varied categories. Our proposed method is based on making use of prior information, assembled from (unrelated) object categories which were previously learnt. A generative probabilistic model is used, which represents the shape and appearance of a constellation of features belonging to the object. The parameters of the model are learnt incrementally in a Bayesian manner. Our incremental algorithm is compared experimentally to an earlier batch Bayesian algorithm, as well as to one based on maximum likelihood. The incremental and batch versions have comparable classification performance on small training sets, but incremental learning is significantly faster, making real-time learning feasible. Both Bayesian methods outperform maximum likelihood on small training sets.

Item Type:Article
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Perona, Pietro0000-0002-7583-5809
Additional Information:© 2006 Elsevier Inc. Received 15 August 2005; accepted 19 September 2005. Communicated by Arthur E. C. Pece. Available online 9 March 2007. The authors thank Marc’Aurelio Ranzato and Marco Andreetto for their help in image collection.
Subject Keywords:Object recognition; Categorization; Generative model; Incremental learning; Bayesian model
Issue or Number:1
Record Number:CaltechAUTHORS:20100917-094732886
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20008
Deposited By: Jason Perez
Deposited On:17 Sep 2010 18:05
Last Modified:08 Nov 2021 23:56

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