Dr. Ryutaro Oi Profile

Dr. Ryutaro Oi

at NICT

SPIE Involvement:

Author

Profile Summary

Dr. Ryutaro Oi is a senior researcher at Electromagnetic Applications Laboratory, Applied Electromagnetic Research Institute, National Institute of Information and Communications Technology (NICT), Japan. He received his Ph.D. in Science from University of Tokyo in 2004. He was a visiting researcher at Japan Broadcasting Corporation (NHK) Science & Technology Research Laboratories in 2004 and 2005. He joined NICT as a researcher in 2006. His areas of interests include holography and autostereoscopic 3D displays.

Publications (26)

Proceedings Article | 13 March 2024 Presentation + Paper

Presentation + Paper

Machine learning for the design of two-layer holographic optical elements

Ikuo Hoshi, Koki Wakunami, Yasuyuki Ichihashi, Ryutaro Oi

Proceedings Volume 12903, 129030M (2024) https://doi.org/10.1117/12.3001349

KEYWORDS: Holographic optical elements, Machine learning, Neural networks

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Proceedings Article | 1 November 2021 Paper

Paper

Phase-shifting interferometry for multidimensional incoherent digital holography and toward ultimately low light sensing

Tatsuki Tahara, Ryo Okamoto, Ayumi Ishii, Yuichi Kozawa, Takako Koujin, Atsushi Matsuda, Ryutaro Oi

Proceedings Volume 12057, 1205752 (2021) https://doi.org/10.1117/12.2607197

KEYWORDS: Digital holography, Holography, Phase shifts, Holograms, Phase interferometry, 3D image processing, Light emitting diodes

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Proceedings Article | 9 October 2021 Presentation + Paper

Presentation + Paper

Incoherent digital holographic microscopy for high-speed three-dimensional motion-picture sensing

Tatsuki Tahara, Yuichi Kozawa, Takako Koujin, Atsushi Matsuda, Ryutaro Oi

Proceedings Volume 11898, 118980D (2021) https://doi.org/10.1117/12.2599725

KEYWORDS: Digital holography, Holograms, Holography, 3D image reconstruction, 3D image processing, Microscopy, Image sensors, Nanoparticles

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Proceedings Article | 10 October 2020 Presentation + Paper

Presentation + Paper

Multidimensional digital holographic microscopy based on computational coherent superposition for coherent and incoherent light sensing

Tatsuki Tahara, Ryo Okamoto, Ayumi Ishii, Tomoyoshi Ito, Koki Wakunami, Yasuyuki Ichihashi, Ryutaro Oi

Proceedings Volume 11551, 115510M (2020) https://doi.org/10.1117/12.2573192

KEYWORDS: Digital holography, Holography, Superposition, Microscopy, Phase interferometry, Phase shifts, Color image segmentation, Colorimetry, Frequency division multiplexing, Doppler effect

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Proceedings Article | 6 April 2020 Paper

Paper

Study on holographic special-purpose computer for wavefront printing technology

Yasuyuki Ichihashi, Takashi Kakue, Koki Wakunami, Boaz Jessie Jackin, Ryutaro Oi, Tomosyoshi Shimobaba, Tomoyoshi Ito

Proceedings Volume 11353, 113530Q (2020) https://doi.org/10.1117/12.2554374

KEYWORDS: Wavefronts, Holograms, Printing, Remote sensing, Holography, Optical design, 3D image reconstruction, Data conversion, Digital holography

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SPIE Journal Paper | 27 April 2018 Open Access

Open Access

Three-dimensional reflection screens fabricated by holographic wavefront printer (Erratum)

Ryutaro Oi, Ping-Yen Chou, Boaz Jessie Jackin, Koki Wakunami, Yasuyuki Ichihashi, Makoto Okui, Yi-Pai Huang, Kenji Yamamoto

OE, Vol. 57, Issue 06, 069801, (April 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.6.069801

KEYWORDS: Holography, Wavefronts, Printing, 3D displays, 3D printing, Electromagnetism, Communication engineering, Communication and information technologies, Photonics, Electro-optical engineering

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Proceedings Article | 19 February 2018 Paper

Paper

Hologram printing for next-generation holographic display

Kenji Yamamoto, Boaz Jessie Jackin, Koki Wakunami, Lode Jorissen, Yasuyuki Ichihashi, Makoto Okui, Ryutaro Oi

Proceedings Volume 10557, 105570O (2018) https://doi.org/10.1117/12.2289091

KEYWORDS: Holograms, Holography, Holographic optical elements

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SPIE Journal Paper | 27 January 2018 Open Access

Open Access

Three-dimensional reflection screens fabricated by holographic wavefront printer

Ryutaro Oi, Ping-Yen Chou, Jackin Boaz Jessie , Koki Wakunami, Yasuyuki Ichihashi, Makoto Okui, Yi-Pai Huang, Kenji Yamamoto

