{"created":"2023-05-15T10:01:21.260579+00:00","id":5900,"links":{},"metadata":{"_buckets":{"deposit":"02737ac1-9225-4e6d-817d-b81e6608f417"},"_deposit":{"created_by":5,"id":"5900","owner":"5","owners":[5],"pid":{"revision_id":0,"type":"depid","value":"5900"},"status":"published"},"_oai":{"id":"oai:miyazaki-u.repo.nii.ac.jp:00005900","sets":["73","73:36","73:36:330","73:36:330:329"]},"author_link":["31739","31735","31730","11847","14888","11839"],"item_10002_alternative_title_1":{"attribute_name":"その他（別言語等）のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"ニンゲン ノ シカク ホカン ノウリョク オ モチイ タ モジレツCAPTCHA ノ テイアン -ソクメン ケイジョウ カラノ リッタイ モジ ノ スイテイ-","subitem_alternative_title_language":"ja-Kana"}]},"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-07","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"255","bibliographicPageStart":"251","bibliographicVolumeNumber":"48","bibliographic_titles":[{"bibliographic_title":"宮崎大学工学部紀要","bibliographic_titleLang":"ja"},{"bibliographic_title":"Memoirs of Faculty of Engineering, University of Miyazaki","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Recently, a program called CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) has been introduced in many web sites because it prevents misconduct by automatic programs called bots. CAPTCHA distinguishes bots from legitimate human users by requiring some questions that are easy for human users to solve but difficult for bots. However, with the development of various technologies such as OCR, object recognition, machine learning, bots come to be able to solve CAPTCHAs. In order to outcome such troublesome bots, more sophisticated CAPTCHA is desired. In this paper, we propose a new CAPTCHA scheme that uses amodal completion. Amodal completion is a visual supplement function that complements the missing part in the brain and recognizes the whole image when a part of the object is hidden or can not be seen. In the proposed method, characters are stereoscopically rendered. We set the color of the front part and the back part of the three-dimensional characters to the same color (black) as the color used in the background of CAPTCHA. By Amodal completion, we can correctly recognize characters from only the shape of the side part of the three-dimensional characters. But it is hard for bots to recognize the characters. We carried out several experiments to confirm that the proposed CAPTCHA scheme has enough resistance against bots attacks using OCR and object recognition. Other experiments were also carried out to evaluate the usability of the proposed CAPTCHA scheme. To evaluate the usability, we used system usability scheme (SUS). The results of the experiments showed that the proposed CAPTCHA scheme is usable and has enough resistance against bots attacks.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宮崎大学工学部","subitem_publisher_language":"ja"},{"subitem_publisher":"Faculty of Engineering, University of Miyazaki","subitem_publisher_language":"en"}]},"item_10002_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA00732558","subitem_source_identifier_type":"NCID"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"05404924","subitem_source_identifier_type":"ISSN"}]},"item_10002_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"藤, 竜成","creatorNameLang":"ja"},{"creatorName":"フジ, リュウセイ","creatorNameLang":"ja-Kana"},{"creatorName":"Fuji, Ryusei","creatorNameLang":"en"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"星野, 理彦","creatorNameLang":"ja"},{"creatorName":"ホシノ, マサヒコ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Yamaba, Hisaaki","creatorNameLang":"en"},{"creatorName":"山場, 久昭","creatorNameLang":"ja"},{"creatorName":"ヤマバ, ヒサアキ","creatorNameLang":"ja-Kana"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{},{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Aburada, Kentaro","creatorNameLang":"en"},{"creatorName":"油田, 健太郎","creatorNameLang":"ja"},{"creatorName":"アブラダ, ケンタロウ","creatorNameLang":"ja-Kana"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{},{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Okazaki, Naonobu","creatorNameLang":"en"},{"creatorName":"岡崎, 直宣","creatorNameLang":"ja"},{"creatorName":"オカザキ, ナオノブ","creatorNameLang":"ja-Kana"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{},{}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifier":"","affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"藤, 竜成","creatorNameLang":"ja"},{"creatorName":"フジ, リュウセイ","creatorNameLang":"ja-Kana"},{"creatorName":"Fuji, Ryusei","creatorNameLang":"en"}],"familyNames":[{},{},{}],"givenNames":[{},{},{}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hoshino, Masahiko","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-06-21"}],"displaytype":"detail","filename":"251-255.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"本文","url":"https://miyazaki-u.repo.nii.ac.jp/record/5900/files/251-255.pdf"},"version_id":"59fd8b21-3f21-4552-8953-c5662363d87c"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"CAPTCHA, bot, amodal compretion, OCR, object recognition","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin 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