1. Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
2. Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Księcia Trojdena 4, 02-109 Warszawa, Poland
3. Computer Engineering Department, Technical University ofŁódź, al. Politechniki 11, 90-924 Łódź, Poland