Stefano Berretti is Associate Professor at the Department of Information Engineering of the University of Firenze. He has been also visiting professor at Institute TELECOM Lille 1, Lille, France, and at Khalifa University, Sharjah, UAE. His research interests have been mainly focussed on content modeling, retrieval, and indexing in image databases. Recent works have addressed 3D object retrieval and partitioning, 3D face recognition, 3D/4D facial expression recognition and action recognition.