Takahiro OKABE Ph.D. in Information Science and Technology Department of Artificial Intelligence Kyushu Institute of Technology Professor

Address: 680-4 Kawazu, Iizuka, Fukuoka 820-8502, Japan
Office: N107 General Research Building
Phone: +81-948297629
E-mail: okabe@ai.kyutech.ac.jp

• Toshiki Hirao, Ryo Kawahara, and Takahiro Okabe,
  "Using extended light sources for relighting from a small number of images",
  In Proc. the 19th International Conference on Computer Vision Theory and Applications (VISAPP2024),
  pp.607-615, February 2024, Rome, Italy. (oral: short paper) [pdf]
• Takaoki Ueda, Ryo Kawahara, and Takahiro Okabe,
  "Learning projection patterns for direct-global separation",
  In Proc. the 19th International Conference on Computer Vision Theory and Applications (VISAPP2024),
  pp.599-606, February 2024, Rome, Italy. (poster: short paper) [pdf]
• Junya Katahira, Ryo Kawahara, and Takahiro Okabe,
  "Estimating absorption coefficient from a single image via entropy minimization",
  In Proc. the 34th British Machine Vision Conference (BMVC2023),
  November 2023, Aberdeen, UK. (poster) [pdf] [Proceedings]
• Yusaku Yoshida, Ryo Kawahara, and Takahiro Okabe,
  "Light source separation and intrinsic image decomposition under AC illumination",
  In Proc. the IEEE/CVF Conference on Computer Vision and Pattern Recognition 2023 (CVPR2023),
  pp.5735-5743, June 2023, Vancouver, Canada. (poster) [Project Page] [Open Access Repository]
• Ryo Kawahara, Meng-Yu Jennifer Kuo, and Takahiro Okabe,
  "Polarimetric underwater stereo",
  In Proc. the 22nd Scandinavian Conference on Image Analysis (SCIA2023), LNCS 13885,
  pp.534-550, April 2023, Lapland, Finland. (poster)
• Soma Kajiyama, Taihe Piao, Ryo Kawahara, and Takahiro Okabe,
  "Separating partially-polarized diffuse and specular reflection components under unpolarized light sources",
  In Proc. the 23rd IEEE/CVF Winter Conference on Applications of Computer Vision (WACV2023),
  pp.2549-2558, January 2023, Waikoloa Village, HI, USA. (short oral + poster) [Open Access Repository]
• Hirochika Tanikawa, Ryo Kawahara, and Takahiro Okabe,
  "Online Illumination Planning for Shadow-Robust Photometric Stereo",
  In Proc. the 28th International Workshop on Frontiers of Computer Vision (IW-FCV2022),
  OS2-3, February 2022, online (Hiroshima, Japan). (oral) [pdf] (Best Paper Award) (Best Presentation Award)
• Kenta Kageyama, Ryo Kawahara, and Takahiro Okabe,
  "Spectral Absorption from Two-View Hyperspectral Images",
  In Proc. the 17th International Conference on Computer Vision Theory and Applications (VISAPP2022),
  pp.715-721, February 2022, online (Vienna, Austria). (oral: short paper) [pdf]
• Chao Wang, Michihiko Okuyama, Ryo Matsuoka, and Takahiro Okabe,
  "Per-Pixel Water Detection on Surfaces with Unknown Reflectance",
  IEICE Transactions on Information and Systems, Vol.E104-D, No.10, pp.1555-1562, October 2021. [pdf]
• Kazuya Fujita, Ryo Matsuoka, and Takahiro Okabe,
  "Detecting Momentary Shadows from Visible and Thermal Image Pair",
  In Proc. the 29th European Signal Processing Conference (EUSIPCO2021),
  pp.606-610, August 2021, online (Dublin, Ireland). (oral) [pdf]
• Chao Wang and Takahiro Okabe,
  "Per-Pixel Water and Oil Detection on Surfaces with Unknown Reflectance",
