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Multifocal stereoscopic projection mapping for alleviating vergence-accommodation conflict

Research Project

Project/Area Number 18K19817
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 61:Human informatics and related fields
Research InstitutionOsaka University

Principal Investigator

Iwai Daisuke  大阪大学, 基礎工学研究科, 准教授 (90504837)

Co-Investigator(Kenkyū-buntansha) 加嶋 健司  京都大学, 情報学研究科, 准教授 (60401551)
Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsプロジェクションマッピング / 輻輳調節矛盾 / 焦点可変レンズ / 高速プロジェクタ / 拡張現実感
Outline of Final Research Achievements

Stereoscopic projection mapping (PM) enables a user to see a 3D computer-generated (CG) object floating over physical surfaces of arbitrary shapes around us by projected imagery. However, current stereoscopic PM only satisfies binocular cues and is not capable of providing correct focus cues, which causes vergence-accommodation conflict. In this research project, we propose a multifocal approach to mitigate VAC in stereoscopic PM. We attach electrically focus tunable lenses (ETL) to active shutter glasses and apply fast and periodical focal sweep to the ETLs, by which the virtual image of a scene observed through the ETLs moves back and forth in each sweep period. A 3DCG object is projected from a synchronized high-speed projector only when the distance of the virtual image locates at a desired distance. This provides an observer with correct focus cues. We conducted a user study and confirmed that the proposed technique can provide a more correct depth cue than conventional systems.

Academic Significance and Societal Importance of the Research Achievements

立体プロジェクションマッピング (PM) では、身の回りの様々な実物の上に、三次元のコンピュータグラフィクス (CG) を奥行きをともなって表現できることが可能である。一方、輻輳調節矛盾と呼ばれる、人の視覚が利用する奥行き手がかりの不一致により、立体PMが提示するCGの奥行きを観察者が正しく知覚できない、という問題があった。本研究課題では、電気式焦点可変レンズと呼ばれる特殊なレンズをメガネとして用いることでこの問題を解決した。この研究成果は、現実空間に立体的なバーチャルアバターを浮かび上がらせるといった、様々な拡張現実アプリケーションの社会展開を後押しすると考えている。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2020 2019 2018 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Journal Article] 焦点走査眼鏡と同期した時間多重化投影による立体投影の輻輳調節矛盾の軽減2020

    • Author(s)
      木村宙志, 岩井大輔, 佐藤宏介
    • Journal Title

      光アライアンス

      Volume: 31 Pages: 32-36

    • NAID

      40022292989

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Speeded-Up Focus Control of Electrically Tunable Lens by Sparse Optimization2019

    • Author(s)
      Iwai Daisuke、Izawa Hidetoshi、Kashima Kenji、Ueda Tatsuyuki、Sato Kosuke
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 12365-12365

    • DOI

      10.1038/s41598-019-48900-z

    • NAID

      120007089273

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 非平面スクリーンへの立体投影における焦点走査眼鏡による輻輳調節矛盾の軽減2020

    • Author(s)
      木村宙志,岩井大輔,佐藤宏介
    • Organizer
      第25回日本バーチャルリアリティ学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Alleviating Vergence-Accommodation Conflict in Stereoscopic Projection by Time-Multiplexed Projection with Focal Sweep2019

    • Author(s)
      Sorashi Kimura, Tatsuyuki Ueda, Daisuke Iwai, Kosuke Sato
    • Organizer
      IEEE 8th Global Conference on Consumer Electronics (GCCE)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 焦点走査眼鏡と時間多重化投影による立体プロジェクションにおける輻輳調節矛盾の軽減2019

    • Author(s)
      木村宙志, 上田龍幸, 岩井大輔, 佐藤宏介
    • Organizer
      第63回システム制御情報学会研究発表講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 焦点走査眼鏡と同期した時間多重化投影による立体投影の輻輳調節矛盾の軽減2019

    • Author(s)
      木村宙志, 岩井大輔, 佐藤宏介
    • Organizer
      映情学技報
    • Related Report
      2019 Research-status Report
  • [Presentation] 液体可変焦点レンズのスパース最適制御2018

    • Author(s)
      加嶋健司, 岩井大輔
    • Organizer
      第61回自動制御連合講演会
    • Related Report
      2018 Research-status Report
  • [Remarks] http://daisukeiwai.org/en/research/etlopt.html

    • Related Report
      2019 Research-status Report
  • [Remarks] スパース最適化による焦点可変レンズの高速焦点制御

    • URL

      http://daisukeiwai.org/jp/research/etlopt.html

    • Related Report
      2019 Research-status Report

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Published: 2018-07-25   Modified: 2022-01-27  

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