Prof. Sumio Nakahara Profile

Prof. Sumio Nakahara

Associate Professor at Kansai Univ

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 6 April 2017 Paper

Full-color high-definition CGH reconstructing hybrid scenes of physical and virtual objects

Yasuhiro Tsuchiyama, Kyoji Matsushima, Sumio Nakahara, Masahiro Yamaguchi, Yuji Sakamoto

Proceedings Volume 10127, 101270Y (2017) https://doi.org/10.1117/12.2251414

KEYWORDS: Holography, Computer generated holography, Optical filters, RGB color model, Fringe analysis, Remote sensing, 3D image reconstruction, 3D image processing, Light emitting diodes, Light sources

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Proceedings Article | 23 September 2015 Paper

Computer holography as an application of computational optics

Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 9630, 963010 (2015) https://doi.org/10.1117/12.2197470

KEYWORDS: Computer generated holography, Holography, Holograms, Computational imaging, Light wave propagation, 3D image processing, Image segmentation, Light, Diffusers, 3D modeling

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Proceedings Article | 10 March 2015 Paper

Optimization of the switch-back technique used for fast occlusion-processing in computer holography

Sachio Masuda, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 9386, 93860L (2015) https://doi.org/10.1117/12.2075998

KEYWORDS: Diffraction, Holograms, 3D modeling, Holography, Computer generated holography, Time metrology, Photomasks, 3D image processing, Wave propagation, Switches

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Proceedings Article | 10 March 2015 Paper

Optimization of design-wavelength for unobtrusive chromatic aberration in high-definition color computer holography

Takashi Miyaoka, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 9386, 93860N (2015) https://doi.org/10.1117/12.2076876

KEYWORDS: Computer generated holography, 3D image reconstruction, Chromatic aberrations, Mirrors, Holography, Light sources, Fringe analysis, Optical design, Light emitting diodes, RGB color model

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Proceedings Article | 25 February 2014 Paper

Techniques for applying rigorous light-shielding to high-definition computer holography

Sachio Masuda, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 9006, 90061G (2014) https://doi.org/10.1117/12.2039216

KEYWORDS: Holography, Computer generated holography, Holograms, 3D modeling, Diffraction, 3D image reconstruction, Time metrology, Photomasks, Optical spheres, Fourier transforms

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SPIE Journal Paper | 26 April 2012 Open Access

Simple wave-field rendering for photorealistic reconstruction in polygon-based high-definition computer holography

Kyoji Matsushima, Hirohito Nishi, Sumio Nakahara

JEI, Vol. 21, Issue 2, 023002, (April 2012) https://doi.org/10.1117/12.10.1117/1.JEI.21.2.023002

KEYWORDS: Holograms, 3D image processing, Holography, Light, Volume rendering, Optical spheres, Fringe analysis, Video, Computer graphics, 3D scanning

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Proceedings Article | 10 February 2012 Paper

Fabrication of the multi-level phase type hologram for display using the laser direct write lithography system

Seiji Nakano, Sumio Nakahara, Shoso Singubara

Proceedings Volume 8281, 828116 (2012) https://doi.org/10.1117/12.909826

KEYWORDS: Holograms, Direct write lithography, Diffractive optical elements, Laser based displays, Holographic optical elements, Computer generated holography, 3D image reconstruction, Image restoration, Optical testing, Diffraction

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Proceedings Article | 10 February 2012 Paper

Image-type high-definition CGHs encoded by optimized error diffusion

Hiroshi Yamashita, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 8281, 82810Z (2012) https://doi.org/10.1117/12.908353

KEYWORDS: Computer generated holography, Diffusion, Binary data, 3D image reconstruction, Lithography, Laser systems engineering, Holograms, Computer programming, Light sources, Chromatic aberrations

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Proceedings Article | 10 February 2012 Paper

Advanced rendering techniques for producing specular smooth surfaces in polygon-based high-definition computer holography

Hirohito Nishi, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 8281, 828110 (2012) https://doi.org/10.1117/12.908871

KEYWORDS: Holography, Image segmentation, 3D image reconstruction, 3D image processing, Diffusers, Light sources and illumination, Computer generated holography, Fabrication

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Proceedings Article | 20 May 2011 Paper

