1. Department of Information Engineering, University of Padova, Padua, Italy
2. Department of Information Engineering and the Department of Physics and Astronomy, University of Padova, Padua, Italy
3. Department of Engineering “Enzo Ferrari,”, University of Modena and Reggio Emilia, Modena, Italy
4. Department of Sciences and Methods for Engineering, University of Modena and Reggio Emilia, Modena, Italy