Basic Information

Faculty

• Faculty of Engineering

Email Address

• Email Address

  kawahara.ryo.7zkyoto-u.ac.jp

Academic Degree

• 25 Mar. 2019

  京都大学博士（情報学）
• 23 Mar. 2015

  京都大学修士（情報学）

Academic Resume (Graduate Schools)

• 京都大学, 大学院情報学研究科博士後期課程知能情報学専攻, 修了
• 京都大学, 大学院情報学研究科修士課程知能情報学専攻, 修了

Academic Resume (Undergraduate School/Majors)

• 京都大学, 工学部電気電子工学科, 卒業

Research History

• From Oct. 2024, To Present

  Kyoto University, Graduate School of Informatics, 講師
• From Apr. 2021, To Sep. 2024

  Kyushu Institute of Technology, Faculty of Computer Science and Systems Engineering, 助教
• From Apr. 2019, To Mar. 2021

  Kyoto University, Graduate School of Informatics, 特定研究員
• From Apr. 2015, To Mar. 2018

  Japan Society for the Promotion of Science, 特別研究員DC1

ID,URL

• ORCID ID

  0000-0002-9819-3634

• J-Global ID

  202401008998652231

• Researcher number

  80911263

researchmap URL

• https://researchmap.jp/kawahara_ryo

Research

Papers

• Separating Direct and Global Components from Novel Viewpoints

  Ryo Kawahara

  2025

  
• FluoNeRF: Fluorescent Novel-View Synthesis under Novel Light Source Colors

  Ryo Kawahara

  2025

  
• Polarization As Texture: Microscale 3D Shape from Polarized Light Focus

  Ryo Kawahara

  2025

  
• Surface Normals and Shape From Water.

  Satoshi Murai; Meng-Yu Kuo; Ryo Kawahara; Shohei Nobuhara; Ko Nishino

  in Proc. of IEEE International Conference on Computer Vision (ICCV), 2019, Peer-reviewed

  
• Using Extended Light Sources for Relighting from a Small Number of Images.

  Toshiki Hirao; Ryo Kawahara; Takahiro Okabe

  VISIGRAPP (3): VISAPP, 2024, Peer-reviewed

  
• Learning Projection Patterns for Direct-Global Separation.

  Takaoki Ueda; Ryo Kawahara; Takahiro Okabe

  VISIGRAPP (3): VISAPP, 2024, Peer-reviewed

  
• Learning 3D Human UV with Loose Clothing from Monocular Video.

  Meng-Yu Jennifer Kuo; Jingfan Guo; Ryo Kawahara

  VISIGRAPP (4): VISAPP, 2024, Peer-reviewed

  
• Separating Partially-Polarized Diffuse and Specular Reflection Components under Unpolarized Light Sources.

  Soma Kajiyama; Taihe Piao; Ryo Kawahara; Takahiro Okabe

  IEEE/CVF Winter Conference on Applications of Computer Vision(WACV), 2023, Peer-reviewed

  
• Polarimetric Underwater Stereo.

  Ryo Kawahara; Meng-Yu Jennifer Kuo; Takahiro Okabe

  Image Analysis - 22nd Scandinavian Conference, 2023, Peer-reviewed

  
• Teleidoscopic Imaging System for Microscale 3D Shape Reconstruction.

  Ryo Kawahara; Meng-Yu Jennifer Kuo; Shohei Nobuhara

  CVPR, 2023, Peer-reviewed

  
• Light Source Separation and Intrinsic Image Decomposition under AC Illumination.

  Yusaku Yoshida; Ryo Kawahara; Takahiro Okabe

  CVPR, 2023, Peer-reviewed

  
• Estimating Absorption Coefficient from a Single Image via Entropy Minimization.

  Junya Katahira; Ryo Kawahara; Takahiro Okabe

  BMVC, 2023, Peer-reviewed

  
• Spectral Absorption from Two-view Hyperspectral Images.

  Kenta Kageyama; Ryo Kawahara; Takahiro Okabe

  Proceedings of the 17th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, 2022, Peer-reviewed

  
• Online Illumination Planning for Shadow-Robust Photometric Stereo.

  Hirochika Tanikawa; Ryo Kawahara; Takahiro Okabe

  Frontiers of Computer Vision - 28th International Workshop(IW-FCV), 2022, Peer-reviewed

  
• Surface Normals and Shape From Water.

