{"created":"2024-04-18T06:37:38.363565+00:00","id":2002159,"links":{},"metadata":{"_buckets":{"deposit":"329b7918-a3c1-4d21-afad-472b6bdf0f11"},"_deposit":{"created_by":8,"id":"2002159","owner":"8","owners":[8],"pid":{"revision_id":0,"type":"depid","value":"2002159"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02002159","sets":["15"]},"author_link":["751","366"],"control_number":"2002159","item_10001_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2023-04-12","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"8","bibliographicPageStart":"2039","bibliographicVolumeNumber":"15","bibliographic_titles":[{"bibliographic_title":"Remote Sensing","bibliographic_titleLang":"en"}]}]},"item_10001_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Extensive floating macroalgae have drifted from the East China Sea to Japan’s offshore area, and field observation cannot sufficiently grasp their extensive spatial and temporal changes. High-spatial-resolution satellite data, which contain multiple spectral bands, have advanced remote sensing analysis. Several indexes for recognizing vegetation in satellite images, namely, the normalized difference vegetation index (NDVI), normalized difference water index (NDWI), and floating algae index (FAI), are useful for detecting floating macroalgae. Thresholds are defined to separate macroalgae-containing image pixels from other pixels, and adaptive thresholding increases the reliability of image segmentation. This study proposes adaptive thresholding using Sentinel-2 satellite data with a 10 m spatial resolution. We compare the abilities of Otsu’s, exclusion, and standard deviation methods to define the floating macroalgae detection thresholds of NDVI, NDWI, and FAI images. This comparison determines the most advantageous method for the automatic detection of floating macroalgae. Finally, the spatial coverage of floating macroalgae and the reproducible combination needed for the automatic detection of floating macroalgae in Kagoshima, Japan, are examined.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10001_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"MDPI","subitem_publisher_language":"en"}]},"item_10001_relation_14":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.3390/rs15082039","subitem_relation_type_select":"DOI"}}]},"item_10001_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"ja","subitem_relation_name_text":"水産技術研究所　環境・応用部門　沿岸生態システム部 （廿日市）"}],"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"23342066","subitem_relation_type_select":"Local"}}]},"item_10001_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"en","subitem_relation_name_text":"MDPI Open Access Article"}],"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"https://www.mdpi.com/2072-4292/15/8/2039","subitem_relation_type_select":"URI"}}]},"item_10001_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"2072-4292","subitem_source_identifier_type":"EISSN"}]},"item_10001_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":[{"affiliationNames":[{"affiliationName":"Hiroshima University","affiliationNameLang":"en"},{"affiliationName":"広島大学","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Muzhoffar, Dimas Angga Fakhri","creatorNameLang":"en"}]},{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Hiroshima University","affiliationNameLang":"en"},{"affiliationName":"広島大学","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Sakuno, Yuji","creatorNameLang":"en"},{"creatorName":"サクノ, ユウジ","creatorNameLang":"ja"},{"creatorName":"サクノ, ユウジ","creatorNameLang":"ja-Kana"}]},{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"Hiroshima University","affiliationNameLang":"en"},{"affiliationName":"広島大学","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Taniguchi, Naokazu","creatorNameLang":"en"},{"creatorName":"タニグチ, ナオカズ","creatorNameLang":"ja"},{"creatorName":"タニグチ, ナオカズ","creatorNameLang":"ja-Kana"}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Shimabukuro, Hiromori","creatorNameLang":"en"},{"creatorName":"島袋, 寛盛","creatorNameLang":"ja"},{"creatorName":"シマブクロ, ヒロモリ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"Shimabukuro","familyNameLang":"en"},{"familyName":"島袋","familyNameLang":"ja"},{"familyName":"シマブクロ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Hiromori","givenNameLang":"en"},{"givenName":"寛盛","givenNameLang":"ja"},{"givenName":"ヒロモリ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"366","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"00569452","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=00569452"}]},{"creatorAffiliations":[{"affiliationNameIdentifiers":[],"affiliationNames":[{"affiliationName":"","affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Hori, Masakazu","creatorNameLang":"en"},{"creatorName":"堀, 正和","creatorNameLang":"ja"},{"creatorName":"ホリ, マサカズ","creatorNameLang":"ja-Kana"}],"familyNames":[{"familyName":"Hori","familyNameLang":"en"},{"familyName":"堀","familyNameLang":"ja"},{"familyName":"ホリ","familyNameLang":"ja-Kana"}],"givenNames":[{"givenName":"Masakazu","givenNameLang":"en"},{"givenName":"正和","givenNameLang":"ja"},{"givenName":"マサカズ","givenNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"751","nameIdentifierScheme":"WEKO"},{"nameIdentifier":"50443370","nameIdentifierScheme":"e-Rad","nameIdentifierURI":"https://kaken.nii.ac.jp/ja/search/?qm=50443370"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2024-07-03"}],"filename":"Mozhoffer et al. Automatic detection of floating microalgae.pdf","filesize":[{"value":"10.6 MB"}],"format":"application/pdf","mimetype":"application/pdf","url":{"url":"https://fra.repo.nii.ac.jp/record/2002159/files/Mozhoffer et al. Automatic detection of floating microalgae.pdf"},"version_id":"d9def6fb-bb5c-41ca-a843-aa3c4f06850d"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"adaptive thresholding method; floating algae area estimation; Otsu’s method; satellite remote sensing; Sentinel-2 satellite","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"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":"Automatic Detection of Floating Macroalgae via Adaptive Thresholding Using Sentinel-2 Satellite Data with 10 m Spatial Resolution","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Automatic Detection of Floating Macroalgae via Adaptive Thresholding Using Sentinel-2 Satellite Data with 10 m Spatial Resolution","subitem_title_language":"en"}]},"item_type_id":"10001","owner":"8","path":["15"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-04-18"},"publish_date":"2024-04-18","publish_status":"0","recid":"2002159","relation_version_is_last":true,"title":["Automatic Detection of Floating Macroalgae via Adaptive Thresholding Using Sentinel-2 Satellite Data with 10 m Spatial Resolution"],"weko_creator_id":"8","weko_shared_id":-1},"updated":"2025-03-27T08:06:00.337772+00:00"}