Prof. Tomoyoshi Shimobaba Profile

Prof. Tomoyoshi Shimobaba

Professor at Chiba Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (31)

Proceedings Article | 23 November 2024 Paper

A comprehensive evaluation of polygon-based hologram algorithms

Fan Wang, Pin Wang, Yaping Zhang, David Blinder, Anuj Gupta, Ting-Chung Poon, Tomoyoshi Ito, Tomoyoshi Shimobaba

Proceedings Volume 13240, 1324003 (2024) https://doi.org/10.1117/12.3036200

KEYWORDS: Holograms, Computer generated holography, Algorithm development, Reconstruction algorithms, Light sources and illumination, Interpolation, Fluctuations and noise, 3D displays, 3D acquisition, Testing and analysis

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Proceedings Article | 18 June 2024 Poster + Paper

Suppression of ringing artifacts in diffraction calculations

Tomoyoshi Shimobaba, Fan Wang, Yogi Udjaja, Takashi Nishitsuji, Atsushi Shiraki, Tomoyoshi Ito

Proceedings Volume 12998, 129981T (2024) https://doi.org/10.1117/12.3026635

KEYWORDS: Diffraction, Windows, Fourier transforms, Convolution, Optical components, Holography, Design, Computer science, Visualization, Operating systems

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Proceedings Article | 18 June 2024 Presentation + Paper

Asymmetric point-spread functions for slanted wavefront recording planes

Fan Wang, David Blinder, Tomoyoshi Ito, Tomoyoshi Shimobaba

Proceedings Volume 12998, 129980E (2024) https://doi.org/10.1117/12.3022264

KEYWORDS: Point spread functions, Wavefronts, Wave propagation, Computer generated holography, Geometrical optics

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Proceedings Article | 18 June 2024 Presentation + Paper

Joint color optimization for computer-generated holography without color replicas

David Blinder, Fan Wang, Colas Schretter, Takashi Kakue, Tomoyoshi Shimobaba, Peter Schelkens

Proceedings Volume 12998, 129980G (2024) https://doi.org/10.1117/12.3022244

KEYWORDS: Nonlinear optimization, Spatial light modulators, Color, Light sources and illumination, Computer generated holography, Zone plates, Holographic displays, Holograms, Cameras

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Proceedings Article | 28 November 2023 Paper

Advances in computer-generated hologram for rendering and acceleration based on the point-polygon hybrid method

Fan Wang, David Blinder, Tomoyoshi Ito, Tomoyoshi Shimobaba

Proceedings Volume 12765, 1276508 (2023) https://doi.org/10.1117/12.2684721

KEYWORDS: Computer generated holography, Holograms, 3D modeling, Wavefronts, Volume rendering, Point clouds, Light wave propagation, Interpolation, Fourier transforms, Depth maps

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Proceedings Article | 27 November 2023 Paper

Fast calculation techniques of computer-generated hologram for line-drawn 3D objects

Takashi Nishitsuji, David Blinder, Tomoyoshi Shimobaba, Takashi Kakue, Peter Schelkens, Tomoyoshi Ito

Proceedings Volume 12768, 1276803 (2023) https://doi.org/10.1117/12.2686940

KEYWORDS: Wavefronts, Computer generated holography, Graphics processing units, Computer graphics

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SPIE Journal Paper | 9 August 2023 Open Access

High-performance computer system dedicated to ray-wavefront conversion technique aimed to display holograms in real-time

Tatsuya Maruyama, Yasuyuki Ichihashi, Ikuo Hoshi, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 62, Issue 08, 085102, (August 2023) https://doi.org/10.1117/12.10.1117/1.OE.62.8.085102

KEYWORDS: Holograms, Computing systems, Field programmable gate arrays, 3D image reconstruction, Wavefronts, Light wave propagation, 3D image processing, Holography, Optical engineering, Data conversion

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Proceedings Article | 19 December 2022 Presentation + Paper

Strategies for the next generation of special-purpose computers for holography

Tomoyoshi Shimobaba, Takayuki Takahashi, Ikuo Hoshi, Fan Wang, Harutaka Shiomi, Takayuki Hara, Yogi Udjaja, Taira Suzuki, Takashi Nishitsuji, Takashi Kakue, Atsushi Shiraki, Tomoyoshi Ito

