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Shirai Keiichiro  白井 啓一郎

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SHIRAI Keiichiro  白井 啓一郎

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Researcher Number 00447723
Other IDs
Affiliation (Current) 2025: 信州大学, 学術研究院工学系, 准教授
Affiliation (based on the past Project Information) *help 2017 – 2023: 信州大学, 学術研究院工学系, 准教授
2016: 信州大学, 学術研究院工学系, 助教
2013 – 2015: 信州大学, 工学部, 助教
2009 – 2011: 信州大学, 工学部, 助教
Review Section/Research Field
Principal Investigator
Basic Section 21030:Measurement engineering-related / Basic Section 61010:Perceptual information processing-related
Except Principal Investigator
Basic Section 61010:Perceptual information processing-related / Medium-sized Section 3:History, archaeology, museology, and related fields / Japanese history / Perception information processing/Intelligent robotics / Fundamental theory of informatics
Keywords
Principal Investigator
スペクトル分離 / パタン分離 / 画像分離 / スペクトル解析 / パタン解析 / ピーク解析 / 自己相関 / 局所領域 / 画像処理 / 高速化 … More / 摂動論 / テンソル分解 / カラーライン特徴 / スパースモデリング / カラー画像処理 / 縮退処理 / 特異値分解 … More
Except Principal Investigator
漢字 / データベース / 出土文字資料 / 木簡 / ハッシング / アダマール系列 / クロスモーダル検索 / Perfect-code / 画像検索 / Quasi-Perfect-code / Perfect Code / 四元数 / 複素アダマール / クロスモーダル / Perfect-Code / アダマール行列 / バイナリハッシング / 律令制 / 平城宮・京 / 文字文化 / 東アジア / 平城京 / 平城宮 / 木簡学 / 削屑 / 墨書土器 / 古代史 / 日本史 / i字形 / 史料研究 / 異体字 / 文字認識 / 日本古代史 / OCR / 文書画像処理 / 数式認識 / パターン認識 / 情報検索 / 木パターン照合問題 / XPath / XML検索 / 拡張疑似木パターン照合問題 / XML / ビット並列アルゴリズム / 文字列パターン照合 / 木パターン照合 / 検索 / ビット並列 / 木パターン / パターン照合 / アルゴリズム Less
  • Research Projects

    (7 results)
  • Research Products

    (24 results)
  • Co-Researchers

    (36 People)
  •  画像中のパタンノイズ分離法と周波数スペクトルを用いたパタン成分の特徴づけ法の開発Principal Investigator

    • Principal Investigator
      白井 啓一郎
    • Project Period (FY)
      2022 – 2024
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 21030:Measurement engineering-related
    • Research Institution
      Shinshu University
  •  Application of Perfect-code to hashing and mathematical analysis

    • Principal Investigator
      Koutaki Gou
    • Project Period (FY)
      2019 – 2021
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Review Section
      Basic Section 61010:Perceptual information processing-related
    • Research Institution
      Kumamoto University
  •  Development of high-efficiency calculation method for solving inverse problem and singular value decomposition for each local area in image restoration processingPrincipal Investigator

    • Principal Investigator
      Shirai Keiichiro
    • Project Period (FY)
      2018 – 2021
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 61010:Perceptual information processing-related
    • Research Institution
      Shinshu University
  •  Conversion of Wooden Documents Recovered from the Nara Palace and Capital and Their Historic Context into a Global Resource

    • Principal Investigator
      WATANABE AKIHIRO
    • Project Period (FY)
      2018 – 2021
    • Research Category
      Grant-in-Aid for Scientific Research (A)
    • Review Section
      Medium-sized Section 3:History, archaeology, museology, and related fields
    • Research Institution
      Nara National Research Institute for Cultural Properties
  •  Central information management and knowledge compilation for the development as a resource of wooden tablets and other excavated documentary materials

