1. Department of Optoelectronics and Communication EngineeringNational Kaohsiung Normal UniversityNo. 62, Shenjhong Road, Yanchao DistrictKaohsiung City82446Taiwan
2. Department of Computer Science and Information EngineeringNational Yunlin University of Science and Technology, 123 University Rd.Section 3DouliouYunlin64002Taiwan