1. Department of Digital Systems, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland
2. Institute of Control and Computation Engineering, University of Zielona Góra, Prof. Z. Szafrana 2, 65-516 Zielona Góra, Poland
3. Department of Graphics, Computer Vision and Digital Systems, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland