Yoon-Seok Choi is a Principle Researcher at Creative Contents Research Division, Electronics and Telecommunications Research Institute, South Korea. His diverse research interests include non photorealistic rendering, real-time rendering, virtual reality, machine learning, evolutionary computation and image analysis. He received his PhD Engineering degree from Seoul National University, Korea in 2008 where he completed his BS and MS degrees in Computer Engineering from Chung-Ang University in 1996 and 1998 respectively.