Table of Contents
International Scholarly Research Notices
Volume 2014 (2014), Article ID 547069, 11 pages
http://dx.doi.org/10.1155/2014/547069
Research Article

A Low-Dimensional Radial Silhouette-Based Feature for Fast Human Action Recognition Fusing Multiple Views

1Department of Computer Technology, University of Alicante, P.O. Box 99, 03080 Alicante, Spain
2Faculty of Science, Engineering and Computing, Kingston University, Penrhyn Road, Kingston upon Thames KT1 2EE, UK

Received 30 April 2014; Accepted 6 July 2014; Published 29 October 2014

Academic Editor: Antonios Gasteratos

Copyright © 2014 Alexandros Andre Chaaraoui and Francisco Flórez-Revuelta. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a novel silhouette-based feature for vision-based human action recognition, which relies on the contour of the silhouette and a radial scheme. Its low-dimensionality and ease of extraction result in an outstanding proficiency for real-time scenarios. This feature is used in a learning algorithm that by means of model fusion of multiple camera streams builds a bag of key poses, which serves as a dictionary of known poses and allows converting the training sequences into sequences of key poses. These are used in order to perform action recognition by means of a sequence matching algorithm. Experimentation on three different datasets returns high and stable recognition rates. To the best of our knowledge, this paper presents the highest results so far on the MuHAVi-MAS dataset. Real-time suitability is given, since the method easily performs above video frequency. Therefore, the related requirements that applications as ambient-assisted living services impose are successfully fulfilled.