1. College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou, China
2. College of Information Science and Technology, Zhejiang Shuren University, Hangzhou, China
3. Zhejiang-Netherlands Joint Laboratory for Digital Diagnosis and Treatment of Oral Diseases, Zhejiang Shuren University, Hangzhou, China
4. Anfino Feifeng (Anji) Communication Parts Co., Ltd, Huzhou, China