Osamu Watanabe received his B.S., M.S., and Ph.D. degrees from Tokyo Metropolitan University in 1999, 2001, and 2004, respectively. In 2004, He joined the faculty of Takushoku University as a research associate in electronics and computer systems. Since 2021, He has been a Professor in the Department of Electronics and Computer Systems. He is a member of IEEE, ITE, and an Associate Editor for The Journal of ITE. He is also an expert of ISO/IEC/JTC1/SG29/WG1 committee “Joint Photographic Experts Group” (JPEG), where he currently serves as co-chair of ICQ (Image Coding and Quality) subgroup. His areas of research interest are image processing, image coding, and signal processing.