[Zhang, Lin-Feng; Liao, Gui-Ping; Yu, Fei; Shen, Yue] Hunan Agr Univ, Sch Comp & Informat Engn, Changsha 410128, Peoples R China.
[Yu, Fei] Nanjing Univ Posts & Telecommun, Provinc Key Lab Image & Proc Image Commun, Nanjing 210003, Peoples R China.
[Yu, Fei] Guangdong Univ Business Studies, Guangdong Province Key Lab Elect, Market Applicat technol, Guangzhou, Peoples R China.
[Liu, Yan] Hunan Univ, Sch Comp & Commun, Changsha 410082, Hunan, Peoples R China.