"Firefly capturing method": Motion capturing by monocular camera with large spherical aberration of lens and Hough-transform-based image processing. - Yasuji Seko; Yasuyuki Saguchi; Hiroyuki Hotta; Jun Miyazaki; Hiroyasu Koshimizu (ICPR (4), 2006)

Proposal of recordable pointer: Pointed position measurement by projecting interference concentric circle pattern with a pointing device. - Yasuji Seko; Yoshinori Yamaguchi; Yasuyuki Saguchi; Jun Miyazaki; Hiroyasu Koshimizu (ICPR (4), 2006)