1. School of Computer Science and Information Engineering, Chongqing Technology and Business University, Chongqing, China
2. College of Computer Science, Chongqing University, Chongqing, China
3. SAMOVAR, Telecom SudParis, Institut Polytechnique de Paris, Palaiseau, France
4. Chongqing Key Laboratory of Image Cognition, Chongqing University of Posts and Telecommunications, Chongqing, China
5. College of Computer Science, China University of Mining and Technology, Xuzhou, Jiangsu, China