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Authors: Shibo Gao 1 ; Yizhou Yu 2 and Yongmei Cheng 1

Affiliations: 1 College of Automation and Northwestern Polytechnical University, China ; 2 The University of Hong Kong, Hong Kong

Keyword(s): Face Recognition, Linear Subspace Learning, Discriminative Dictionary Learning.

Abstract: Learning linear subspaces for high-dimensional data is an important task in pattern recognition. A modern approach for linear subspace learning decomposes every training image into a more discriminative part (MDP) and a less discriminative part (LDP) via sparse coding before learning the projection matrix. In this paper, we present a new linear subspace learning algorithm through discriminative dictionary learning. Our main contribution is a new objective function and its associated algorithm for learning an overcomplete discriminative dictionary from a set of labeled training examples. We use a Fisher ratio defined over sparse coding coefficients as the objective function. Atoms from the optimized dictionary are used for subsequent image decomposition. We obtain local MDPs and LDPs by dividing images into rectangular blocks, followed by blockwise feature grouping and image decomposition. We learn a global linear projection with higher classification accuracy through the local MDPs a nd LDPs. Experimental results on benchmark face image databases demonstrate the effectiveness of our method. (More)

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Paper citation in several formats:
Gao, S.; Yu, Y. and Cheng, Y. (2013). Linear Subspace Learning based on a Learned Discriminative Dictionary for Sparse Coding. In Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2013) - Volume 1: VISAPP; ISBN 978-989-8565-47-1; ISSN 2184-4321, SciTePress, pages 530-538. DOI: 10.5220/0004207905300538

@conference{visapp13,
author={Shibo Gao. and Yizhou Yu. and Yongmei Cheng.},
title={Linear Subspace Learning based on a Learned Discriminative Dictionary for Sparse Coding},
booktitle={Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2013) - Volume 1: VISAPP},
year={2013},
pages={530-538},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004207905300538},
isbn={978-989-8565-47-1},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the International Conference on Computer Vision Theory and Applications (VISIGRAPP 2013) - Volume 1: VISAPP
TI - Linear Subspace Learning based on a Learned Discriminative Dictionary for Sparse Coding
SN - 978-989-8565-47-1
IS - 2184-4321
AU - Gao, S.
AU - Yu, Y.
AU - Cheng, Y.
PY - 2013
SP - 530
EP - 538
DO - 10.5220/0004207905300538
PB - SciTePress

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