1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
2. Southwest Institute of Electronic Technology, Chengdu, China
3. Department of Electrical and Computer Engineering, Mississippi State University, Starkville, MS, USA
4. Department of Technology of Computers and Communications, Escuela Politecnica, Hyperspectral Computing Laboratory, University of Extremadura, Cáceres, Spain