Proceedings Volume 12318, 123181U (2022) https://doi.org/10.1117/12.2642406

KEYWORDS: Holograms, Computing systems, Holography, 3D image reconstruction, Field programmable gate arrays

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SPIE Journal Paper | 28 May 2020 Open Access

Special-purpose computer for digital holographic high-speed three-dimensional imaging

Yota Yamamoto, Shintaro Namba, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito, Nobuyuki Masuda

OE, Vol. 59, Issue 05, 054105, (May 2020) https://doi.org/10.1117/12.10.1117/1.OE.59.5.054105

KEYWORDS: Digital holography, Holograms, 3D image reconstruction, Holography, Field programmable gate arrays, Fourier transforms, 3D image processing, Optical engineering, Stereoscopy, Convolution

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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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Proceedings Article | 1 April 2020 Presentation + Paper

Hologram calculation in sparse Fourier bases using fixed-point operations, and its circuit architecture

Daiki Yasuki, David Blinder, Tomoyoshi Shimobaba, Peter Schelkens, Takashi Kakue, Tomoyoshi Ito

Proceedings Volume 11353, 1135305 (2020) https://doi.org/10.1117/12.2555262

KEYWORDS: Computer generated holography, Field programmable gate arrays, Holograms, Point spread functions, Image quality, Fourier transforms, Clouds, Computing systems, Holography, 3D image processing

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Proceedings Article | 1 April 2020 Presentation + Paper

Improvement of image quality of phase-only hologram using random phase-free method: verification by simulation and optical experiments

Yumi Yamaguchi, Yuki Nagahama, Yota Yamamoto, Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito

Proceedings Volume 11353, 113530P (2020) https://doi.org/10.1117/12.2554240

KEYWORDS: Holograms, Computer generated holography, 3D image reconstruction, Diffraction, Image quality, Optical simulations, Speckle

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Proceedings Article | 14 May 2019 Presentation + Paper

Dedicated computer for computer holography and its future outlook

Takashi Nishitsuji, Yota Yamamoto, Takashige Sugie, Takashi Kakue, Hirotaka Nakayama, Tomoyoshi Shimobaba, Tomoyoshi Ito

Proceedings Volume 10997, 109970H (2019) https://doi.org/10.1117/12.2522569

KEYWORDS: Computer generated holography, 3D modeling, 3D displays, Field programmable gate arrays, 3D image processing, Computing systems, Holography, 3D image reconstruction, Visualization, Telecommunications

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Proceedings Article | 15 November 2018 Paper

Fast hologram calculation using wavelet transform

Tomoyoshi Shimobaba, Shota Yamada, Takashi Kakue, Tomoyoshi Ito

Proceedings Volume 10964, 109642I (2018) https://doi.org/10.1117/12.2505810

KEYWORDS: Holograms, Point spread functions, Wavelets, 3D image reconstruction, Superposition, Wavelet transforms, Clouds, Holography, 3D displays, Diffraction

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SPIE Journal Paper | 30 May 2018 Open Access

Review of real-time reconstruction techniques for aerial-projection holographic displays

Takashi Kakue, Yoshiya Wagatsuma, Shota Yamada, Takashi Nishitsuji, Yutaka Endo, Yuki Nagahama, Ryuji Hirayama, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 57, Issue 06, 061621, (May 2018) https://doi.org/10.1117/12.10.1117/1.OE.57.6.061621

KEYWORDS: Computer generated holography, Holograms, Holography, 3D image processing, Spatial light modulators, Mirrors, 3D image reconstruction, Displays, 3D displays, Diffraction

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SPIE Journal Paper | 25 July 2017 Open Access

Operating scheme for the light-emitting diode array of a volumetric display that exhibits multiple full-color dynamic images

Ryuji Hirayama, Atsushi Shiraki, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 56, Issue 07, 073108, (July 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.7.073108

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SPIE Journal Paper | 24 February 2017

Gradation representation method using binary-weighted computer-generated hologram

Masato Fujiwara, Naoki Takada, Hiromitsu Araki, Shohei Ikawa, Hiroaki Niwase, Yuki Maeda, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 56, Issue 02, 023105, (February 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.2.023105

