1. Department of Intelligent Media, Institute of Scientific and Industrial Research (SANKEN), Osaka University, Suita, Japan
2. Faculty of Information Technology, Beijing University of Technology, Beijing, China
3. Yangtze Delta Region Institute (Hu Zhou), University of Electronic Science and Technology of China, Zhejiang, China
4. Pattern Analysis and Machine Intelligence Research Group, Department of Computer and Information Science, University of Macau, Taipa, Macau SAR, China