    • Principal Investigator
      WATANABE AKIHIRO
    • Project Period (FY)
      2013 – 2017
    • Research Category
      Grant-in-Aid for Scientific Research (S)
    • Research Field
      Japanese history
    • Research Institution
      Nara National Research Institute for Cultural Properties
  •  Design of fast tree pattern matching algorithms using bit-parallelism on strings

    • Principal Investigator
      YAMAMOTO Hiroaki
    • Project Period (FY)
      2009 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Fundamental theory of informatics
    • Research Institution
      Shinshu University
  •  Embedding a Mathematical OCR Module into OCRopus

    • Principal Investigator
      OKAMOTO Masayuki
    • Project Period (FY)
      2009 – 2011
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Perception information processing/Intelligent robotics
    • Research Institution
      Shinshu University

All 2023 2022 2021 2019 2018 2016 2014 2013 2011 Other

All Journal Article Presentation

  • [Journal Article] Pixel-wise parallel calculation for depth from focus with adaptive focus measure2022

    • Author(s)
      Yoichi Matsubara, Keiichiro Shirai, Yuya Ito, Kiyoshi Tanaka
    • Journal Title

      Multidimensional Systems and Signal Processing

      Volume: 33 Issue: 1 Pages: 121-142

    • DOI

      10.1007/s11045-021-00794-9

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Journal Article] Efficient pixel-wise SVD required for image processing using the color line feature2021

    • Author(s)
      Keiichiro Shirai, Yuya Ito, Hidetoshi Miyao, Minoru Maruyama
    • Journal Title

      IEEE Access

      Volume: 9 Pages: 79449-79460

    • DOI

      10.1109/access.2021.3083895

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Journal Article] 古文書デジタルアーカイブに対する横断的字形検索サービスの試作2014

    • Author(s)
      耒代誠仁, 白井啓一郎, 馬場基, 渡辺晃宏, 井上聡, 久留島典子, 中川正樹
    • Journal Title

      情報処理学会 人文科学とコンピュータシンポジウム「じんもんこん2014」論文集

      Volume: 2014-3 Pages: 87-92

    • NAID

      170000088041

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Journal Article] 古文書字形検索サーバの設計と試作2014

    • Author(s)
      耒代誠仁, 白井啓一郎, 馬場基, 渡辺晃宏, 井上聡, 久留島典子, 中川正樹
    • Journal Title

      日本情報考古学会講演論文集

      Volume: 2014-13 Pages: 75-77

    • NAID

      40020649208

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Journal Article] 古代木簡に対する平滑化処理の適用および古代木簡解読支援システムのアップデート2013

    • Author(s)
      耒代誠仁, 白井啓一郎, 遠藤友樹, 中川正樹, 馬場基, 渡辺晃宏, 井上聡, 久留島典子
    • Journal Title

      情報処理学会 人文科学とコンピュータシンポジウム「じんもんこん2013」論文集

      Volume: 2013-4 Pages: 65-70

    • NAID

      170000079277

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Journal Article] Image processing and shape repairing for historical character pattern retrieval.2013

    • Author(s)
      Akihito Kitadai, Keiichi Shirai, Satoshi Inoue, Noriko Kurushima, Hajime Baba, Akihiro Watanabe and Masaki Nakagawa
    • Journal Title

      Proc. 16th Biennial Conference of the International Graphonomics Society.

      Volume: 1 Pages: 58-61

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Journal Article] Character Shape Restoration of Binarized Historical Documents by Smoothing via Geodesic Morphology2013

    • Author(s)
      K. Shirai, Y. Endo, A. Kitadai, S. Inoue, N. Kurushima, H. Baba, A. Watanabe, M. Nakagawa.
    • Journal Title

      Proc. 12th International Conference on Document Analysis and Recognition

      Volume: 1 Pages: 1317-1321

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Presentation] 画像からのパタンノイズ分離のための最小パタンサイズの検出方法2023

