{"created":"2021-03-01T06:16:59.144393+00:00","id":445,"links":{},"metadata":{"_buckets":{"deposit":"840784fd-2149-4eaf-bb44-3d155f71f3fb"},"_deposit":{"id":"445","owners":[],"pid":{"revision_id":0,"type":"depid","value":"445"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00000445","sets":["30:31","9:10:14"]},"item_2_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"Calibration Method of Visual Parameters for See-Through Head-Mounted Display"}]},"item_2_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1994-09","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"6","bibliographicPageEnd":"918","bibliographicPageStart":"911","bibliographicVolumeNumber":"12","bibliographic_titles":[{"bibliographic_title":"日本ロボット学会誌"}]}]},"item_2_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_2_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"It is expected that See-Through Head-Mounted Display (STHMD), which superimposes the virtual environment generated by computer graphics (CG) on the real world, can vividly execute various simulations and designs by using both of the real and virtual environment around us. In STHMDs, information given as a virtual environment has to exactly match with the real environment, because both environments are visible. This is one of the problems to be solved for practical use. Particularly for matching of locations and size between real and virtual objects, disaccordance is likely to occur between the world coordinate of the real environment where the user of STHMD actually exists and that of the virtual environment described as parameters of CG, which directly causes displacement of locations where virtual objects are superimposed. This must be calibrated so that the virtual environment is superimposed properly. Among causes of such errors, we focused both on systematic errors of visual parameters caused in manufacturing process and differences between actual and supposed location of user's eye on STHMD when in use. The former is required to be calibrated only once after the fabrication of STHMDs, whereas the latter has to be calibrated every time users start using STHMDs. We have proposed calibration methods which are suitable to properties of these causes of errors. In the method, the direct fitting of the virtual cursor drawn in the virtual environment onto targets in the real environment is performed. Then, based on the result of fitting, the least square method identifies values of the visual parameters which minimize differences between locations of virtual cursor in the virtual environment and targets in the real environment. Application of the method to the STHMD which we have made is also reported. The differences between the virtual cursor and targets in the real environment due to systematic errors caused in the manufacturing process were reduced to about 1 [mm] per target, which was less than one-thirtieth of that before the calibration. The differences between the virtual cursor and targets in the real environment due to the location of user's eyes were also reduced about 2 [mm] per target, which was a half of that before the calibration. This result was well enough to prove the effectiveness of the calibration methods.","subitem_description_type":"Abstract"}]},"item_2_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"106537","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Oishi, Takashi"}]},{"nameIdentifiers":[{"nameIdentifier":"106538","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Tachi, Susumu"}]}]},"item_2_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本ロボット学会"}]},"item_2_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00141189","subitem_source_identifier_type":"NCID"}]},"item_2_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"02891824","subitem_source_identifier_type":"ISSN"}]},"item_2_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"548.3","subitem_subject_scheme":"NDC"}]},"item_2_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"東京大学先端科学技術研究センター"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"大石, 峰士"}],"nameIdentifiers":[{"nameIdentifier":"106535","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"舘, 暲"}],"nameIdentifiers":[{"nameIdentifier":"106536","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-26"}],"displaytype":"detail","filename":"1206B133.pdf","filesize":[{"value":"564.0 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"1206B133.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/445/files/1206B133.pdf"},"version_id":"2af4b101-ec8d-4ca9-88e8-5e41a4508e3b"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Tele-Existence","subitem_subject_scheme":"Other"},{"subitem_subject":"Virtual Reality","subitem_subject_scheme":"Other"},{"subitem_subject":"See-Through Head-Mounted Display","subitem_subject_scheme":"Other"},{"subitem_subject":"Calibration of Visual Parameters","subitem_subject_scheme":"Other"},{"subitem_subject":"Non-linear Least Square Method","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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"シースルー型HMDにおける視覚パラメータの較正法","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"シースルー型HMDにおける視覚パラメータの較正法"}]},"item_type_id":"2","owner":"1","path":["31","14"],"pubdate":{"attribute_name":"公開日","attribute_value":"2010-03-12"},"publish_date":"2010-03-12","publish_status":"0","recid":"445","relation_version_is_last":true,"title":["シースルー型HMDにおける視覚パラメータの較正法"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T03:41:19.426692+00:00"}