Alpesh Ranchordas Helder Araújo Jordi Vitrià VISAPP 2007: Proceedings of the Second International Conference on Computer Vision Theory and Applications, Barcelona, Spain, March 8-11, 2007 - Volume 2 VISAPP (2) INSTICC - Institute for Systems and Technologies of Information, Control and Communication 978-972-8865-74-0 2007 db/conf/visapp/visapp2007-2.html