{"created":"2023-05-15T12:36:08.504497+00:00","id":5345,"links":{},"metadata":{"_buckets":{"deposit":"028cfc32-907d-4ccb-af69-7816a9363e14"},"_deposit":{"created_by":91,"id":"5345","owners":[91],"pid":{"revision_id":0,"type":"depid","value":"5345"},"status":"published"},"_oai":{"id":"oai:nitech.repo.nii.ac.jp:00005345","sets":["31"]},"author_link":["8670","14694","3028","8670","18485","14694","3028"],"item_10001_alternative_title_24":{"attribute_name":"その他（別言語等）のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"コウアッシュク　セイシ　ガゾウ　ノ　コウガシツカ　ニカンスル　ケンキュウ　","subitem_alternative_title_language":"ja-Kana"},{"subitem_alternative_title":"A Study on Improving Image Quality of High Compressed Still Pictures","subitem_alternative_title_language":"en"}]},"item_10001_biblio_info_28":{"attribute_name":"bibliographic_information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2007-07-01","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"7","bibliographicPageEnd":"1681","bibliographicPageStart":"1679","bibliographicVolumeNumber":"J90-A","bibliographic_titles":[{"bibliographic_title":"電子情報通信学会論文誌. D, 情報・システム","bibliographic_titleLang":"ja"}]}]},"item_10001_description_36":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"近年，ディジタル画像を扱う機会が増えている．静止画像や動画像は容量が大きいことから，一般に国際標準規格であるJPEG やMPEG で圧縮される．これらの規格では，変換符号化に離散コサイン変換（DCT）を用いており，圧縮率が高くなるにつれ，ブロックひずみを引き起こす．一方，過去に撮影された画像には高圧縮されたものが数多く存在する．そこで，本研究では逆ウェーブレット変換を用いた高画質化手法を提案する．本手法はDCT係数をウェーブレット係数へ変換し，この係数に応じたフィルタを選択する逆ウェーブレット変換を行うことで係数を復号する．また，しきい値を設定して処理を制御することでエッジを保護し，画質改善を図る．","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_10001_full_name_27":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"8670","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"1000020324478","nameIdentifierScheme":"NRID","nameIdentifierURI":"http://rns.nii.ac.jp/nr/1000020324478"}],"names":[{"name":"Goto, Tomio"}]},{"nameIdentifiers":[{"nameIdentifier":"14694","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Sakurai, Masaru"}]},{"nameIdentifiers":[{"nameIdentifier":"3028","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kitamura, Tadashi"}]}]},"item_10001_publisher_29":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"Institute of Electronics, Information and Communication Engineers","subitem_publisher_language":"en"}]},"item_10001_source_id_30":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1880-4535","subitem_source_identifier_type":"ISSN"}]},"item_10001_source_id_32":{"attribute_name":"item_10001_source_id_32","attribute_value_mlt":[{"subitem_source_identifier":"AA12099634","subitem_source_identifier_type":"NCID"}]},"item_10001_version_type_33":{"attribute_name":"出版タイプ","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":"後藤, 富朗"},{"creatorName":"ゴトウ, トミオ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"8670","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"1000020324478","nameIdentifierScheme":"NRID","nameIdentifierURI":"http://rns.nii.ac.jp/nr/1000020324478"}]},{"creatorNames":[{"creatorName":"山崎, 達也"}],"nameIdentifiers":[{"nameIdentifier":"18485","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"櫻井, 優"}],"nameIdentifiers":[{"nameIdentifier":"14694","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"北村, 正"}],"nameIdentifiers":[{"nameIdentifier":"3028","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":"2017-01-25"}],"displaytype":"detail","filename":"J90-A_1679.pdf","filesize":[{"value":"207.1 kB"}],"format":"application/pdf","license_note":"Copyright(c)2007 IEICE　http://search.ieice.org/index.html","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"本文_fulltext","url":"https://nitech.repo.nii.ac.jp/record/5345/files/J90-A_1679.pdf"},"version_id":"2ed9fb33-8c70-4904-a6d2-f6176e9a33f8"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"item_resource_type","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"高圧縮静止画像の高画質化に関する研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"高圧縮静止画像の高画質化に関する研究","subitem_title_language":"ja"}]},"item_type_id":"10001","owner":"91","path":["31"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2013-06-25"},"publish_date":"2013-06-25","publish_status":"0","recid":"5345","relation_version_is_last":true,"title":["高圧縮静止画像の高画質化に関する研究"],"weko_creator_id":"91","weko_shared_id":-1},"updated":"2025-03-21T01:23:49.979183+00:00"}