Affiliation: | 1. Centre for Research and Technology Hellas, Informatics and Telematics Institute, 6th Km Charilaou-Thermi Road, Thermi-Thessaloniki, GR-57001 Thessaloniki, Greece;2. Centre for Vision, Speech and Signal Processing University of Surrey Guildford, GU2 7XH, UK;3. School of Electronic Engineering and Computer Science, Queen Mary University of London, E1 4NS London, UK |