Corresponding author.Fu Li was born in 1982. He got his B.S and Ph.D. degrees from Xidian University in 2004 and 2010, respectively. He is a lecturer in School of Electronic Engineering, Xidian University. His research interests are nonlinear signal processing and information fusion. E-mail: fuli @ mail.xidian.edu.cn Guangming Shi was born in 1965. He received the B.S., M.S. and Ph.D. degrees from Xidian University in 1985, 1988 and 2002, respectively. His research interests are intelligent signal and information processing, image compression. E-mail: gmshi@xidian.edu.cn Fei Qi was born in 1977. He got his Ph.D. degree from Tsinghua University in 2007. His research interests are visual tracking and information fusion. E-mail: fred.qi@gmail.com Li Zhang was born in 1968. He is a vice professor in Xidian University. His research interests are image processing and VLSI design. E-mail: zhang 1_1i2 @ mail.xidian.edu.cn