  Meng-Yu Jennifer Kuo; Satoshi Murai; Ryo Kawahara; Shohei Nobuhara; Ko Nishino

  IEEE Transactions on Pattern Analysis and Machine Intelligence, 2022, Peer-reviewed

  
• Shape From Sky: Polarimetric Normal Recovery Under the Sky.

  Tomoki Ichikawa; Matthew Purri; Ryo Kawahara; Shohei Nobuhara; Kristin J. Dana; Ko Nishino

  IEEE Conference on Computer Vision and Pattern Recognition(CVPR), 2021, Peer-reviewed

  
• Polarimetric Normal Stereo.

  Yoshiki Fukao; Ryo Kawahara; Shohei Nobuhara; Ko Nishino

  IEEE Conference on Computer Vision and Pattern Recognition(CVPR), 2021, Peer-reviewed

  
• Non-Rigid Shape From Water.

  Meng-Yu Jennifer Kuo; Ryo Kawahara; Shohei Nobuhara; Ko Nishino

  IEEE Transactions on Pattern Analysis and Machine Intelligence, 2021, Peer-reviewed

  
• Appearance and Shape from Water Reflection.

  Ryo Kawahara; Meng-Yu Jennifer Kuo; Shohei Nobuhara; Ko Nishino

  IEEE Winter Conference on Applications of Computer Vision(WACV), 2020, Peer-reviewed

  
• A Novel Catadioptric Ray-Pixel Camera Model and its Application to 3D Reconstruction.

  Ryo Kawahara

  2019, Peer-reviewed

  
• Dynamic 3D capture of swimming fish by underwater active stereo

  Ryo Kawahara; Shohei Nobuhara; Takashi Matsuyama

  Methods in Oceanography, Dec. 2016

  
• Interference-Free Epipole-Centered Structured Light Pattern for Mirror-Based Multi-view Active Stereo

  Tomu Tahara; Ryo Kawahara; Shohei Nobuhara; Takashi Matsuyama

  2015 International Conference on 3D Vision, Oct. 2015, Peer-reviewed

  
• Underwater 3D Surface Capture Using Multi-view Projectors and Cameras with Flat Housings

  Ryo Kawahara; Shohei Nobuhara; Takashi Matsuyama

  IPSJ Transactions on Computer Vision and Applications, 2014

  
• A Pixel-Wise Varifocal Camera Model for Efficient Forward Projection and Linear Extrinsic Calibration of Underwater Cameras with Flat Housings

  Ryo Kawahara; Shohei Nobuhara; Takashi Matsuyama

  2013 IEEE International Conference on Computer Vision Workshops, Dec. 2013, Peer-reviewed

  

Awards

• 17 Mar. 2015

  優秀研究賞（京都大学第９回ICTイノベーション）
• 16 Sep. 2017

  奨励賞（研究報告コンピュータビジョンとイメージメディア）
• 08 Dec. 2012

  Best Paper Award（2013 IEEE International Conference on Computer Vision）

External funds: Kakenhi

• Multi-layer Light Field for Underwater 3D Shape Recovery

  Grant-in-Aid for Research Activity Start-up

  1002:Human informatics, applied informatics and related fields

  Kyushu Institute of Technology

  Ryo Kawahara

  From 30 Aug. 2021, To 31 Mar. 2023, Project Closed

  コンピュータビジョン;コンピュテーショナルフォトグラフィ;３次元形状復元;水中撮影;光線空間;偏光解析;水中3次元形状復元;偏光;カメラキャリブレーション

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21K21319/
• 球面レンズ式マクロステレオフォトグラフィによる微小物体の三次元形状・反射特性計測

  Grant-in-Aid for Early-Career Scientists

  Basic Section 61010:Perceptual information processing-related

  Kyushu Institute of Technology

  川原 僚

  From 01 Apr. 2022, To 31 Mar. 2025, Granted

  3次元形状復元;コンピュテーショナルフォトグラフィ;カメラキャリブレーション;多視点ステレオ;偏光;コンピュータビジョン;３次元形状復元;マクロフォトグラフィー

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22K17914/
• Computational Illumination with High Degrees-of-Freedom Active Light Fields

  Grant-in-Aid for Scientific Research (A)

  Medium-sized Section 61:Human informatics and related fields

  Okayama University;Kyushu Institute of Technology

  岡部 孝弘

  From 01 Apr. 2020, To 31 Mar. 2025, Granted

  コンピュータビジョン;コンピュテーショナルフォトグラフィ;コンピュテーショナルイルミネーション;光線空間

  https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20H00612/