Effective CAPTCHA with Amodal Completion and Aftereffects by Complementary Colors and Difference of Luminance. - Ryuya Uda; Tomoka Azakami (AINA Workshops, 2016)

Challenge of Deep Learning against CAPTCHA with Amodal Completion and Aftereffects by Colors. - Tomoka Azakami; Chihiro Shibata; Ryuya Uda (NBiS, 2016)

Deep Learning Analysis of Amodal Completion CAPTCHA with Colors and Hidden Positions. - Tomoka Azakami; Ryuya Uda (AINA Workshops, 2017)

Challenge to Impede Deep Learning against CAPTCHA with Ergonomic Design. - Tomoka Azakami; Chihiro Shibata; Ryuya Uda (COMPSAC (1), 2017)

Evaluation of Ergonomically Designed CAPTCHAs using Deep Learning Technology. - Tomoka Azakami; Chihiro Shibata; Ryuya Uda (J. Inf. Process., 2018)