KEYWORDS: Computer generated holography, 3D image reconstruction, 3D image processing, Binary data, 3D modeling, Holography, Holograms, 3D displays, Spatial light modulators, LCDs

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Proceedings Article | 22 February 2017 Presentation + Paper

High-speed stimulated Raman scattering microscopy for studying the metabolic diversity of motile Euglena gracilis

Y. Suzuki, Y. Wakisaka, O. Iwata, A. Nakashima, T. Ito, M. Hirose, R. Domon, M. Sugawara, N. Tsumura, H. Watarai, T. Shimobaba, K. Suzuki, K. Goda, Y. Ozeki

Proceedings Volume 10076, 1007604 (2017) https://doi.org/10.1117/12.2250455

KEYWORDS: Raman scattering, Chemical analysis, Microscopy, Biofuels, Spectroscopy, Image acquisition, High speed imaging, Raman spectroscopy, Imaging systems, Microscopes, Imaging spectroscopy, Optical spectroscopy

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SPIE Journal Paper | 28 September 2016

Real-time electroholography using a multiple-graphics processing unit cluster system with a single spatial light modulator and the InfiniBand network

Hiroaki Niwase, Naoki Takada, Hiromitsu Araki, Yuki Maeda, Masato Fujiwara, Hirotaka Nakayama, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 55, Issue 09, 093108, (September 2016) https://doi.org/10.1117/12.10.1117/1.OE.55.9.093108

KEYWORDS: Computer generated holography, Spatial light modulators, Computing systems, Data storage, LCDs, 3D displays, Binary data, Holography, Holograms, Optical engineering

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Proceedings Article | 28 June 2016 Presentation

Label-free chemical imaging of live Euglena gracilis by high-speed SRS spectral microscopy (Conference Presentation)

Yoshifumi Wakisaka, Yuta Suzuki, Kyoya Tokunaga, Misa Hirose, Ryota Domon, Rina Akaho, Mai Kuroshima, Norimichi Tsumura, Tomoyoshi Shimobaba, Osamu Iwata, Kengo Suzuki, Ayaka Nakashima, Keisuke Goda, Yasuyuki Ozeki

Proceedings Volume 9720, 97200H (2016) https://doi.org/10.1117/12.2211991

KEYWORDS: Microorganisms, Imaging spectroscopy, Microscopy, Chemical analysis, Biofuels, High speed imaging, Raman scattering, Visualization, Tissues, Temporal resolution

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Proceedings Article | 1 June 2016 Paper

Random phase-free computer holography and its applications

Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito

Proceedings Volume 9867, 98670M (2016) https://doi.org/10.1117/12.2229729

KEYWORDS: Holography, Speckle, Computer generated holography, 3D image reconstruction, Image quality, Holograms, Image resolution, Iterative methods, Spatial light modulators, Diffraction

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Proceedings Article | 7 March 2016 Paper

A computational approach to real-time image processing for serial time-encoded amplified microscopy

Minoru Oikawa, Daisuke Hiyama, Ryuji Hirayama, Satoki Hasegawa, Yutaka Endo, Takahisa Sugie, Norimichi Tsumura, Mai Kuroshima, Masanori Maki, Genki Okada, Cheng Lei, Yasuyuki Ozeki, Keisuke Goda, Tomoyoshi Shimobaba

Proceedings Volume 9720, 97200E (2016) https://doi.org/10.1117/12.2211646

KEYWORDS: Field programmable gate arrays, Microscopy, Image processing, Real time image processing, Optical imaging, Imaging systems, Cameras, Particles, Image resolution, Digital signal processing, Prototyping

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Proceedings Article | 22 May 2015 Paper

Color reconstruction of computer-generated hologram for real scenes using a light field camera

Yutaka Endo, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

Proceedings Volume 9495, 949514 (2015) https://doi.org/10.1117/12.2176912

KEYWORDS: Computer generated holography, Cameras, Remote sensing, 3D image reconstruction, Image sensors, 3D image processing, 3D displays, Integral imaging, Fourier transforms, Imaging systems

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Proceedings Article | 22 May 2015 Paper

