1. Faculty of Computer Science and Information TechnologyUniversity of MalayaKuala LumpurMalaysia
2. National Key Laboratory for Novel Software Technology, Nanjing UniversityNanjingPeople's Republic of China
3. Computer Vision and Pattern Recognition Unit, Indian Statistical InstituteKolkataIndia
4. School of Computer Science and Electronic EngineeringUniversity of EssexCO4 3SQColchesterUK