Measurement of Reading Characteristics of Multiplexed Image in QR Code. - Damri Samretwit; Toshihiko Wakahara (INCoS, 2011)

A New Research Support System. - Toshihiko Wakahara; Noriyasu Yamamoto; Natthaphong Udomkarn; Damri Samretwit; Wei-Yong Zhao (INCoS, 2011)

A Study on the Reading Characteristics of Colored 2-Dimensional Code. - Toshihiko Wakahara; Damri Samretwit; Noriyasu Yamamoto (NBiS, 2012)

Design and Characteristics of Two-Dimensional Color Code Editor with Dotted Images. - Toshihiko Wakahara; Damri Samretwit; Toshitaka Maki; Noriyasu Yamamoto (ITCS, 2013)