1. Multimedia signal processing (Image and video compression)
2. Information organization and retrieval (image, video and text search engines)
3. Machine learning and statistical pattern recognition

Seminarium Coordinator, Umeå University, Sweden, February 2005 - June 2005. Series of lectures on state-of-the-art topics for the Ph.D. candidate students of the Digital Medial Lab.

Course Instructor, Umeå University, Sweden, November 2004 - February 2005. Post-graduate level course for the Master of Science in Media Signal Processing. Responsible for lectures, exams, project assignments, and grading.

Seminarium Coordinator, Umeå University, Sweden, September 2004 - December 2004. Series of lectures on state-of-the-art topics for the Ph.D. candidate students of the Digital Medial Lab.

Course Instructor, Umeå University, Sweden, January 2003 - June 2003. Post-graduate level course for the Ph.D. candidate students of the Digital Medial Lab. Responsible for lectures, exams and grading.

Course Instructor, Aristotle University, Greece, January 2001 - June 2001. Under-graduate level course for students of the compute software department in the Aristotle University of Thessaloniki, Greece. Responsible for lectures, exams, task assignments and grades. Topic:Digital signal processing.

• Wawo: a search engine for facial similarities, 2007 - 2008.
• AudioDigger: an experimental search engine for content based audio retrieval (CBAR), 2006 - 2007.
• ImDigger: an experimental system for research on content-based image retrieval (CBIR), 2006 - 2007.
• Web document pre-fetching evaluation suite, MUHCI project, 2005.
• Natural language request analysis component, HYPERGEO project, 2003.