1. STMicroelectronics, ADG Research and Development Power and Discretes, Catania, Italy
2. Department of Electrical, Electronics and Computer Engineering, Pattern Recognition and Computer Vision Laboratory (PeRCeiVe Lab), University of Catania, Catania, Italy
3. Dipartimento di Matematica e Informatica (DMI), Image Processing Laboratory (IP-LAB) Group, University of Catania, Catania, Italy