1. College of Computer and Information Technology and Hubei Province Engineering Technology Research Center for Construction Quality Testing Equipments, China Three Gorges University, Yichang, China
2. College of Computer and Information Technology and the Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering, China Three Gorges University, Yichang, Hubei, China
3. College of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China
4. International Research Institute of Disaster Science, Tohoku University, Sendai, Japan