Cloud Modeling from a Single Photograph

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K12571
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Entertainment and game informatics 1
• Research Institution: Wakayama 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
• Keywords: モデリング / 雲

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.

Free Research Field

コンピュータグラフィックス

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．