    • Author(s)
      中川 諒太朗, 白井 啓一郎
    • Organizer
      電子情報通信学会 信越支部大会
    • Data Source
      KAKENHI-PROJECT-22K04123
  • [Presentation] 画像の画素ごとの特異値分解における初期値伝播法の検討2019

    • Author(s)
      伊藤 勇弥,白井 啓一郎,宮尾 秀俊,丸山 稔
    • Organizer
      電子情報通信学会 信越支部大会
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Presentation] 画像の局所領域ごとの特異値分解における初期値の伝播法の検討2019

    • Author(s)
      伊藤 勇弥,白井 啓一郎,宮尾 秀俊,丸山 稔
    • Organizer
      電子情報通信学会 信号処理研究専門委員会 信号処理シンポジウム
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Presentation] 木簡画像データベース用の単色・カラー画像の判別法および木簡領域の検出法の検討2018

    • Author(s)
      岡谷陽平,白井啓一郎,宮尾秀俊,丸山稔
    • Organizer
      画像センシング技術研究会画像センシングシンポジウム(SSII)
    • Data Source
      KAKENHI-PROJECT-18H03597
  • [Presentation] 複数の色や成分を扱う画像処理における画素ごとの特異値分解の計算効率化2018

    • Author(s)
      伊藤 勇弥, 白井 啓一郎, 宮尾 秀俊, 丸山 稔
    • Organizer
      電子情報通信学会 信号処理シンポジウム
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Presentation] 木簡画像に対するSVMを用いた背景領域の検出法の検討2018

    • Author(s)
      岡谷陽平,白井啓一郎,宮尾秀俊,丸山稔
    • Organizer
      電子情報通信学会信越支部大会
    • Data Source
      KAKENHI-PROJECT-18H03597
  • [Presentation] 複数の色や成分を扱う画像処理における画素ごとの特異値分解の計算効率化の検討2018

    • Author(s)
      伊藤 勇弥, 白井 啓一郎, 宮尾 秀俊, 丸山 稔
    • Organizer
      電子情報通信学会 回路とシステムワークショップ
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Presentation] カラーライン特徴を用いた画像処理における画素ごとの特異値分解の計算効率化の検討2018

    • Author(s)
      伊藤 勇弥, 白井 啓一郎, 宮尾 秀俊, 丸山 稔
    • Organizer
      電子情報通信学会 信越支部大会
    • Data Source
      KAKENHI-PROJECT-18K11351
  • [Presentation] RGB色成分の線形和による木簡画像からの墨文字の抽出法2016

    • Author(s)
      杉本拓也, 藤森和博, 白井啓一郎, 宮尾秀俊, 丸山稔
    • Organizer
      レーザ・レーダ研究会・レーザセンシングシンポジウム2016年9月9日
    • Place of Presentation
      長野県野沢温泉スパアリーナコンベンションホール
    • Year and Date
      2016-09-09
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Presentation] Embedding a mathematical OCR module into OCRopus2011

    • Author(s)
      S.Yamazaki, F.Furukori, Q.Zhao, K.Shirai, M.Okamoto
    • Organizer
      IAPR Inter.Conf.on Document Analysis and Recognition (ICDAR)
    • Place of Presentation
      北京,中国
    • Year and Date
      2011-09-20
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] OCRソフトOCRopusへの数式認識モジュールの組込みの検討2011

    • Author(s)
      山崎、古郡、趙、白井、岡本
    • Organizer
      信学技報PRMU2010-267, vo1.110, pp.177-182
    • Place of Presentation
      産総研(つくば)
    • Year and Date
      2011-03-12
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] Embedding a mathematical OCR module into OCRopus2011

    • Author(s)
      S. Yamazaki, F. Furukori, Q. Zhao, K. Shirai, M. Okamoto
    • Organizer
      Document Analysis and Recognition
    • Place of Presentation
      Proc of IAPR Inter
    • Year and Date
      2011-09-19
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] 合焦位置を起点とした文字列抽出の一検討2011