  In Proc. the 29th European Signal Processing Conference (EUSIPCO2021),
  pp.601-605, August 2021, online (Dublin, Ireland). (oral) [pdf]
• Kota Arieda and Takahiro Okabe,
  "Illumination Planning for Measuring Per-Pixel Surface Roughness",
  In Proc. the 17th International Conference on Machine Vision Applications (MVA2021),
  P2-13, July 2021, online (Nagoya, Japan). (poster) [pdf]
• Yuto Nisaka, Ryo Matsuoka, Toshiyuki Amano, and Takahiro Okabe,
  "Fast Separation of Specular, Diffuse, and Global Components via Polarized Pattern Projection",
  The 27th International Workshop on Frontiers of Computer Vision (IW-FCV2021),
  OS4-3, February 2021, online (Daegu, South Korea). (oral) [pdf]
• Daichi Hidaka and Takahiro Okabe,
  "Image-based Material Editing for Making Reflective Objects Fluorescent",
  In Proc. the 15th International Conference on Computer Graphics Theory and Applications (GRAPP2020),
  pp.355-360, February 2020, Valletta, Malta. (oral: short paper) [pdf]
• Ruri Oya, Ryo Matsuoka, and Takahiro Okabe,
  "NMF vs. ICA for Light Source Separation under AC Illumination",
  In Proc. the 15th International Conference on Computer Vision Theory and Applications (VISAPP2020),
  pp.460-465, February 2020, Valletta, Malta. (oral: short paper) [pdf]
• Takuto Nakashima, Ryo Matsuoka, and Takahiro Okabe,
  "Inverse Lighting from Cast Shadows under Unknown Radiometric Response Function",
  In Proc. the 26th International Workshop on Frontiers of Computer Vision (IW-FCV2020), CCIS 1212,
  pp.363-375, February 2020, Kagoshima, Japan. (oral) [pdf] (Best Student Paper Award)
• Koji Koyamatsu, Daichi Hidaka, Takahiro Okabe, and Hendrik P. A. Lensch,
  "Reflective and Fluorescent Separation under Narrow-Band Illumination",
  In Proc. the 30th IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR2019),
  pp.7577-7585, June 2019, Long Beach, CA, USA. (poster) [Open Access Repository]
• Moriaki Torii, Takahiro Okabe, and Toshiyuki Amano,
  "Multispectral Direct-Global Separation of Dynamic Scenes",
  In Proc. the 19th IEEE Winter Conference on Applications of Computer Vision (WACV2019),
  pp.1923-1931, January 2019, Waikoloa Village, HI, USA. (short oral + poster) [pdf]
• Yuta Asano, Misaki Meguro, Chao Wang, Antony Lam, Yinqiang Zheng, Takahiro Okabe, and Imari Sato,
  "Coded Illumination and Imaging for Fluorescence Based Classification",
  In Proc. the 15th European Conference on Computer Vision (ECCV2018), LNCS 11212,
  pp.511-526, September 2018, Munic, Germany. (poster) [Open Access Repository]
• Shinnosuke Oya and Takahiro Okabe,
  "Image-Based Relighting with 5-D Incident Light Fields",
  In Proc. the 6th Color and Photometry in Computer Vision Workshop (CPCV2017) in conjunction with ICCV2017,
  October 2017, Venice, Italy. (oral) [pdf]
• Kouki Takechi and Takahiro Okabe,
  "Diffuse-Specular Separation of Multi-View Images under Varying Illumination",
  In Proc. the 2017 IEEE International Conference on Image Processing (ICIP2017),
  pp.2632-2636, September 2017, Beijing, China. (poster) [pdf]
• Chao Wang and Takahiro Okabe,
  "Joint Optimization of Coded Illumination and Grayscale Conversion for One-Shot Raw Material Classification",
  In Proc. the 28th British Machine Vision Conference (BMVC2017),
  September 2017, London, UK. (poster) [pdf]

