1. State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China School of Stomatology, Sichuan University , Chengdu, China
2. School of Communication and Electronic Engineering, East China Normal University , Shanghai, China
3. School of Computer Science, Sichuan University , Chengdu, China
4. Faculty of Mathematics, Sichuan University , Chengdu, China
5. Department of Oral Medical Imaging, State Key Laboratory of Oral Diseases, National Center for Stomatology, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University , Chengdu, China