1. Department of Digital Media Technology, Xiamen University, Xiamen, China
2. School of Informatics, Xiamen University, Xiamen, China
3. School of Computer Science, University of Hull, Hull, U.K.
4. School of Informatics, the Key Laboratory of Digital Protection and Intelligent Processing of Intangible Cultural Heritage of Fujian and Taiwan Ministry of Culture and Tourism, and the School of Film, Xiamen University, Xiamen, China
5. School of Film, Xiamen University, Xiamen, China
6. Institute of Automation, CAS Key Laboratory of Molecular Imaging, Chinese Academy of Sciences, Beijing, China