Digitized holography: spatial 3D imaging of virtual and real objects

Kyoji Matsushima, Yasuaki Arima, Sumio Nakahara

Proceedings Volume 8043, 804307 (2011) https://doi.org/10.1117/12.884371

KEYWORDS: Holography, Holograms, 3D image processing, 3D image reconstruction, Image sensors, Digital holography, Sensors, Light, Computer generated holography, Image processing

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Proceedings Article | 7 February 2011 Paper

New techniques for wave-field rendering of polygon-based high-definition CGHs

Hirohito Nishi, Kentaro Higashi, Yasuaki Arima, Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 7957, 79571A (2011) https://doi.org/10.1117/12.876362

KEYWORDS: Computer generated holography, Holography, 3D image reconstruction, 3D image processing, Digital holography, 3D metrology, Venus, 3D scanning, Reflection, Photography

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Proceedings Article | 11 February 2010 Paper

High-definition full-parallax CGHs created by using the polygon-based method and the shifted angular spectrum method

Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 7619, 761913 (2010) https://doi.org/10.1117/12.844606

KEYWORDS: Computer generated holography, Image segmentation, Holograms, Venus, Holography, Current controlled current source

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Proceedings Article | 3 February 2009 Paper

Region segmentation and parallel processing for creating large-scale CGHs in polygon source method

Kyoji Matsushima, Sumio Nakahara

Proceedings Volume 7233, 72330E (2009) https://doi.org/10.1117/12.808633

KEYWORDS: Holograms, Computer generated holography, Venus, Image segmentation, Wave propagation, Parallel processing, 3D image reconstruction, Light, Digital holography, Light wave propagation

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Proceedings Article | 8 October 2004 Paper

Laser soldering of Sn-Ag-Cu and Sn-Zn-Bi lead-free solder pastes

Junichi Takahashi, Sumio Nakahara, Shigeyoshi Hisada, Takeyoshi Fujita

Proceedings Volume 5662, (2004) https://doi.org/10.1117/12.596344

KEYWORDS: Laser welding, Semiconductor lasers, YAG lasers, Optical inspection, Lead, Electronics, Copper, Printed circuit board testing, Injuries, Glasses

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Proceedings Article | 17 October 2003 Paper

Direct laser marking on ROM media for identification

Sumio Nakahara, Yoshihiro Okino, Masaaki Takita, Shigeyoshi Hisada, Takeyoshi Fujita

Proceedings Volume 4977, (2003) https://doi.org/10.1117/12.479540

KEYWORDS: Laser marking, Aluminum, Thin films, Scanning electron microscopy, Compact discs, Semiconductor lasers, Laser processing, Atomic force microscopy, Argon ion lasers, Ion lasers

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Proceedings Article | 25 February 2002 Paper

Uniformity initialization optical system for phase-change optical disk

Masaaki Takita, Yoshihiro Okino, Sumio Nakahara

Proceedings Volume 4426, (2002) https://doi.org/10.1117/12.456907

KEYWORDS: Optical discs, Semiconductor lasers, Mirrors, Head, Luminescence, Near field, Optics manufacturing, Crystals, High power lasers, Lasers

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Proceedings Article | 25 February 2002 Paper

Holographic optical element for laser soldering

Sumio Nakahara, Tatsuya Hayashi, Noriyuki Sudou, Shigeyoshi Hisada, Takeyoshi Fujita

Proceedings Volume 4426, (2002) https://doi.org/10.1117/12.456804

KEYWORDS: Holograms, Diffraction, YAG lasers, Photography, Silver, Holographic optical elements, Laser welding, Holography, Helium neon lasers, Absorption

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Proceedings Article | 7 February 2001 Paper

Initializer for phase-change optical media

Yoshihiro Okino, Sumio Nakahara, Masaaki Takita

Proceedings Volume 4085, (2001) https://doi.org/10.1117/12.416828

KEYWORDS: Crystals, Near field optics, Near field, Semiconductor lasers, Optical discs, High power lasers, Standards development, Laser processing, Head, Laser crystals

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Proceedings Article | 6 November 2000 Paper

Microsoldering using a YAG laser: on lead-free solder

Sumio Nakahara, Tatsuya Kamata, Noriyuki Yoneda, Shigeyoshi Hisada, Takeyoshi Fujita

Proceedings Volume 4088, (2000) https://doi.org/10.1117/12.405756

KEYWORDS: Laser welding, YAG lasers, Copper, Temperature metrology, Capacitors, Printed circuit board testing, Glasses, Laser irradiation, Optical inspection, Epoxies

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