Light Transport: Kayano Maeda and Takahiro Okabe, "Acquiring Multispectral Light Transport Using Multi-Primary DLP Projector", In Proc. the 6th International Conference on Image Processing Theory, Tools and Applications (IPTA2016), No.127, December 2016, Oulu, Finland. (poster) [pdf]

Diffuse-Specular Separation: Naoto Kobayashi and Takahiro Okabe, "Separating Reflection Components in Images under Multispectral and Multidirectional Light Sources", In Proc. the 23rd IAPR International Conference on Pattern Recognition (ICPR2016), pp.3199-3204, December 2016, Cancun, Mexico. (oral) [pdf]

Light Field Acquisition: Motohiro Nakamura, Shinnosuke Oya, Takahiro Okabe, and Hendrik P. A. Lensch, "Acquiring 4D Light Fields of Self-Luminous Extended Light Sources Using Programmable Filter", IEICE Transactions on Information and Systems, Vol.E99-D, No.9, pp.2360-2367, September 2016. [pdf] Motohiro Nakamura, Takahiro Okabe, and Hendrik P. A. Lensch, "Acquiring 4D Light Fields of Self-Luminous Light Sources Using Programmable Filter", In Proc. the 1st Workshop on Light Field for Computer Vision (LF4CV2014) in conjunction with ECCV2014, LNCS 8926, pp.588-599, September 2014, Zurich, Switzerland. (poster)

Image-Based Lighting: Megumi Miura, Takahiro Okabe, and Imari Sato, "Is Spectral Lighting Environment Necessary for Photorealistic Rendering?", In Proc. the 14th ACM SIGGRAPH International Conference on Virtual Reality Continuum and Its Applications in Industry (VRCAI2015), No.9, October 2015, Kobe, Japan. (poster) [pdf]

Super-Resolution: Atsushi Fukushima and Takahiro Okabe, "Multiframe Super-Resolution for Flickering Objects", In Proc. the 16th International Conference on Computer Analysis of Images and Patterns (CAIP2015), LNCS 9257, pp.184-194, September 2015, Valletta, Malta. (poster) [pdf]

Inverse Lighting: Shuya Ohta and Takahiro Okabe, "Does Inverse Lighting Work Well under Unknown Response Function?", In Proc. the 10th International Conference on Computer Vision Theory and Applications (VISAPP2015), pp.652-657, March 2015, Berlin, Germany. (short oral) [pdf]

Shape and Reflectance Recovery: Masahiro Kitahara, Takahiro Okabe, Christian Fuchs, and Hendrik P. A. Lensch, "Simultaneous Estimation of Spectral Reflectance and Normal from a Small Number of Images", In Proc. the 10th International Conference on Computer Vision Theory and Applications (VISAPP2015), pp.303-313, March 2015, Berlin, Germany. (long oral) [pdf]

• DBLP
  
• Scopus
  

2017.03 -	Department of Artificial Intelligence, Kyushu Institute of Technology: Professor
2013.04 - 2017.02	Department of Artificial Intelligence, Kyushu Institute of Technology: Associate Professor
2012.11 - 2013.03	Institute of Industrial Science, The University of Tokyo (Sato Group): Project Associate Professor
2007.04 - 2012.10	Institute of Industrial Science, The University of Tokyo (Sato Group): Research Associate
2007.01 - 2007.03	Institute of Industrial Science, The University of Tokyo (Sato Group): Research Assistant
2001.01 - 2006.12	Institute of Industrial Science, The University of Tokyo (Sato Group): Technical Associate
2000.12	Graduate School of Science, The University of Tokyo (Theoretical Astrophysics Group): Withdrawal from Ph.D. Program
1999.03	Graduate School of Science, The University of Tokyo (Theoretical Astrophysics Group): Master of Science
1997.03	Department of Physics, School of Science, The University of Tokyo: Bachelor of Science