OE, Vol. 57, Issue 06, 061605, (January 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.6.061605

KEYWORDS: Printing, Holograms, Wavefronts, 3D displays, 3D printing, Holography, Projection systems, Holographic optical elements, Spatial light modulators, Mirrors

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Proceedings Article | 6 April 2017 Presentation + Paper

Presentation + Paper

An analysis of printing conditions for wavefront overlapping printing

Y. Ichihashi, K. Yamamoto, K. Wakunami, R. Oi, M. Okui, T. Senoh

Proceedings Volume 10127, 101270L (2017) https://doi.org/10.1117/12.2251285

KEYWORDS: Wavefronts, Printing, 3D image reconstruction, Holograms, Holography, Spatial light modulators, Computer generated holography, Image analysis, LCDs, Image quality, Digital holography, Cameras, Image resolution, Light sources

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Proceedings Article | 1 June 2016 Paper

Paper

Wavefront printing technique with overlapping approach toward high definition holographic image reconstruction

K. Wakunami, R. Oi, T. Senoh, H. Sasaki, Y. Ichihashi, K. Yamamoto

Proceedings Volume 9867, 98670J (2016) https://doi.org/10.1117/12.2229517

KEYWORDS: Wavefronts, Printing, 3D image reconstruction, Holograms, Holography, Diffraction, Spatial light modulators, 3D acquisition, 3D image processing, 3D printing

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SPIE Journal Paper | 6 March 2014

Multiview image and depth map coding for holographic TV system

Takanori Senoh, Koki Wakunami, Yasuyuki Ichihashi, Hisayuki Sasaki, Ryutaro Oi, Kenji Yamamoto

OE, Vol. 53, Issue 11, 112302, (March 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.112302

KEYWORDS: Image compression, Holograms, Holography, 3D image reconstruction, Image quality, Image transmission, Cameras, Computer programming, Speckle, Optical engineering

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Proceedings Article | 25 February 2014 Paper

Paper

Viewing-zone-angle expansion of tiled color electronic holography reconstruction system

Takanori Senoh, Koki Wakunami, Yasuyuki Ichihashi, Hisayuki Sasaki, Ryutaro Oi, Kenji Yamamoto

Proceedings Volume 9006, 90060Z (2014) https://doi.org/10.1117/12.2035909

KEYWORDS: Spatial light modulators, Holograms, Holography, Light sources, Liquid crystal on silicon, Diffraction, Optical fibers, Camera shutters, Lenses, 3D image reconstruction

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Proceedings Article | 1 March 2013 Paper

Paper

Study of a holographic TV system based on multi-view images and depth maps

Takanori Senoh, Yasuyuki Ichihashi, Ryutaro Oi, Hisayuki Sasaki, Kenji Yamamoto

Proceedings Volume 8644, 86440A (2013) https://doi.org/10.1117/12.2000570

KEYWORDS: Holograms, Holography, Image compression, 3D image processing, 3D image reconstruction, Cameras, Computer generated holography, Computer programming, Error analysis, Digital holography

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Proceedings Article | 15 May 2012 Paper

Paper

3D visual systems using integral photography camera, camera array, and electronic holography display

Kenji Yamamoto, Yasuyuki Ichihashi, Takanori Senoh, Ryutaro Oi, Taiichiro Kurita

Proceedings Volume 8384, 838405 (2012) https://doi.org/10.1117/12.918315

KEYWORDS: Cameras, 3D displays, 3D image processing, 3D image reconstruction, Holograms, Photography, Holography, LCDs, Spatial filters, Visual system

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Proceedings Article | 21 February 2012 Paper

Paper

Color hologram generation using depth map of real objects with viewing-zone-angle expansion

Kosuke Nomura, Ryutaro Oi, Taiichiro Kurita, Takayuki Hamamoto

Proceedings Volume 8288, 82881U (2012) https://doi.org/10.1117/12.907724

KEYWORDS: Holograms, 3D image reconstruction, Diffraction, Cameras, Spatial light modulators, 3D image processing, Image resolution, Holography, 3D displays, Image processing

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Proceedings Article | 10 February 2012 Paper

Paper

Wide viewing-zone angle hologram generation using phase-shifting hologram capture for holographic media communications

Ryutaro Oi, Yasuyuki Ichihashi, Kenji Yamamoto, Takanori Senoh, Taiichiro Kurita

Proceedings Volume 8281, 828107 (2012) https://doi.org/10.1117/12.909536

KEYWORDS: Holograms, Phase shifts, Holography, Digital holography

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Proceedings Article | 20 May 2011 Paper

Paper

Development of electronic holography toward ultra-realistic communication

Kenji Yamamoto, Yasuyuki Ichihashi, Takanori Senoh, Ryutaro Oi, Taiichiro Kurita

Proceedings Volume 8043, 804312 (2011) https://doi.org/10.1117/12.883337

KEYWORDS: 3D image reconstruction, Holography, 3D image processing, Holograms, 3D displays, Image compression, Image visualization, Imaging systems, Cameras, Image processing

