He is now a senior researcher in the City University of Hong Kong. His current research interests mainly include pattern recognition, machine learning and data mining. He has authored/co-authored more than 50 papers published at prestigious international journals and conferences, e.g., the IEEE Transactions on Image Processing, the IEEE Transactions on Industrial Informatics, the IEEE Transactions on Knowledge and Data Engineering, the ACM Transactions on Intelligent Systems and Technology, the Pattern Recognition, the Computer Vision and Image Understanding (CVIU), the Information Sciences, Neural Networks, etc. He is a member of the IEEE.