1. Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application, Fujian Normal University,Fuzhou,China,350007
2. School of Electronics and Computer Science, University of Southampton,Southampton,UK,SO17 1BJ
3. College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing,China,210006
4. School of Engineering, Tibet University,Lhasa,China,85000
5. School of Electrical and Electronics Engineering, The University of Manchester,Manchester,UK,M13 9PL