{"created":"2023-07-27T06:50:25.332533+00:00","id":43191,"links":{},"metadata":{"_buckets":{"deposit":"54addb06-48a7-43cc-b4bf-d53a356b8af6"},"_deposit":{"created_by":18,"id":"43191","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"43191"},"status":"published"},"_oai":{"id":"oai:kanazawa-u.repo.nii.ac.jp:00043191","sets":["4163:4171:4187"]},"author_link":["73443","69591","69588","69589","80437","79987"],"item_4_biblio_info_8":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"199","bibliographicPageStart":"191","bibliographicVolumeNumber":"40","bibliographic_titles":[{"bibliographic_title":"画像電子学会誌"},{"bibliographic_title":"The journal of the Institute of Image Electronics Engineers of Japan","bibliographic_titleLang":"en"}]}]},"item_4_creator_33":{"attribute_name":"著者別表示","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Miyama, Masayuki"}],"nameIdentifiers":[{},{}]},{"creatorNames":[{"creatorName":"Tamura, Kenichi"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Matsuda, Yoshio"}],"nameIdentifiers":[{},{}]}]},"item_4_description_21":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"オプティカルフローは動画像における連続する2フレーム間の画素ごとの動きベクトルである．本稿は輝度変化にロバストで高速なオプティカルフロー推定アルゴリズムを提案する．輝度変化量を差分平均により求め，時間輝度勾配を補正し，ロバスト化を図る．初期値設定法，階層処理法，ウィンドウサイズの最適化により処理の高精度化と高速化を図る．シミュレーションの結果，輝度変化を加えた場合の平均角度誤差は18.65°から4.29°に大きく改善され，ロバスト性を確認した．輝度変化を加えず精度を同程度とした場合のCPU実行時間は従来の15%となり，高速性を確認した．更に本アルゴリズムに基づく専用回路構成を提案し，FPGA実装する．提案回路は従来回路より輝度変化にロバストなうえに，同程度の精度とスループット性能を仮定したとき，動作周波数が20%，面積が45%未満，電力が9%未満に削減される．本回路は実時間画像認識や画像再構成に応用可能である．  An optical flow is defined as a motion vector for each pixel between successive two images in a video. This paper proposes a fast optical flow algorithm with robustness for luminance change. The algorithm includes the luminance change estimation, initial vector decision, fast hierarchical processing, and window size optimization. These methods result in the robustness for the luminance change, accurate flow estimation, and low computational costs. Simulation results show the flow accuracy improves from 18.65° to 4.29°, when giving luminance change. The CPU execution time reduces to 15% compared to the conventional with the same accuracy. In addition, we propose a dedicated architecture based on this algorithm and implement it on an FPGA. Experimental results show the new architecture decreases the operating frequency to 20%, the circuit area to 45%, and the power consumption to 9%. This circuit is applicable to real-time image recognition and image reconstruction. © 2011, The Institute of Image Electronics Engineers of Japan. All rights reserved.","subitem_description_type":"Abstract"}]},"item_4_description_5":{"attribute_name":"提供者所属","attribute_value_mlt":[{"subitem_description":"金沢大学理工研究域電子情報学系    ","subitem_description_type":"Other"}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.24517/00049538","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_17":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"画像電子学会 = The Institute of Image Electronics Engineers of Japan"}]},"item_4_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.11371/iieej.40.191","subitem_relation_type_select":"DOI"}}]},"item_4_relation_28":{"attribute_name":"関連URI","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_text":"https://www.jstage.jst.go.jp/browse/iieej/-char/ja"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.jstage.jst.go.jp/browse/iieej/-char/ja","subitem_relation_type_select":"URI"}},{"subitem_relation_name":[{"subitem_relation_name_text":"https://www.iieej.org/"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.iieej.org/","subitem_relation_type_select":"URI"}}]},"item_4_rights_23":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"Copyright © 画像電子学会 The Institute of Image Electronics Engineers of Japan"}]},"item_4_source_id_11":{"attribute_name":"NCID","attribute_value_mlt":[{"subitem_source_identifier":"AN00041650","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0285-9831","subitem_source_identifier_type":"ISSN"}]},"item_4_version_type_25":{"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":[{"creatorNames":[{"creatorName":"深山, 正幸"}],"nameIdentifiers":[{},{}]},{"creatorNames":[{"creatorName":"田村, 賢一"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"松田, 吉雄"}],"nameIdentifiers":[{},{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-12-22"}],"displaytype":"detail","filename":"TE-PR-MIYAMA-M-191.pdf","filesize":[{"value":"647.1 kB"}],"format":"application/pdf","licensetype":"license_11","mimetype":"application/pdf","url":{"label":"TE-PR-MIYAMA-M-191.pdf","url":"https://kanazawa-u.repo.nii.ac.jp/record/43191/files/TE-PR-MIYAMA-M-191.pdf"},"version_id":"d73af655-e450-4f16-840c-23aa58f1d384"}]},"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":"輝度変化にロバストな高速オプティカルフローアルゴリズムのFPGA実装","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"輝度変化にロバストな高速オプティカルフローアルゴリズムのFPGA実装"},{"subitem_title":"FPGA Implementation of Fast Optical Flow Algorithm with Robustness for Luminance Change","subitem_title_language":"en"}]},"item_type_id":"4","owner":"18","path":["4187"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-12-22"},"publish_date":"2017-12-22","publish_status":"0","recid":"43191","relation_version_is_last":true,"title":["輝度変化にロバストな高速オプティカルフローアルゴリズムのFPGA実装"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-07-27T10:34:52.214971+00:00"}