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Proceedings Article | 11 May 2011 Paper

Paper

Computer-generated hologram for 3D display from ray information on tilted surface

Kenji Yamamoto, Takanori Senoh, Ryutaro Oi, Yasuyuki Ichihashi, Taiichiro Kurita

Proceedings Volume 8074, 807406 (2011) https://doi.org/10.1117/12.886234

KEYWORDS: Computer generated holography, 3D displays, Holography, Computer graphics, Holograms, Current controlled current source, Wave propagation

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Proceedings Article | 7 February 2011 Paper

Paper

Wide viewing-zone-angle full-color electronic holography system using very high resolution liquid crystal display panels

Takanori Senoh, Tomoyuki Mishina, Kenji Yamamoto, Ryutaro Oi, Taiichiro Kurita

Proceedings Volume 7957, 795709 (2011) https://doi.org/10.1117/12.876763

KEYWORDS: Holograms, Holography, 3D image reconstruction, LCDs, Monochromatic aberrations, RGB color model, Time division multiplexing, Diffraction, Light sources, Light

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Proceedings Article | 7 February 2011 Paper

Paper

Holographic stereogram using camera array in dense arrangement

Kenji Yamamoto, Ryutaro Oi, Takanori Senoh, Yasuyuki Ichihashi, Taiichiro Kurita

Proceedings Volume 7957, 795703 (2011) https://doi.org/10.1117/12.873028

KEYWORDS: Cameras, Holography, Stereo holograms, 3D displays, Stereoscopic cameras, Holograms, Signal processing, Current controlled current source, Fourier transforms, Optical design

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Proceedings Article | 11 February 2010 Paper

Paper

Real-time color holography system for live scene using 4K2K video system

Kenji Yamamoto, Tomoyuki Mishina, Ryutaro Oi, Takanori Senoh, Taiichiro Kurita

Proceedings Volume 7619, 761906 (2010) https://doi.org/10.1117/12.840589

KEYWORDS: Holograms, 3D image reconstruction, Holography, 3D image processing, LCDs, 3D displays, Image processing, Wavefronts, Video, Cameras

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Proceedings Article | 11 February 2010 Paper

Paper

Fresnel hologram generation using an HD resolution depth range video camera

Ryutaro Oi, Tomoyuki Mishina, Kenji Yamamoto, Takanori Senoh, Taiichiro Kurita

Proceedings Volume 7619, 76190Z (2010) https://doi.org/10.1117/12.841817

KEYWORDS: Holograms, Cameras, 3D image reconstruction, Spatial light modulators, Video, Diffraction, Data conversion, Liquid crystal on silicon, Reconstruction algorithms, Image resolution

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Proceedings Article | 3 February 2009 Paper

Paper

Real-time IP–hologram conversion hardware based on floating point DSPs

Ryutaro Oi, Tomoyuki Mishina, Kenji Yamamoto, Makoto Okui

Proceedings Volume 7233, 723305 (2009) https://doi.org/10.1117/12.807612

KEYWORDS: Holograms, Digital signal processing, 3D image reconstruction, Lenses, Image processing, Photography, Field programmable gate arrays, Near field diffraction, Cameras, 3D image processing

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Proceedings Article | 3 February 2009 Paper

Paper

A real-time color holography system for live scene

Kenji Yamamoto, Tomoyuki Mishina, Ryutaro Oi, Takanori Senoh, Makoto Okui

Proceedings Volume 7233, 723310 (2009) https://doi.org/10.1117/12.807257

KEYWORDS: Holograms, 3D image reconstruction, Cameras, Holography, Video, 3D image processing, Image processing, LCDs, Laser sources, Optical filters

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Proceedings Article | 25 January 2008 Paper

Paper

Electronic generation of holograms by using depth maps of real scenes

Ryutaro Oi, Kenji Yamamoto, Makoto Okui

Proceedings Volume 6912, 69120M (2008) https://doi.org/10.1117/12.764144

KEYWORDS: Holograms, Spatial light modulators, Cameras, 3D image reconstruction, LCDs, Holography, Diffraction, Laser scanners, Near field diffraction, Reflectivity

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Proceedings Article | 25 January 2008 Paper

Paper

Half-zone-plate processing for objects on both sides of hologram display

Kenji Yamamoto, Ryutaro Oi, Tomoyuki Mishina, Makoto Okui

Proceedings Volume 6912, 69120Q (2008) https://doi.org/10.1117/12.762903

KEYWORDS: Holograms, Light sources, Spatial filters, Holography, Computer generated holography, LCDs, 3D image reconstruction, 3D image processing, Collimators, Electronic components

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Showing 5 of 26 publications

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