University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Dynamic Dictionary Optimization for Sparse-representation-based Face Classification using Local Difference Images

Shao, C, Song, X, Feng, Zhenhua, Wu, X-J and Zheng, Y (2017) Dynamic Dictionary Optimization for Sparse-representation-based Face Classification using Local Difference Images Information Sciences, 393. pp. 1-14.

[img] Text
New-TSLSRC_elsarticle-template.pdf - Accepted version Manuscript
Restricted to Repository staff only until 8 February 2018.
Available under License : See the attached licence file.

Download (1MB)
[img]
Preview
Text (licence)
SRI_deposit_agreement.pdf
Available under License : See the attached licence file.

Download (33kB) | Preview

Abstract

In this study, we present a new sparse-representation-based face-classification algorithm that exploits dynamic dictionary optimization on an extended dictionary using synthesized faces. More specifically, given a dictionary consisting of face examples, we first augment the dictionary with a set of virtual faces generated by calculating the image difference of a pair of faces. This results in an extended dictionary with hybrid training samples, which enhances the capacity of the dictionary to represent new samples. Second, to reduce the redundancy of the extended dictionary and improve the classification accuracy, we use a dictionary-optimization method. We truncate the extended dictionary with a more compact structure by discarding the original samples with small contributions to represent a test sample. Finally, we perform sparserepresentation- based face classification using the optimized dictionary. Experimental results obtained using the AR and FERRET face datasets demonstrate the superiority of the proposed method in terms of accuracy, especially for small-sample-size problems.

Item Type: Article
Subjects : Electronic Engineering
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Shao, CUNSPECIFIEDUNSPECIFIED
Song, XUNSPECIFIEDUNSPECIFIED
Feng, Zhenhuaz.feng@surrey.ac.ukUNSPECIFIED
Wu, X-JUNSPECIFIEDUNSPECIFIED
Zheng, YUNSPECIFIEDUNSPECIFIED
Date : 8 February 2017
Identification Number : 10.1016/j.ins.2017.02.017
Copyright Disclaimer : © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Sparse representation, face classification, data augmentation, dictionary optimization
Depositing User : Symplectic Elements
Date Deposited : 15 Feb 2017 13:42
Last Modified : 07 Jul 2017 08:27
URI: http://epubs.surrey.ac.uk/id/eprint/813550

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800