1. College of Information Engineering, Huanghuai University, Zhumadian, Henan 463000, China
2. Henan Provincial Key Laboratory of Smart Lighting, Huanghuai University, Zhumadian, Henan 463000, China
3. College of Computer Science and Technology, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
4. College of Computer Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310007, China