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Cloud Modeling from a Single Photograph

Research Project

Project/Area Number 16K12571
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Entertainment and game informatics 1
Research InstitutionWakayama University

Principal Investigator

Iwasaki Kei  和歌山大学, システム工学部, 准教授 (90379610)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsモデリング / 雲 / テクスチャ合成 / ボリュームデータ / 画像
Outline of Final Research Achievements

We propose a modeling method of clouds from a single photograph. To synthesize realistic images of outdoor scenes, modeling of 3D clouds is necessary. However, synthesizing realistic clouds is still a difficult task. To address this problem, we propose an example-based volume texture synthesis to model non-homogeneous density volumes. Our method prepares an example cloud volume data using a physically-based fluid simulator. Then the output cloud volume is automatically synthesized from the example cloud volume data so that its rendered image becomes similar to the clouds in the input photograph. In contrast to the previous texture synthesis methods, our method synthesizes density volumes taking into account scattering and transmittance of light. We show several cloud volumes whose rendered images are similar to the input photograph.

Academic Significance and Societal Importance of the Research Achievements

画像から表面形状や照明情報を推定するインバースレンダリングの従来研究では,不透明か透明な材質しか扱っていない.本研究は,画像から半透明ボリュームの密度分布を推定するものであり,新たなインバースレンダリング研究の一つとなりうる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] A method for estimating the errors in many-light rendering with supersampling2019

    • Author(s)
      Sakai Hirokazu、Nabata Kosuke、Yasuaki Shinya、Iwasaki Kei
    • Journal Title

      Computational Visual Media

      Volume: 印刷中 Issue: 2 Pages: 151-160

    • DOI

      10.1007/s41095-019-0137-0

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Visual simulation of clouds2017

    • Author(s)
      Dobashi Yoshinori、Iwasaki Kei、Yue Yonghao、Nishita Tomoyuki
    • Journal Title

      Visual Informatics

      Volume: 1 Issue: 1 Pages: 1-8

    • DOI

      10.1016/j.visinf.2017.01.001

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] An Error Estimation Framework for Many-Light Rendering2016

    • Author(s)
      Nabata K, Iwasaki K, Dobashi Y, Nishita T
    • Journal Title

      Computer Graphics Forum

      Volume: 35(7) Issue: 7 Pages: 431-439

    • DOI

      10.1111/cgf.13040

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Error Estimation for Many-light Rendering with Supersampling2018

    • Author(s)
      Hirokazu Sakai, Kosuke Nabata, Shinya Yasuaki, Kei Iwasaki
    • Organizer
      SIGGRAPH ASIA 2018 Technical Briefs
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スーパーサンプリングを用いた多光源レンダリングのための誤差推定法2018

    • Author(s)
      酒井広和, 名畑豪祐,安明真哉,岩崎慶
    • Organizer
      VC2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] 関与媒質の多光源レンダリングのための誤差推定法2017

    • Author(s)
      安明真哉, 名畑豪祐, 岩崎慶
    • Organizer
      情報処理学会第79回全国大会
    • Place of Presentation
      名古屋大学
    • Year and Date
      2017-03-16
    • Related Report
      2016 Research-status Report
  • [Presentation] Importance Caching for Homogeneous Participating Media2017

    • Author(s)
      Ryosuke Enotani, Shinya Yasuaki, Kei Iwasaki, Yoshinori Dobashi, Tomoyuki Nishita
    • Organizer
      The Image Electronics and Visual Computing Workshop 2017
    • Place of Presentation
      ベトナム
    • Year and Date
      2017-02-28
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Example-based Synthesis of Three-dimensional Clouds from Photographs2017

    • Author(s)
      K. Iwasaki, Y. Dobashi, M. Okabe
    • Organizer
      Computer Graphics International
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 領域削減の自動化によるWavelet Turbulenceの効率化2017

    • Author(s)
      上西直人, 佐藤周平, 岩崎慶, 西田友是
    • Organizer
      情報処理学会全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 複数のfar-field格子を用いた流体シミュレーション2017

    • Author(s)
      大垣公輔, 佐藤周平, 岩崎慶, 西田友是
    • Organizer
      情報処理学会全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] SawToothサイクルの拡張による圧力場計算の高速化2017

    • Author(s)
      鶴賀淳樹, 岩崎 慶
    • Organizer
      情報処理学会全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 関与媒質のレンダリングのための誤差推定法2017

    • Author(s)
      岩崎 慶, 名畑 豪祐
    • Organizer
      コンピュータグラフィクスとビジュアル情報学研究会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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