2019.04 -	Institute of Industrial Science, The University of Tokyo: Research Fellow
2017.04 - 2018.03	National Institute of Informatics: Visiting Professor
2014.04 - 2017.03	National Institute of Informatics: Visiting Associate Professor
2013.04 - 2019.03	Institute of Industrial Science, The University of Tokyo: Cooperative Research Fellow
2011.10 - 2012.09	Eberhard Karls Universität Tübingen (Computer Graphics Group: Prof. Hendrik Lensch): Visiting Scholar
2011.09	Universität Ulm (Computer Graphics Group: Prof. Hendrik Lensch): Visiting Scholar
2011.03	The University of Tokyo: Ph.D. in Information Science and Technology

• The 28th International Workshop on Frontiers of Computer Vision (IW-FCV2022): Best Paper Award, Best Presentation Award
• The 26th International Workshop on Frontiers of Computer Vision (IW-FCV2020): Best Student Paper Award
• The 12th European Conference on Computer Vision (ECCV2012): Outstanding Reviewer Award
• IPSJ the 50th Anniversary Best Paper Award
• The 10th Asian Conference on Computer Vision (ACCV2010): Sang Uk Lee Award
• The 3rd IEEE International Workshop on Projector-Camera Systems (ProCams2006): Best Paper Award

• IEICE Transactions on Information and Systems: Associate Editor (2010.5-2014.6)
• IPSJ Transactions on Computer Vision and Applications MIRU Conference Editorial Board: Technical Program Committee (2013,2014,2015,2016)
• IPSJ Transactions on Computer Vision and Applications Special Issue on MIRU: Associate Editor (2011)

• IEEE International Conference on Computer Vision (ICCV): Reviewer (2009,2011,2013,2015,2017,2019,2021,2023)
• IEEE Conference on Computer Vision and Pattern Recognition (CVPR): Reviewer (2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022)
• European Conference on Computer Vision (ECCV): Reviewer (2010,2012,2014,2016,2018,2020,2022)
• International Joint Conference on Artificial Intelligence (IJCAI): Program Committee (2023)
• ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia (SIGGRAPH Asia): Reviewer (2016)
• IAPR International Conference on Pattern Recognition (ICPR): Reviewer (2010,2012,2016,2018,2020)
• IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS): Reviewer (2012)
• IEEE Winter Conference on Applications of Computer Vision (WACV): Reviewer (2021)
• British Machine Vision Conference (BMVC): Reviewer (2017,2019,2020)
• Asian Conference on Computer Vision (ACCV): Reviewer (2010,2012,2014,2016,2018,2020)
• IEEE International Conference on Automatic Face and Gesture Recognition (FG): Reviewer (2013,2015)
• International Conference on 3D Vision (3DV): Program Committee (2020), Reviewer (2014,2015,2021,2022)
• International Conference on Image Processing Theory, Tools and Applications (IPTA): Technical Program Committee (2016)
• Pacific-Rim Symposium on Image and Video Technology (PSIVT): Reviewer (2010,2011,2013,2015,2017), Local Arrangement Committee (2009)
• Asian Conference on Pattern Recognition (ACPR): Reviewer (2017)
• ACM Symposium on Eye Tracking Research & Applications (ETRA): Reviewer (2012)
• International Conference on Machine Vision Applications (MVA): Reviewer (2021,2023)
• International Conference on Signal Image Technology and Internet Systems (SITIS): Program Committee (2016,2017)
• International Conference on Computer Vision Theory and Applications (VISAPP): Program Committee (2014,2015,2016,2017,2018)
• Scandinavian Conference on Image Analysis (SCIA): Reviewer (2011)
• SIBGRAPI Conference on Graphics, Patterns and Images (SIBGRAPI): International Program Committee (2017)
• IET Image Processing Conference (IPR): Program Committee (2012)
• International Workshop on Frontiers of Computer Vision (IW-FCV): Program Committee (2020,2021,2022,2023)
• IEEE Workshop on Emergent Issues in Large Amounts of Visual Data (WS-LAVD): Program Committee (2009)
• International Workshop on Gaze Sensing and Interactions (IWGSI): Program Committee (2010)