1. Department of Electrical Engineering, National Cheng-Kung University, Tainan, Taiwan, ROC
2. Department of Electronic Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, Taiwan, ROC
3. Graduate Institute of Clinical Medicine, Kaohsiung Medical University, Taiwan, ROC
4. Department of Computer Science and Information Engineering, National Cheng-Kung University, Tainan, Taiwan, ROC
5. Department of Electrical and Computer Engineering, University of Houston, Houston, TX, USA
6. Department of Game and Toy Design, Tung-Fang Design Institute, Kaohsiung City, Taiwan, ROC