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Elucidation of human visual characteristics in HDR (High Dynamic Range) environments and its engineering applications

Research Project

Project/Area Number 20K11920
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 61020:Human interface and interaction-related
Research InstitutionInternational College of Technology, Kanazawa (2021-2022)
Kagoshima University (2020)

Principal Investigator

Ohtsuka Sakuichi  国際高等専門学校, 国際理工学科, 教授 (90452929)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords概日リズム / HDR / ハイダイナミックレンジ / 階調圧縮 / 大局的処理 / グローバルトーンマッピング / 網膜 / 視覚野 / 視覚 / サーカディアンリズム / 概日周期 / 個人差 / グローバル / トーンマッピング / ディスプレイ / SDR
Outline of Research at the Start

近年、ハイダイナミックレンジ(HDR)技術に代表される現実の視環境を再現するための撮像・表示技術の進歩は目覚ましい。室内のみならずスマートフォン等で屋外においても手軽にHDR技術の恩恵を享受するには、様々な環境における人間の視覚特性を調査検討し、簡単な変換により標準ダイナミックレンジ(SDR)画像に変換する技術の確立が急務である。本研究では、まず、人間の視覚に存在する標準的な知覚表象(NPVと略す)の存在を仮定し、その心理学的検証を行う。また、この結果を活かして簡便で高性能なHDR・SDR変換技術の確立と様々な工学的応用を検討する。

Outline of Final Research Achievements

In recent years, electronic displays have been used extensively in outdoor high dynamic range (HDR) environments due to the explosive spread of mobile devices. Therefore, it is necessary to elucidate the previously unexplored characteristics of human tone perception in such environments, and to apply this knowledge to engineering, keeping in mind the diversity of usage environments and differences in the individual characteristics of users.
A hypothesis that human visual system compress a large amount of information in HDR environments in a global and adaptive manner in the retina, etc. (abbreviated as NVP: Normalized Visual Percept) first, and then perform local processing through the visual cortex in brain, is proposed and tested. Experimental results suggest that (1) the hypothesis is generally valid and (2) the essential cause of variation in NVP is not optical factors such as weather or location but is human factors due to individual circadian rhythms.

Academic Significance and Societal Importance of the Research Achievements

学術的意義としては、従来、生理学的分野の定説では、晴天屋外の照明環境の変化が「個人の概日リズムに与える『知覚できない』照度効果」とされてきた。しかし、その定説を覆し、知覚可能な視覚特性の変化であることを明らかにした。これは、幅広い分野で革新的なの研究を創出する可能性を示唆する。
社会的意義としては、様々な工学的応用が考えられる。例えば、HDR用コンテンツの屋外での視聴はもとより、工業用監視カメラの分野においても、入力系のカメラのみをHDR対応に変更することで、監視の効率や正確性が格段に向上すると期待される。さらに、コロナ禍下で普及した国際遠隔会議等での視覚的な時差調整への応用も期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 2020

All Journal Article (7 results) (of which Peer Reviewed: 6 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Next Generation Personalized Display Systems Employing Adaptive Dynamic-Range Compression Techniques Considering Circadian Rhythm and Personal Behaviors2022

    • Author(s)
      Ohtsuka Sakuichi、Iwaida Saki、Orita Yuichiro、Hira Shoko、Kashima Masayuki
    • Journal Title

      Proceedings of the International Display Workshops

      Volume: 30 Pages: 633

    • DOI

      10.36463/idw.2022.0633

    • ISSN
      1883-2490
    • Year and Date
      2022-12-14
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 68‐3: Importance of Individual Adaptation in Visually Fidelitous Dynamic‐Range Compression from HDR to SDR Images2022

    • Author(s)
      Iwaida Saki、Orita Yuichiro、Hira Shoko、Kashima Masayuki、Ohtsuka Sakuichi
    • Journal Title

      SID Symposium Digest of Technical Papers

      Volume: 53 Issue: 1 Pages: 914-917

    • DOI

      10.1002/sdtp.15643

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Importance of Individual Adaptation in Visually Fidelitous Dynamic-Range Compression from HDR to SDR Images2022

    • Author(s)
      Saki Iwaida, Yuichiro Orita, Shoko Hira, Masayuki Kashima, Sakuichi Ohtsuka
    • Journal Title

      SID 2022 DIGEST

      Volume: 53 Pages: 914-917

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] HDR画像の視覚的階調圧縮に関する検討 ~ 大域的階調特性変化に伴う主観的撮影時刻に関する個人依存性 ~2021

