An Integrated Approach for Efficient Analysis of Facial Expressions

Mehdi Ghayoumi, Arvind K. Bansal

Abstract

This paper describes a new automated facial expression analysis system that integrates Locality Sensitive Hashing (LSH) with Principal Component Analysis (PCA) and Linear Discriminant Analysis (LDA) to improve execution efficiency of emotion classification and continuous identification of unidentified facial expressions. Images are classified using feature-vectors on two most significant segments of face: eye segments and mouth-segment. LSH uses a family of hashing functions to map similar images in a set of collision-buckets. Taking a representative image from each cluster reduces the image space by pruning redundant similar images in the collision-buckets. The application of PCA and LDA reduces the dimension of the data-space. We describe the overall architecture and the implementation. The performance results show that the integration of LSH with PCA and LDA significantly improves computational efficiency, and improves the accuracy by reducing the frequency-bias of similar images during PCA and SVM stage. After the classification of image on database, we tag the collision-buckets with basic emotions, and apply LSH on new unidentified facial expressions to identify the emotions. This LSH based identification is suitable for fast continuous recognition of unidentified facial expressions.

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Paper Citation


in Harvard Style

Ghayoumi M. and Bansal A. (2014). An Integrated Approach for Efficient Analysis of Facial Expressions . In Proceedings of the 11th International Conference on Signal Processing and Multimedia Applications - Volume 1: SIGMAP, (ICETE 2014) ISBN 978-989-758-046-8, pages 211-219. DOI: 10.5220/0005116702110219


in Bibtex Style

@conference{sigmap14,
author={Mehdi Ghayoumi and Arvind K. Bansal},
title={An Integrated Approach for Efficient Analysis of Facial Expressions},
booktitle={Proceedings of the 11th International Conference on Signal Processing and Multimedia Applications - Volume 1: SIGMAP, (ICETE 2014)},
year={2014},
pages={211-219},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005116702110219},
isbn={978-989-758-046-8},
}


in EndNote Style

TY - CONF
JO - Proceedings of the 11th International Conference on Signal Processing and Multimedia Applications - Volume 1: SIGMAP, (ICETE 2014)
TI - An Integrated Approach for Efficient Analysis of Facial Expressions
SN - 978-989-758-046-8
AU - Ghayoumi M.
AU - Bansal A.
PY - 2014
SP - 211
EP - 219
DO - 10.5220/0005116702110219