3次元ディスプレイに向けた任意曲面物体からのホログラム生成アルゴリズムの開発

2015 Fiscal Year Annual Research Report

• Project/Area Number: 25330125
• Research Institution: Chiba University
• Principal Investigator: 下馬場 朋禄 千葉大学, 工学(系)研究科(研究院), 准教授 (20360563)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ホログラフィ / 3次元ディスプレイ / 回折計算 / アルゴリズム / 計算機合成ホログラム

Outline of Annual Research Achievements

ホログラフィによる3次元ディスプレイは光波面を忠実に再現できるため究極の方式として期待されている．この実用化には複雑な曲面を有する3次元物体からの光伝搬を計算し，ホログラムを高速に生成する必要がある．本研究ではポリゴンで近似することなく任意曲面から高速にホログラム計算ができる手法を開発し3次元像をリアルタイム再生することを目的としている.

前年度に申請者が開発を進めている点光源モデルでの高速化手法（波面記録法）を任意曲面生成向けに改良した．本年度は波面記録法の考えを拡張し，ホログラム計算でよく使われる角スペクトル法を任意曲面向けに拡張を行った．この方法は，最生像の高周波数成分がカットされてしまう問題があるが，計算量を抑えつつ任意曲面の計算が行える角スペクトル法の第一歩になる．この問題点は引き続き検証を行っていく．

前年度には3次元のカラーシーンからホログラムを計算する際に，RGB空間ではなくYCbCr空間上での計算手法を開発した．この手法により，RGB空間でのホログラム計算よりも最大で3倍の高速化を達成できたが，ランダム位相を使用していたため画質が劣化する問題があった．本年度は，ランダム位相を用いずにきれいな最生像が得られる手法の開発を行った．この手法をさらにYCbCr空間上での計算手法に適用することで，画質を劣化させずに計算を高速化できることを示した．

