Dr. Koki Wakunami Profile

Dr. Koki Wakunami

at NICT

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 13 March 2024 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 | 10 October 2020 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

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

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

View synthesis from sparse camera array for pop-out rendering on hologram displays

Lode Jorissen, Jackin Boaz Jessie , Koki Wakunami, Kenji Yamamoto, Gauthier Lafruit, Philippe Bekaert

Proceedings Volume 10558, 105580K (2018) https://doi.org/10.1117/12.2288826

KEYWORDS: 3D modeling, Holograms, Holography, Visualization, Reconstruction algorithms, Visual process modeling

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Proceedings Article | 19 February 2018 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

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

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

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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Proceedings Article | 22 May 2015 Paper

Reconstruct holographic 3D objects by double phase hologram

Chih-Hung Ting, Koki Wakunami, Kenji Yamamoto, Yi-Pai Huang

Proceedings Volume 9495, 94950V (2015) https://doi.org/10.1117/12.2184376

KEYWORDS: 3D displays, Holograms, Holography, Phase shift keying, Modulation, 3D image processing, 3D image reconstruction, Fringe analysis, Computer generated holography, Light sources

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Proceedings Article | 5 June 2014 Paper

Three-dimensional holographic display using dense ray sampling and integral imaging

Xiao Xiao, Koki Wakunami, Jeho Nam, Jinwoong Kim, Bahram Javidi

Proceedings Volume 9117, 91170R (2014) https://doi.org/10.1117/12.2050695

KEYWORDS: Computer generated holography, Integral imaging, Holography, Image resolution, 3D image processing, 3D displays, Image processing, Holograms, Diffraction, Remote sensing

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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

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 | 15 May 2012 Paper

Computer generated hologram of deep 3D scene from the data captured by integral imaging

Koki Wakunami, Masahiro Yamaguchi, Bahram Javidi

Proceedings Volume 8384, 83841B (2012) https://doi.org/10.1117/12.927453

KEYWORDS: Computer generated holography, Integral imaging, 3D image processing, 3D displays, Digital holography, Image resolution, Remote sensing, Visualization, Holography, 3D acquisition

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Proceedings Article | 11 February 2010 Paper

Calculation of computer-generated hologram for 3D display using light-ray sampling plane

K. Wakunami, M. Yamaguchi

Proceedings Volume 7619, 76190A (2010) https://doi.org/10.1117/12.843149

KEYWORDS: Computer generated holography, Remote sensing, Image resolution, 3D image reconstruction, Holograms, Wavefronts, Diffraction, 3D displays, Cameras, 3D image processing

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Showing 5 of 15 publications

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