    • Author(s)
      王、馬、白井、岡本
    • Organizer
      信学技報PRMU2010-286, vol.110, pp.287-292
    • Place of Presentation
      産総研(つくば)
    • Year and Date
      2011-03-12
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] OCRソフトOCRopusへの数式認識モジュールの組込みの検討2011

    • Author(s)
      山崎慎平,古郡史啓,趙勤政,白井啓一郎,岡本正行
    • Organizer
      信学技報PRMU2010-267
    • Year and Date
      2011-03-11
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] 合焦位置を起点とした文字列抽出の一検討2011

    • Author(s)
      王済凱,馬国峰,白井啓一郎,岡本正行
    • Organizer
      信学技報PRMU2010-286
    • Year and Date
      2011-03-11
    • Data Source
      KAKENHI-PROJECT-21500163
  • [Presentation] Character shape restoration of binarized historical documents by smoothing via geodesic morphology

    • Author(s)
      K. Shirai, Y. Endo, A. Kitadai, S. Inoue, N. Kurushima, H. Baba, A. Watanabe, M. Nakagawa
    • Organizer
      Character shape restoration of binarized historical documents by smoothing via geodesic morphology
    • Place of Presentation
      アメリカ ワシントン、オムニホテル
    • Data Source
      KAKENHI-PROJECT-25220401
  • [Presentation] Image processing and shape repairing for historical character pattern retrieval

    • Author(s)
      A. Kitadai, K. Shirai, S. Inoue, N. Kurushima, H. Baba, A. Watanabe, M. Nakagawa
    • Organizer
      Proc. 16th International Graphonomics Society Conference(IGS2014)
    • Place of Presentation
      日本 奈良 東大寺総合文化センター
    • Data Source
      KAKENHI-PROJECT-25220401
  • 1.  OKAMOTO Masayuki (50109196)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 6 results
  • 2.  WATANABE AKIHIRO (30212319)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 3.  INOUE SATOSHI (20302656)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 7 results
  • 4.  TAKATA YUICHI (50708576)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 5.  中川 正樹 (10126295)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 7 results
  • 6.  耒代 誠仁 (00401456)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 7 results
  • 7.  馬場 基 (70332195)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 7 results
  • 8.  山本 崇 (00359449)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 9.  小口 雅史 (00177198)
    # of Collaborated Projects: 2 results
    # of Collaborated Products: 0 results
  • 10.  YAMAMOTO Hiroaki (10182643)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 11.  MIYAZAKI Takashi (10141889)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 12.  SHIBAYAMA MAMORU (10162645)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 13.  OIKAWA AKIHUMI (30091888)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 14.  KUWATA KUNIYA (50568764)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 15.  KOUDUMA YOUSEI (80234699)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 16.  YOSHIKAWA SATOSHI (60321626)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 17.  YAMADA SYOUJI (20248751)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 18.  Koutaki Gou (20582935)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 19.  笹原 宏之 (80269505)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 20.  森本 晋 (40220082)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 21.  久留島 典子 (70143534)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 7 results
  • 22.  山口 英男 (40182456)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 23.  高田 智和 (90415612)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 24.  朱 碧蘭 (50466918)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 25.  大山 航 (10324550)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 26.  井上 幸 (30549241)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 7 results
  • 27.  金田 明大 (20290934)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 28.  北村 優季 (20177869)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 29.  李 成市 (30242374)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 30.  角谷 常子 (00280032)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 31.  前川 歩 (60711984)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 32.  鈴木 智大 (60534691)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 33.  京地 清介 (70634616)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 34.  松井 勇佑 (80780676)
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 35.  YAMAMOTO YOSHITAKA
    # of Collaborated Projects: 1 results
    # of Collaborated Products: 0 results
  • 36.  渡邉 晃宏
    # of Collaborated Projects: 0 results
    # of Collaborated Products: 7 results

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