Research Products

• [Journal Article] Optical encryption for large-sized images (2016)
  • Author(s): Takuho Sanpei, Tomoyoshi Shimobaba, Takashi Kakue, Yutaka Endo, Ryuji Hirayama, Daisuke Hiyama, Satoki Hasegawa, Yuki Nagahama, Marie Sano, Minoru Oikawa, Takashige Sugie, Tomoyoshi Ito
  • Journal Title: Optics Communications Volume: 361 Pages: 138-142
  • Peer Reviewed
• [Journal Article] Holographic multi-projection using random phase-free method (2016)
  • Author(s): Yuki Nagahama, Tomoyoshi Shimobaba, Tetsuya Kawashima, Takashi Kakue, Tomoyoshi Ito
  • Journal Title: Applied Optics Volume: 55 Pages: 1118-1123
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Random phase-free computer-generated hologram (2015)
  • Author(s): Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Journal Title: Optics Express Volume: 23 Pages: 9549-9554
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Fast calculation of computer-gernerated hologram using run-length encoding based recurrence relation (2015)
  • Author(s): Takashi Nishitsuji, Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito
  • Journal Title: Optics Express Volume: 23 Pages: 9852-9857
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Random phase-free kinoform for large objects (2015)
  • Author(s): Tomoyoshi Shimobaba, Takashi Kakue, Yutaka Endo, Ryuji Hirayama, Daisuke Hiyama, Satoki Hasegawa, Yuki Nagahama, Marie Sano, Minoru Oikawa, Takashige Sugie, Tomoyoshi Ito
  • Journal Title: Optics Express Volume: 23 Pages: 17269-17274
  • Peer Reviewed
• [Journal Article] Aerial projection of three-dimensional motion-picture by electro-holography and parabolic mirrors (2015)
  • Author(s): Takashi Kakue, Tetsuya Kawashima, Keisuke Suzuki, Tomoyoshi Shimobaba and Tomoyoshi Ito
  • Journal Title: Scientific Report Volume: 5 Pages: 11750
  • Peer Reviewed / Open Access
• [Journal Article] Improvement of the image quality of random phase-free holography using an iterative method (2015)
  • Author(s): Tomoyoshi Shimobaba, Takashi Kakue, Yutaka Endo, Ryuji Hirayama, Daisuke Hiyama, Satoki Hasegawa, Yuki Nagahama, Marie Sano, Minoru Oikawa, Takashige Sugie, Tomoyoshi Ito
  • Journal Title: Optics Communications Volume: 355 Pages: 596-601
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Computer-generated hologram for real scenes using a portable plenoptic camera (2015)
  • Author(s): Yutaka Endo, Koki Wakunami, Tomoyoshi Shimobaba, Takashi Kakue, Daisuke Arai, Yasuyuki Ichihashi, Kenji Yamamoto, and Tomoyoshi Ito
  • Journal Title: Optics Communications Volume: 356 Pages: 468-471
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Simple and fast cosine approximation method for computer-generated hologram calculation (2015)
  • Author(s): Takashi Nishitsuji, Tomoyoshi Shimobaba, Takashi Kakue, Daisuke Arai, Tomoyoshi Ito
  • Journal Title: Optics Express Volume: 23 Pages: 32465-32470
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Real-time time-division color electroholography using a single GPU and a USB module for synchronizing reference light (2015)
  • Author(s): Hiromitsu Araki, Naoki Takada, Hiroaki Niwase, Shohei Ikawa, Masato Fujiwara, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Journal Title: Applied Optics Volume: 54 Pages: 10029-10034
  • Peer Reviewed
• [Journal Article] Review of fast algorithms and hardware implementations on computer holography (2015)
  • Author(s): Tomoyoshi Shimobaba, Takashi kakue, Tomoyoshi Ito
  • Journal Title: IEEE Transactions on Industrial Informatics Volume: 99 Pages: 99
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Gradation Expression of Time-Division Color Electroholography using LCD Panels (2015)
  • Author(s): Masato Fujiwara, Naoki Takada, Hiromitsu Araki, Hiroaki Niwase, Yuki Maeda, Shohei Ikawa, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Organizer: IDW15
  • Place of Presentation: Otsu JAPAN
  • Year and Date: 2015-12-10
  • Int'l Joint Research
• [Presentation] Image Quality Improvement of Electroholography by Using Spatiotemporal Division Method (2015)
  • Author(s): Yuki Maeda, Naoki Takada, Hiroaki Niwase, Hiromitsu Araki, Masato Fujiwara, Shohei Ikawa, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Organizer: IDW15
  • Place of Presentation: Otsu JAPAN
  • Year and Date: 2015-12-10
  • Int'l Joint Research
• [Presentation] Real-Time Electroholography Using Multi-GPU Cluster System with a Single Spatial Light Modulator and Infiniband Network (2015)
  • Author(s): Naoki Takada, Hiroaki Niwase, Hiromitsu Araki, Yuki Maeda, Masato Fujiwara, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Organizer: IDW15
  • Place of Presentation: Otsu JAPAN
  • Year and Date: 2015-12-10
  • Int'l Joint Research
• [Presentation] Lensless holographic projection and its related work (2015)
  • Author(s): Tomoyoshi Shimobaba, Yuki Nagahama, Takashi Kakue, Tomoyoshi Ito
  • Organizer: IDW15
  • Place of Presentation: Otsu JAPAN
  • Year and Date: 2015-12-10
  • Int'l Joint Research / Invited
• [Presentation] Acceleration of Hologram Generation by Optimizing Arrangement of Wavefront Recording Planes (2015)
  • Author(s): Naotaka Hasegawa, Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito
  • Organizer: ACM SIGGRAPH VRCAI2015
  • Place of Presentation: Kobe Japan
  • Year and Date: 2015-10-30
  • Int'l Joint Research
• [Presentation] Development of the Emulator to Verify the Accuracy of Special-Purpose Computer for Holographic Projector (2015)
  • Author(s): Naotaka Hasegawa, Tomoyoshi Shimobaba, Takashi Kakue and Tomoyoshi Ito
  • Organizer: 3D systems and Applications (3DSA2015)
  • Place of Presentation: Taiwan
  • Year and Date: 2015-08-01 – 2015-08-01
  • Int'l Joint Research
• [Presentation] Integral Photographic Camera with Different Angles of View in Horizontal and Vertical Directions for Quality Improvement of Holographic Images (2015)
  • Author(s): Yoji Shibuya, Tomoki Hayashi, Tomohiro Suzuki, Yasuyuki Ichihashi, Ryutaro Oi, Kenji Yamamoto, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Organizer: 3D systems and Applications (3DSA2015)
  • Place of Presentation: Taiwan
  • Year and Date: 2015-08-01
  • Int'l Joint Research
• [Presentation] Real-time and low speckle holographic projection (2015)
  • Author(s): Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito
  • Organizer: IEEE International Conference on Industrial Informatics INDIN' 15 (Special Session on Digital Holography for Industrial Applications)
  • Place of Presentation: Cambridge, UK
  • Year and Date: 2015-07-22 – 2015-07-22
  • Int'l Joint Research / Invited
• [Presentation] Real-time spatiotemporal division multiplexing electroholography utilizing movie features (2015)
  • Author(s): N. Takada, H. Niwase, H. Araki, M. Fujiwara, Y. Maeda, H. Nakayama, T. Kakue, T. Shimobaba, T. Ito
  • Organizer: Proceedings of the 2015 Collaborative Conference on 3D & Materials Research (CC3DMR)
  • Place of Presentation: Busan, South Korea
  • Year and Date: 2015-06-15 – 2015-06-15
  • Int'l Joint Research / Invited
• [Presentation] Aerial projection of three-dimensional images reconstructed from computer-generated image holograms (2015)
  • Author(s): Takashi Kakue, Takashi Nishitsuji, Tetsuya Kawashima, Tomoyoshi Shimobaba, Tomoyoshi Ito
  • Organizer: The 14th Workshop on Information Optics (WIO2015)
  • Place of Presentation: Kyoto Garden Palace
  • Year and Date: 2015-06-01 – 2015-06-01
  • Int'l Joint Research / Invited