Discriminative embedding via image-to-class distances

Zhen, Xiantong, Shao, Ling and Zheng, Feng (2014) Discriminative embedding via image-to-class distances. In: Proceedings British Machine Vision Conference 2014. British Machine Vision Association Press. ISBN 1-901725-52-9

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Official URL: http://dx.doi.org/10.5244/C.28.33

Abstract

Image-to-Class (I2C) distance firstly proposed in the naive Bayes nearest neighbour (NBNN) classifier has shown its effectiveness in image classification. However, due to the large number of nearest-neighbour search, I2C-based methods are extremely time-consuming, especially with highdimensional local features. In this paper, with the aim to improve and speed up I2C-based methods, we propose a novel discriminative embedding method based on I2C for local feature dimensionality reduction. Our method 1) greatly reduces the computational burden and improves the performance of I2C-based methods after reduction; 2) can well preserve the discriminative ability of local features, thanks to the use of I2C distances; and 3) provides an efficient closed-form solution by formulating the objective function as an eigenvector decomposition problem. We apply the proposed method to action recognition showing that it can significantly improve I2C-based classifiers.

Item Type: Book Section
Subjects: G400 Computer Science
G700 Artificial Intelligence
Department: Faculties > Engineering and Environment > Computer Science and Digital Technologies
Depositing User: Nicola King
Date Deposited: 16 Jun 2015 13:32
Last Modified: 21 Jun 2017 10:31
URI: http://nrl.northumbria.ac.uk/id/eprint/22932

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