High-speed parallel phase-shifting digital holography system using special-purpose computer for image reconstruction

Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

Proceedings Volume 9495, 94950N (2015) https://doi.org/10.1117/12.2177519

KEYWORDS: Digital holography, Phase shifts, Holograms, Phase interferometry, Computing systems, Image processing, Optical design, Field programmable gate arrays, Computer simulations, Holographic interferometry

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Proceedings Article | 13 November 2014 Paper

Estimation of vibration frequency of loudspeaker diaphragm by parallel phase-shifting digital holography

T. Kakue, Y. Endo, T. Shimobaba, T. Ito

Proceedings Volume 9279, 92790V (2014) https://doi.org/10.1117/12.2073659

KEYWORDS: Digital holography, Phase shifts, Cameras, Holograms, Phase interferometry, Holographic interferometry, Polarization, 3D image reconstruction, High speed cameras, Vibrometry

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SPIE Journal Paper | 6 November 2014

Acceleration of computer-generated hologram by Greatly Reduced Array of Processor Element with Data Reduction

Atsushi Sugiyama, Nobuyuki Masuda, Minoru Oikawa, Naohisa Okada, Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

OE, Vol. 53, Issue 11, 113104, (November 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.11.113104

KEYWORDS: Computer generated holography, Data processing, Holograms, Array processing, Computing systems, Parallel computing, 3D image processing, Astronomy, Holography, 3D displays

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Proceedings Article | 5 June 2014 Paper

Acceleration of color computer-generated hologram from three-dimensional scenes with texture and depth information

Tomoyoshi Shimobaba, Takashi Kakue, Tomoyoshi Ito

Proceedings Volume 9117, 91170B (2014) https://doi.org/10.1117/12.2049675

KEYWORDS: Computer generated holography, RGB color model, Diffraction, 3D image processing, Chromium, Near field diffraction, 3D displays, Visualization, 3D image reconstruction, Cameras

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Proceedings Article | 5 June 2014 Paper

Volumetric display containing multiple two-dimensional color motion pictures

R. Hirayama, A. Shiraki, H. Nakayama, T. Kakue, T. Shimobaba, T. Ito

Proceedings Volume 9117, 911717 (2014) https://doi.org/10.1117/12.2050246

KEYWORDS: Light emitting diodes, Projection systems, 3D displays, Algorithm development, Numerical simulations, Crystals, Prototyping, RGB color model, Light sources and illumination

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SPIE Journal Paper | 28 February 2014

Calculation reduction method for color digital holography and computer-generated hologram using color space conversion

Tomoyoshi Shimobaba, Yuki Nagahama, Takashi Kakue, Naoki Takada, Naohisa Okada, Yutaka Endo, Ryuji Hirayama, Daisuke Hiyama, Tomoyoshi Ito

OE, Vol. 53, Issue 02, 024108, (February 2014) https://doi.org/10.1117/12.10.1117/1.OE.53.2.024108

KEYWORDS: Computer generated holography, RGB color model, 3D image reconstruction, Holograms, Diffraction, Chromium, Digital holography, 3D image processing, Spatial light modulators, 3D displays

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Proceedings Article | 31 December 2013 Paper

Special-purpose computer for real-time reconstruction of holographic motion picture

Takashi Kakue, Nobuyuki Masuda, Yutaka Endo, Ryuji Hirayama, Naohisa Okada, Tomoyoshi Shimobaba, Tomoyoshi Ito

Proceedings Volume 9042, 90420B (2013) https://doi.org/10.1117/12.2037630

KEYWORDS: Computer generated holography, Holography, Holograms, LCDs, Copper, Spatial light modulators, 3D image reconstruction, Field programmable gate arrays, Visualization, Human-machine interfaces

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Proceedings Article | 12 April 2005 Paper

Electroholography unit for three-dimensional display using special-purpose chip and high minute LCD panel

Tomoyoshi Shimobaba, Atushi Shiraki, Nobuyuki Masuda, Tomoyoshi Ito

Proceedings Volume 5852, (2005) https://doi.org/10.1117/12.621493

KEYWORDS: LCDs, Computer generated holography, Holography, 3D displays, Reflectivity, Copper, Clocks, Holograms, Field programmable gate arrays, 3D image processing

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