Zhimao Lai received the B.S. degree from Sun Yat-sen University in 2009 and the M.S. degree from South China University of Technology in 2012. He is currently a lecturer at the School of Immigration Management College (Guangzhou), China People's Police University. His research interests include human action recognition, multimedia security, and digital image processing.

Yan Zhang received a PhD degree from Xi'an University of Technology in 2018. She is currently a professor at the School of Immigration Management College, China People's Police University. His research interests include security document technology, digital image processing, and pattern recognition.

Xiubo Liang received an M.S. degree from China University of Political Science and Law in 2006. He is currently a professor at the School of Immigration Management College, China People's Police University. His research interests include abnormal behavior recognition and entry and exit administration.