Measuring States of Plant Photosynthesis by Structured Light Projection

• Project/Area Number: 23650078
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Perception information processing/Intelligent robotics
• Research Institution: Tohoku University
• Principal Investigator: OKATANI Takayuki 東北大学, 情報科学研究科, 教授 (00312637)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: コンピュータビジョン / 植物光合成状態計測 / 構造化光投影 / 画像計測 / プロジェクタカメラ / 光合成状態計測 / 植物蛍光計測 / クロロフィル蛍光 / 光合成反応計測 / プロジェクタカメラシステム

Research Abstract

We have studied the application of a range of computer vision techniques of separating reflection components to improving measuring accuracy of chlorophyll fluorescence. One of the main contributions is that we have confirmed that the method of projecting structured light to plants and separating the direct and indirect (or global) components can really extract sub-surface scattering of incident light onto leaves of plants, resulting in the improvement of measuring chlorophyll fluorescence. We have also developed a new method of separating specular and diffuse reflection components based on the dichromatic reflection model.

Research Products

• [Journal Article] Discrete Maximum Posterior Marginal Inference for Non- uniformly Discretized Variable Space (2013)
  • Author(s): Masaki Saito, Takayuki Okatani, and Koichiro Deguchi
  • Journal Title: Proceedings of IEEE Conference on Computer Vision and Pattern Recognition Volume: 1 Pages: 57-64
  • DOI: 10.1109/cvpr.2013.15
  • Peer Reviewed
• [Journal Article] Optimal inergration of photometric and geometric surface measurements using inaccurate reflectance/illumination knowledge (2012)
  • Author(s): Takayuki Okatani, Koichiro Deguchi
  • Journal Title: Proceedings of IEEE Conference on Computer Vision and Pattern Recognition Volume: 1巻 Pages: 254-261
  • Peer Reviewed
• [Journal Article] Recognizing Surface Qualities from Natural Images Vased on Learning to Rank (2012)
  • Author(s): Takashi Abe, Takayuki Okatani, Koichiro Deguchi
  • Journal Title: Proceedings of International Conference on Pattern Recognition(ICPR) Volume: 1巻 Pages: 3712-3715
  • URL: http://www.vision.is.tohoku.ac.jp/index.php/download_file/view/34/166/
  • Peer Reviewed
• [Journal Article] Optimal integration of photometric and geometric surface measurements using inaccurate reflectance/illumination knowledge (2012)
  • Author(s): Takayuki Okatani and Koichiro Deguchi
  • Journal Title: Proceedings of Computer Vision and Pattern Recognition Volume: 1 Pages: 254-261
  • DOI: 10.1109/cvpr.2012.6247683
  • Peer Reviewed
• [Journal Article] Efficient Algorithm for Low-rank Matrix Factorization with Missing Components and Performance Comparison of Latest Algorithms (2011)
  • Author(s): Takayuki Okatani, Takahiro Yoshida, Koichiro Deguchi
  • Journal Title: Proceedings of International Conference on Computer Vision Volume: 1 Pages: 1-8
  • DOI: 10.1109/iccv.2011.6126324
  • Peer Reviewed
• [Journal Article] Accurate and robust planar tracking based on a model of image sampling and reconstruction process (2011)
  • Author(s): Eisuke Ito, Takayuki Okatani, Koichiro Deguchi
  • Journal Title: Proceedings of The 10th IEEE International Symposium on Mixed and Augmented Reality Volume: 1 Pages: 1-8
  • DOI: 10.1109/ismar.2011.6092364
  • Peer Reviewed
• [Journal Article] Efficient Algorithm for Low-rank Matrix Factorization with Missing Components and Performance Comparison of Latest Algorithms (2011)
  • Author(s): Takayuki Okatani, Takahiro Yoshida, Koichiro Deguchi
  • Journal Title: Proceedings of International Conference on Computer Vision(ICCV) Volume: 1 Pages: 1-8
  • Peer Reviewed
• [Journal Article] Accurate and robust planar tracking based on a model of image sampling and reconstruction process (2011)
  • Author(s): Eisuke Ito, Takayuki Okatani, Koichiro Deguchi
  • Journal Title: Proceedings of The 10th IEEE International Symposium on Mixed and Augmented Reality(ISMAR) Volume: 1 Pages: 1-8
  • Peer Reviewed
• [Presentation] 非負値行列分解を用いた画像の鏡面反射分離 (2013)
  • Author(s): 明石康宏, 岡谷貴之
  • Organizer: 情報処学会CVIM研究会
  • Place of Presentation: 東京
  • Year and Date: 2013-05-23
• [Presentation] デイープニューラルネットワークを用いた物体表面の光沢感認識 (2013)
  • Author(s): 重川裕和, 岡谷貴之
  • Organizer: 情報処学会CVIM研究会
  • Place of Presentation: 東京
  • Year and Date: 2013-05-23
• [Presentation] プロジェクタカメラシステムの幾何キャリブレーション (2013)
  • Author(s): 岡谷貴之
  • Organizer: 質感脳情報学研究集会「投影型デイスプレイ」
  • Place of Presentation: 大阪
  • Year and Date: 2013-02-21
  • Invited
• [Presentation] コンピュータビジヨンにおけるMRF最適化問題への平均場近似及びその拡張手法の応用 (2012)
  • Author(s): 齋藤真樹, 岡谷貴之, 出ロ一郎
  • Organizer: 画像の認識・理解シンポジウ厶
  • Place of Presentation: 福岡
  • Year and Date: 2012-08-06
• [Presentation] 多視点3次元復元の研究動向 (2011)
  • Author(s): 鳥居秋彦，岡谷貴之，延原章平
  • Organizer: 情報処理学会研究報告Vol.2011-CVIM-176 No.1
  • Place of Presentation: 大阪大学
• [Presentation] 震災特別セッション「 震災復興へのビジョン」 (2011)
  • Author(s): 岡谷貴之
  • Organizer: 画像の認識・理解シンポジウム(招待講演)
  • Place of Presentation: 金沢
• [Presentation] 非負値行列因子分解を用いた画像の鏡面反射分離
  • Author(s): 明石康宏 , 岡谷貴之
  • Organizer: 情報処理学会CVIM研究会
  • Place of Presentation: 東京
• [Presentation] ディープニューラルネットワークを用いた物体表面の光沢感認識
  • Author(s): 重川裕和 , 岡谷貴之
  • Organizer: 情報処理学会CVIM研究会
  • Place of Presentation: 東京
• [Presentation] コンピュータビジョンにおけるMRF最適化問題への平均場近似及びその拡張手法の応用
  • Author(s): 齋藤真樹，岡谷貴之，出口光一郎
  • Organizer: 画像の認識理解シンポジウム
  • Place of Presentation: 福岡国際会議場
• [Presentation] プロジェクタカメラシステムの幾何キャリブレーション
  • Author(s): 岡谷貴之
  • Organizer: 質感脳情報学研究集会「投影型ディスプレイ」
  • Place of Presentation: 大阪大学
  • Invited