Dr. Toshiya Nakaguchi Profile

Dr. Toshiya Nakaguchi

at Chiba Univ

SPIE Involvement:

Author

Publications (38)

Proceedings Article | 20 April 2021 Paper

Color laparoscopic image region segmentation after contrast enhancement including SRCNN by image regions

Norifumi Kawabata, Toshiya Nakaguchi

Proceedings Volume 11792, 1179209 (2021) https://doi.org/10.1117/12.2590852

KEYWORDS: Image segmentation, Image processing, Super resolution, Image enhancement, Medical imaging, Image contrast enhancement, Laparoscopy, Image quality, 3D image enhancement, Video

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Proceedings Article | 5 March 2021 Presentation + Paper

Design of a system combining narrow band illuminants and a color camera for early diagnosis of skin flap necrosis

Yoko Kurabuchi, Kazuya Nakano, Takashi Ohnishi, Toshiya Nakaguchi, Shinsuke Akita, Markku Hauta-Kasari, Hideaki Haneishi

Proceedings Volume 11631, 116310R (2021) https://doi.org/10.1117/12.2576782

KEYWORDS: Skin, Imaging systems, Cameras, Tissues, Reflectivity, Surgery, RGB color model, Light emitting diodes, Blood circulation, Prototyping

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Proceedings Article | 21 February 2020 Presentation + Paper

Evaluation of the optimized surgical illuminant for enhancement of blood oxygen saturation

Yoko Kurabuchi, Kazuya Nakano, Takashi Ohnishi, Toshiya Nakaguchi, Markku Hauta-Kasari, Hideaki Haneishi

Proceedings Volume 11229, 1122912 (2020) https://doi.org/10.1117/12.2545675

KEYWORDS: Blood, Tissues, Arteries, Surgery, Light emitting diodes, Light sources, Absorption, Cameras

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Proceedings Article | 20 February 2018 Paper

In-vivo quantitative measurement of tissue oxygen saturation of human webbing using a transmission type continuous-wave near-infrared spectroscopy

Tuerxun Aizimu, Makoto Adachi, Kazuya Nakano, Takashi Ohnishi, Toshiya Nakaguchi, Nozomi Takahashi, Taka-aki Nakada, Shigeto Oda, Hideaki Haneishi

Proceedings Volume 10501, 105010P (2018) https://doi.org/10.1117/12.2291186

KEYWORDS: Absorbance, Oxygen, Tissues, Tissue optics, Near infrared spectroscopy, Continuous wave operation, Scattering, Spectroscopy, Light sources, Blood

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Proceedings Article | 8 February 2017 Paper

A new boundary correction method for lung parenchyma

Junfang Liang, Huiqin Jiang, Ling Ma, Yumin Liu, Nakaguchi Toshiya

Proceedings Volume 10225, 1022529 (2017) https://doi.org/10.1117/12.2266086

KEYWORDS: Lung, Image segmentation, Image enhancement, Visualization, Image compression, Image processing algorithms and systems, Computed tomography, Image filtering, Image contrast enhancement, Lung cancer

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Proceedings Article | 4 February 2013 Paper

Evaluation of biological effect on luminance of stereoscopic displays

Kyosuke Takahashi, Toshiya Nakaguchi, R. Okamoto, I. Shimoyama, Y. Miyake

Proceedings Volume 8653, 865308 (2013) https://doi.org/10.1117/12.2003290

KEYWORDS: Stereoscopic displays, Electrocardiography, Glasses, Optical testing, Camera shutters, Eye, Nerve, Image quality, Visualization, Optical spheres

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Proceedings Article | 17 May 2011 Paper

Security enhanced BioEncoding for protecting iris codes

Osama Ouda, Norimichi Tsumura, Toshiya Nakaguchi

Proceedings Volume 8029, 80291U (2011) https://doi.org/10.1117/12.883675

KEYWORDS: Iris, Biometrics, Iris recognition, Databases, Information security, Biological research, Resistance, Binary data, Computer security, Transform theory

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Proceedings Article | 14 March 2011 Paper

A liver segmentation approach in contrast-enhanced CT images with patient-specific knowledge

Ahmed Afifi, Toshiya Nakaguchi, Norimichi Tsumura

Proceedings Volume 7962, 796232 (2011) https://doi.org/10.1117/12.878742

KEYWORDS: Liver, Image segmentation, Computed tomography, Nonlinear filtering, Tissues, Statistical analysis, Tumors, Image filtering, Digital filtering, Data modeling

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Proceedings Article | 18 February 2011 Paper

Analysis on unevenness of skin color using the melanin and hemoglobin components separated by independent component analysis of skin color image

Nobutoshi Ojima, Izumi Fujiwara, Yayoi Inoue, Norimichi Tsumura, Toshiya Nakaguchi, Kayoko Iwata

Proceedings Volume 7897, 78971M (2011) https://doi.org/10.1117/12.873494

KEYWORDS: Skin, Chromophores, Independent component analysis, Spatial frequencies, Image analysis, Modulation, Image processing, Reflection, Image resolution, Quantitative analysis

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Proceedings Article | 12 February 2011 Paper

High-speed simulation of skin spectral reflectance based on an optical path-length matrix method and its application

Izumi Fujiwara, Satoshi Yamamoto, Midori Yamauchi, Keiko Ogawa-Ochiai, Toshiya Nakaguchi, Norimichi Tsumura

Proceedings Volume 7907, 79070K (2011) https://doi.org/10.1117/12.873750

KEYWORDS: Monte Carlo methods, Skin, Reflectivity, Tissue optics, Light scattering, Scattering, Absorption, Oxygen, Photon transport, Current controlled current source

