[1] Guangzhou Univ, Sch Comp Sci & Cyber Engn, Guangzhou 510006, Peoples R China
[2] Guangzhou Univ, Dept Stat, Guangzhou 510006, Peoples R China
[3] Southeast Univ, Lab Image Sci & Technol, Key Lab Comp Network & Informat Integrat, Minist Educ, Nanjing 210096, Peoples R China