Putra Sumari is currently a associate professor in the School of Computer Science at Universiti Sains Malaysia, Penang, Malaysia. He received his B.Sc computer science (Hons) from Universiti Sains Malaysia, Malaysia in 1994. M.Sc video storage and retrieval from Liverpool University, England in 1997. Ph.D. from Liverpool John Moores Univeristy, England in 2000. His research interests include multimedia tools and applications, multimedia on demand & MPEG technology, data broadcasting, image/video retrieval, image/video compression and image/video watermarking.