He received the B.S. degree in Electronics Engineering from Seoul National University in 1975, and the M.S. and Ph.D. degrees in Electrical Engineering from KAIST , in 1977 and 1983, respectively. From 1983 to 1987, he was a member of the faculty at Columbia University, New York, and was engaged in the development of high field magnetic resonance imaging (MRI) system and spherical positron emission tomography (PET) system. He has served as a consultant to Philips Medical Systems in 1985. He joined the Department of Electrical Engineering at KAIST in July 1987, where he is now a Professor. His research interests are digital image processing, video signal processing and its hardware implementation, 3-D visualization, and imaging system development such as MRI and PET. He is a senior member of IEEE, and a member of SNM, SPIE, KITE, KOSOMBE, and KICS.