Krittapat Bannajak
Electhcal Engineering Department, Faculty of Engineering, Chiang Mai University Graduated School, Chiang Mai University Chiang Mai, Thailand
Nipon Theera-Umpon
Electhcal Engineering Department, Faculty of Engineering, Chiang Mai University Graduated School, Chiang Mai University Chiang Mai, Thailand
Sansanee Auephanwiriyakul
Computer Engineering Department, Faculty of Engineering, Chiang Mai University Biomedical Engineering Institute, Chiang Mai University Chiang Mai, Thailand