A new color QR code forward compatible with the standard QR code decoder. - Masanori Kikuchi; Masaaki Fujiyoshi; Hitoshi Kiya (ISPACS, 2013)

An Encryption-then-Compression System for JPEG/Motion JPEG Standard. - Kenta Kurihara; Masanori Kikuchi; Shoko Imaizumi; Sayaka Shiota; Hitoshi Kiya (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)