Funding for this research was provided by:
National Natural Science Foundation of China (61603159)
Natural Science Foundation of Jiangsu Province (BK20160293)
China Postdoctoral Science Foundation (2017M611695)
Jiangsu Province Postdoctoral Science Foundation (1701094B)
Jiangsu Key Laboratory of Image and Video Understanding for Social Safety (Nanjing University of Science and Technology) (30916014107)
Article History
First Online: 8 February 2018