National Technical University of Athens, Greece
1997- Present: Full Professor of National Technical University of Athens and Director of the Image, Video and Multimedia Systems Lab.
1986-1997: Associate Professor, Assistant Professor and Lecturer of National Technical University of Athens
1987-1988: Visiting Research Scientist, Department of Electrical Engineering and Center for Telecommunications Research, Columbia University
Image and ideo processing, analysis, coding, storage, retrieval, Multimedia Systems, computer graphics and virtual reality, artificial intelligence, neural networks, human computer interaction, medical imaging.