Nikolaos V. Boulgouris received the Ph.D. degree from the Department of Electrical and Computer Engineering, University of Thessaloniki, Greece, in 2002. From 2001 to 2003 he was a research associate with the Informatics and Telematics Institute in Greece. Since September 2003, he is a Post-doctoral Fellow with the Department of Electrical and Computer Engineering, University of Toronto, Canada. From 1997 to 2003, Dr. Boulgouris participated in several actions and projects funded by the European Union in the areas of image/video communication, multimedia security and content-based indexing and retrieval. Dr. Boulgouris has published more than 40 research papers in international journals and conferences.