Tzung-Pei Hong , Cho-Han Lee and Shyue-Liang Wang Department of Computer Science and Information Engineering Department of Electrical Engineering Department of Information Management National University of Kaohsiung, Kaohsiung, 811, Taiwan Department of Computer Science and Engineering National Sun Yat-sen University, Kaohsiung, 804, Taiwan tphong@nuk.edu.tw, prescott2005@hotmail.com, slwang@nu...