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Compressive Acquisition of Dynamic Light Fields

Research Project

Project/Area Number 18K19810
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 InstitutionNagoya University

Principal Investigator

Takahashi Keita  名古屋大学, 工学研究科, 准教授 (30447437)

Co-Investigator(Kenkyū-buntansha) 長原 一  大阪大学, データビリティフロンティア機構, 教授 (80362648)
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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords光線空間 / 圧縮センシング / 符号化開口法 / 深層学習 / コンピュテーショナルカメラ / 圧縮撮影 / 圧縮撮像
Outline of Final Research Achievements

We investigated the technology of acquiring dynamic light fields of moving objects. This is a challenging problem in terms of the data rate (the amount of data per second), because we need to obtain videos from dozens of different viewpoints simultaneously. To tackle this problem, we adopted an approach of compressive sampling, where the original data was first observed (imaged) in a compressed manner, and then reconstructed via a computational process. We used a coded aperture method for compressing imaging, and jointly optimized the aperture pattens and reconstruction algorithm under the framework of deep learning. We also clarified the imaging and learning method that can handle scene motions successfully. Moreover, we validated our method through experiments using real imaging hardware.

Academic Significance and Societal Importance of the Research Achievements

本研究は、ダイナミックな光線空間の効率的な撮影技術を提案するものである。この技術は、3次元情報の可視化、デプス推定、物体の光学特性の計測など、光線空間の様々な応用において、今後の活用が期待できる。また、従来の研究においても、光線空間の圧縮撮影が議論されているが、被写体が動かないことを想定したものがほとんどであり、被写体の動きへの対応を可能にした本研究の貢献は重要である。さらに、本研究における深層学習を活用した開口パターンの導出手法は、物理的光学系を学習ベースで最適化する枠組みであるディープオプティクスの先端を切り開く研究例と位置付けられ、関連分野に波及効果を与え得るものである。

Report

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

    (18 results)

All 2021 2020 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (13 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (2 results)

  • [Journal Article] [Paper] CFA Handling and Quality Analysis for Compressive Light Field Camera2021

    • Author(s)
      Kohei Sakai, Yasutaka Inagaki, Keita Takahashi, Toshiaki Fujii, Hajime Nagahara
    • Journal Title

      ITE Transactions on Media Technology and Applications

      Volume: 9 Issue: 1 Pages: 25-32

    • DOI

      10.3169/mta.9.25

    • NAID

      130007965629

    • ISSN
      2186-7364
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Binary and Rotational Coded-Aperture Imaging for Dynamic Light Fields2021

    • Author(s)
      Kohei Sakai, Keita Takahashi, Toshiaki Fujii
    • Journal Title

      IEICE Transactions on Information and Systems

      Volume: E104-D

    • NAID

      130008070240

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Acquiring Dynamic Light Fields Through Coded Aperture Camera2020

    • Author(s)
      Sakai Kohei、Takahashi Keita、Fujii Toshiaki、Nagahara Hajime
    • Journal Title

      Springer Lecture Notes in Computer Science (Proc. European Conference on Computer Vision)

      Volume: 12364 Pages: 368-385

    • DOI

      10.1007/978-3-030-58529-7_22

    • ISBN
      9783030585280, 9783030585297
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 符号化開口カメラを用いた光線空間撮影の高フレームレート化2020

    • Author(s)
      坂井 康平, 高橋 桂太, 藤井 俊彰, 長原 一
    • Organizer
      画像の認識・理解シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 符号化開口と焦点変更による光線空間の取得2020

    • Author(s)
      立石 航平, 高橋 桂太, 藤井 俊彰, 長原 一
    • Organizer
      画像の認識・理解シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 回転型符号化開口法による動的光線空間の撮影2020

    • Author(s)
      坂井 康平, 高橋 桂太, 藤井 俊彰
    • Organizer
      画像符号化シンポジウム・映像メディア処理シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 符号化露光法を用いた光線空間の取得2020

    • Author(s)
      立石 航平, 坂井 康平, 高橋 桂太, 藤井 俊彰
    • Organizer
      画像符号化シンポジウム・映像メディア処理シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Light Field Acquisition from Focal Stack via a Deep CNN2019

    • Author(s)
      Yasutaka Inagaki, Keita Takahashi, Toshiaki Fujii
    • Organizer
      International Display Workshop (IDW19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Learning-Based Framework for Capturing Light Fields through a Coded Aperture Camera2019

    • Author(s)
      Yasutaka Inagaki, Keita Takahashi, Toshiaki Fujii, Hajime Nagahara
    • Organizer
      IEEE International Conference on Computational Photography (ICCP) 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Learning to Capture Light Fields through a Coded Aperture Camera2019

    • Author(s)
      Yasutaka Inagaki, Yuto Kobayashi, Keita Takahashi, Toshiaki Fujii, Hajime Nagahara
    • Organizer
      画像の認識・理解シンポジウム(MIRU)2019
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 2値マスクを用いた符号化開口カメラによる動的な光線空間の取得2019

    • Author(s)
      坂井 康平, 稲垣 安隆, 高橋桂太, 藤井 俊彰, 長原一
    • Organizer
      画像符号化シンポジウム・映像メディア処理シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 符号化開口カメラによる動的な光線空間の取得にむけて2019

    • Author(s)
      坂井 康平, 稲垣 安隆, 高橋 桂太, 藤井 俊彰, 長原 一
    • Organizer
      画像の認識・理解シンポジウム(MIRU)2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Computational Acquisition and Display Technologies for Light Fields2019

    • Author(s)
      Keita Takahashi
    • Organizer
      JSAP-OSA Joint Symposia, Information Photonics
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Learning to Capture Light Fields through a Coded Aperture Camera2018

    • Author(s)
      Yasutaka Inagaki, Yuto Kobayashi, Keita Takahashi, Toshiaki Fujii, Hajime Nagahara
    • Organizer
      European Conference on Computer Vision (ECCV)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 符号化開口カメラを用いた視差推定手法の深層学習による最適化2018

    • Author(s)
      稲垣 安隆, 高橋 桂太, 藤井 俊彰, 長原 一
    • Organizer
      画像符号化シンポジウム・映像メディア処理シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] 深層学習を用いた符号化開口カメラによる光線空間の取得2018

    • Author(s)
      稲垣 安隆, 小林優斗, 高橋 桂太, 藤井 俊彰, 長原 一
    • Organizer
      画像の認識・理解シンポジウム
    • Related Report
      2018 Research-status Report
  • [Remarks] Computational Camera Project

    • URL

      https://www.fujii.nuee.nagoya-u.ac.jp/~takahasi/Research/CompCam/index.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] Computational Camera Project

    • URL

      http://www.fujii.nuee.nagoya-u.ac.jp/~takahasi/Research/CompCam/index.html

    • Related Report
      2018 Research-status Report

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

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