[1] Cent South Univ, Sch Comp Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Comp Sci & Technol, Changsha 410083, Hunan, Peoples R China
[3] Cent South Univ, Visual Analyt Lab, Changsha 410083, Hunan, Peoples R China
[4] Cent South Univ, Changsha 410083, Hunan, Peoples R China
[5] Shandong Univ, Sch Comp Sci & Technol, Jinan 250100, Peoples R China
[6] Zhejiang Univ, State Key Lab CAD&CG, Hangzhou 310027, Peoples R China
[7] Graz Univ Technol, Fac Comp Sci & Biomed Engn, Inst Comp Graph & Knowledge Visualizat, A-8070 Graz, Styria, Austria