Prof. Leonardi's main research interests cover various areas of Digital Signal Processing applications, with an emphasis towards visual communications, multimedia content analysis and multimedia creation. Prof. Leonardi also conducts research on more theoretical issues pertaining models for signal representation and approximation. He often participates to international and multidisciplinary initiatives. He has published more than 200 papers in peer reviewed international journals and in major International Conferences proceedings. Since 1997, he acts also as an evaluator and auditor for the European Union research programmes. Co-founder of a national association supporting education and research in Information and Communication Technologies (GTTI), he has been elected since 2012 as its secretary.