    • Author(s)
      折田 裕一朗,東 玄太,比良 祥子,鹿嶋 雅之,大塚 作一
    • Journal Title

      電子情報通信学会技術報告(HIP)

      Volume: 121(211) Pages: 87-92

    • Related Report
      2021 Research-status Report
  • [Journal Article] Tool to aid view of PC display for USN observers: magnifier with KUI2021

    • Author(s)
      Hira Shoko、Hino Shogo、Ohtsuka Sakuichi
    • Journal Title

      Proc. SPIE 11766, International Workshop on Advanced Imaging Technology (IWAIT) 2021

      Volume: 11766 Pages: 82-82

    • DOI

      10.1117/12.2590976

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 80‐3: Immanent Dichromaticity in Trichromatic Observer: 2nd Coordinate in MDS Analyses of R‐G Neutral‐ and Y‐B Only Changed‐Stimuli Reflects Chromatic Saliency2020

    • Author(s)
      Hira Shoko、Endo Rei、Mochihara Kanta、Ohkoba Minoru、Ishikawa Tomoharu、Ayama Miyoshi、Ohtsuka Sakuichi
    • Journal Title

      SID Symposium Digest of Technical Papers

      Volume: 51 Issue: 1 Pages: 1198-1201

    • DOI

      10.1002/sdtp.14093

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 80‐4: Human Visual System Uses Just a Few Transfer Functions Depending on Various Environments to Realize Normalized Visual Percept: Investigation Using Real Photographic Images2020

    • Author(s)
      Ohtsuka Sakuichi、Nakamura Masahiro、Orita Yuichiro、Iwaida Saki、Hira Shoko
    • Journal Title

      SID Symposium Digest of Technical Papers

      Volume: 51 Issue: 1 Pages: 1202-1205

    • DOI

      10.1002/sdtp.14094

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 人間の視覚特性に適合した自然な画像再生トーンカーブの導出 -サーカディアンリズムと個人依存性を考慮した画質評価-2022

    • Author(s)
      岩井田 早紀, 折田 裕一朗, 比良 祥子, 鹿嶋 雅之, 大塚 作一
    • Organizer
      2022 年度 第 50 回 画像電子学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Next Generation Personalized Display Systems Employing Adaptive Dynamic-Range Compression Techniques Considering Circadian Rhythm and Personal Behaviors2022

    • Author(s)
      Ohtsuka Sakuichi、Iwaida Saki、Orita Yuichiro、Hira Shoko、Kashima Masayuki
    • Organizer
      IDW2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Importance of Individual Adaptation in Visually Fidelitous Dynamic-Range Compression from HDR to SDR Images2022

    • Author(s)
      Saki Iwaida (コロナ禍規制のため Sakuichi Ohtsuka 代理発表)
    • Organizer
      SID International Symposium 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] HDR画像の視覚的階調圧縮に関する検討 ~ 大域的階調特性変化に伴う主観的撮影時刻に関する個人依存性 ~2021

    • Author(s)
      折田 裕一朗
    • Organizer
      電子情報通信学会 HIP研究会(10月)
    • Related Report
      2021 Research-status Report
  • [Presentation] Tool to aid view of PC display for USN observers: magnifier with KUI2021

    • Author(s)
      Hira Shoko、Hino Shogo、Ohtsuka Sakuichi
    • Organizer
      International Workshop on Advanced Imaging Technology (IWAIT) 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 80‐3: Immanent Dichromaticity in Trichromatic Observer: 2nd Coordinate in MDS Analyses of R‐G Neutral‐ and Y‐B Only Changed‐Stimuli Reflects Chromatic Saliency2020

    • Author(s)
      Hira Shoko、Endo Rei、Mochihara Kanta、Ohkoba Minoru、Ishikawa Tomoharu、Ayama Miyoshi、Ohtsuka Sakuichi
    • Organizer
      SID Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 80‐4: Human Visual System Uses Just a Few Transfer Functions Depending on Various Environments to Realize Normalized Visual Percept: Investigation Using Real Photographic Images2020

    • Author(s)
      Ohtsuka Sakuichi、Nakamura Masahiro、Orita Yuichiro、Iwaida Saki、Hira Shoko
    • Organizer
      SID Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 画像調整システム、画像調整方法及びプログラム2021

    • Inventor(s)
      大塚 作一
    • Industrial Property Rights Holder
      国立大学法人鹿児島大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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