@article{oai:miyazaki-u.repo.nii.ac.jp:00005682,
 author = {臼崎, 翔太郎 and Usuzaki, Shotaro and 臼﨑, 翔太郎 and 中原, 裕介 and Yamaba, Hisaaki and 山場, 久昭 and Aburada, Kentaro and 油田, 健太郎 and Okazaki, Naonobu and 岡崎, 直宣 and 臼崎, 翔太郎 and Usuzaki, Shotaro and 臼﨑, 翔太郎 and Nakahara, Yusuke},
 journal = {宮崎大学工学部紀要, Memoirs of Faculty of Engineering, University of Miyazaki},
 month = {Jul},
 note = {Currently, the text-based CAPTCHA which makes the user answer the original characters from the distorted those is standardly used. In addition, reCAPTCHA has recently used as image-based CAPTCHA which is easy for humans to understand. However, these standard CAPTCHAs are broken with high success rate because of the progressing of machine learning and image processing technology. Although obstacles that make it impossible to read the machine are necessary, it causes the owing to the success rate of the human decrease. Therefore, the requirement for CAPTCHA is not only more to be difficult for the machine but also to be easy for humans. On the other hand, Color-based CAPTCHA has a high human success rate, but it is likely to be solved mechanically. This CAPTCHA does not add disturbance unlike the conventional ones can be easily solved by humans, however, it has a vulnerable in terms of security. In this paper, we propose a color CAPTCHA that uses color obstruction images has higher tolerance to machines. Due to the influence of color constancy, it is considered that high human success rate can be guaranteed even if there is color obstruction. We evaluated how much color constancy is functioned for color obstruction images, and confirmed that color recognition almost matches as in normal state.},
 pages = {211--214},
 title = {Color CAPTCHAのための色妨害画像に対する色恒常性の成立度合いの検討},
 volume = {47},
 year = {2018},
 yomi = {ウスザキ, ショウタロウ and ナカハラ, ユウスケ and ヤマバ, ヒサアキ and アブラダ, ケンタロウ and オカザキ, ナオノブ and ウスザキ, ショウタロウ}
}