IPSJ Transactions on Computer Vision and Applications
Online ISSN : 1882-6695
ISSN-L : 1882-6695
Fisher Vector based on Full-covariance Gaussian Mixture Model
Masayuki TanakaAkihiko ToriiMasatoshi Okutomi
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2013 Volume 5 Pages 50-54

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Abstract

In image retrieval applications, the Fisher vector of the Gaussian mixture model (GMM) with a diagonal-covariance structure is known as a powerful tool to describe an image by aggregating local descriptors extracted from the image. In this paper, we propose the Fisher vector of the GMM with a full-covariance structure. The closed-form approximation of the GMM with a full-covariance structure is derived. Our observation is that the Fisher vector of a higher dimensional GMM yields higher image retrieval performance. The Fisher vector for the GMM with a block-diagonal-covariance structure is also introduced to provide moderate dimensionality for the GMM. Experimental comparisons performed using two major datasets demonstrate that the proposed Fisher vector outperforms state-of-the-art algorithms.

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© 2013 by the Information Processing Society of Japan
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