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Proceedings Article | 24 January 2011 Paper

Feature-based automatic color calibration for networked camera system

Shoji Yamamoto, Keisuke Taki, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 7867, 78670G (2011) https://doi.org/10.1117/12.872335

KEYWORDS: Calibration, Cameras, Imaging systems, RGB color model, Computing systems, Signal detection, Video surveillance, Image quality, Algorithm development, Color difference

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SPIE Journal Paper | 1 January 2011

Photometric approach to surface reconstruction of artist paintings

Takayuki Hasegawa, Norimichi Tsumura, Toshiya Nakaguchi, Koichi Iino

JEI, Vol. 20, Issue 1, 013006, (January 2011) https://doi.org/10.1117/12.10.1117/1.3533329

KEYWORDS: Bidirectional reflectance transmission function, Light sources, Cameras, Sensors, Reflection, Specular reflections, Light sources and illumination, Photography, Optimization (mathematics), Reflectivity

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Proceedings Article | 13 March 2010 Paper

Segmentation of deformable organs from medical images using particle swarm optimization and nonlinear shape priors

Ahmed Afifi, Toshiya Nakaguchi, Norimichi Tsumura

Proceedings Volume 7623, 762349 (2010) https://doi.org/10.1117/12.844378

KEYWORDS: Image segmentation, Particle swarm optimization, Medical imaging, Liver, Computed tomography, Wavelet packet decomposition, Image processing algorithms and systems, Binary data, Wavelets, Image processing

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SPIE Journal Paper | 1 October 2009

Application of an imaging system to a museum exhibition for developing interactive exhibitions

Kimiyoshi Miyata, Yuka Inoue, Takahiro Takiguchi, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

JEI, Vol. 18, Issue 04, 043008, (October 2009) https://doi.org/10.1117/12.10.1117/1.3267085

KEYWORDS: Imaging systems, Projection systems, Cameras, Calibration, Imaging technologies, Human-machine interfaces, Digital cameras, Light sources and illumination, Augmented reality, Video

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Proceedings Article | 13 March 2009 Paper

Absolute length measurement using manually decided stereo correspondence for endoscopy

M. Sasaki, T. Koishi, T. Nakaguchi, N. Tsumura, Y. Miyake

Proceedings Volume 7261, 72610B (2009) https://doi.org/10.1117/12.811592

KEYWORDS: Endoscopy, Cameras, Sensors, Endoscopes, Calibration, Magnetic sensors, Magnetic tracking, Distortion, Magnetism, Photogrammetry

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Proceedings Article | 13 March 2009 Paper

Deformable hollow organ models with self-collision processing between inner surfaces

K. Nishimura, T. Koishi, T. Nakaguchi, S. Morita, N. Tsumura, Y. Miyake

Proceedings Volume 7261, 726127 (2009) https://doi.org/10.1117/12.811579

KEYWORDS: Finite element methods, Natural surfaces, Surgery, Solid modeling, Computer simulations, Systems modeling, Visualization, Virtual colonoscopy, Stomach, Intestine

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Proceedings Article | 3 February 2009 Paper

Fast hand recognition method using limited area of IR projection pattern

Shoji Yamamoto, Sayuri Kamimigaki, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 7251, 725103 (2009) https://doi.org/10.1117/12.805781

KEYWORDS: Image processing, Computer programming, Cameras, Displays, Projection systems, Infrared imaging, Distortion, Motion measurement, Visualization, Structured light

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Proceedings Article | 19 January 2009 Paper

The relationship between ambient illumination and psychological factors in viewing of display Images

Takuya Iwanami, Ayano Kikuchi, Takashi Kaneko, Keita Hirai, Natsumi Yano, Toshiya Nakaguchi, Norimichi Tsumura, Yasuhiro Yoshida, Yoichi Miyake

Proceedings Volume 7241, 72410L (2009) https://doi.org/10.1117/12.810118

KEYWORDS: Factor analysis, RGB color model, LED lighting, Illumination engineering, Video, Control systems, Image resolution, Image quality, Light sources and illumination, Psychology

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Proceedings Article | 19 January 2009 Paper

Improved video image by pixel-based learning for super-resolution

Kenji Kamimura, Norimichi Tsumura, Toshiya Nakaguchi, Hideto Motomura, Yoichi Miyake

Proceedings Volume 7242, 724217 (2009) https://doi.org/10.1117/12.810462

KEYWORDS: Super resolution, Video, Cameras, Image resolution, Sensors, Stationary wavelet transform, Image quality, Imaging systems, Image sensors, Spatial resolution

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Proceedings Article | 19 January 2009 Paper

Motion blur perception considering anisotropic contrast sensitivity of human visual system

Shinji Nakagawa, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 7242, 72421B (2009) https://doi.org/10.1117/12.810467

KEYWORDS: LCDs, Contrast sensitivity, Motion measurement, Visual system, Spatial frequencies, Image quality, Visualization, Anisotropy, Plasma display panels, CRTs

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Proceedings Article | 24 March 2008 Paper

A navigation system using projection images of laparoscopic instruments and a surgical target with improved image quality

Takeshi Koishi, Suguru Ushiki, Toshiya Nakaguchi, Hideki Hayashi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6918, 691810 (2008) https://doi.org/10.1117/12.770961

KEYWORDS: Laparoscopy, Surgery, Navigation systems, Sensors, Calibration, Projection systems, Cameras, Electromagnetism, Image quality, Distortion

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Proceedings Article | 17 March 2008 Paper

Quantitative evaluation of humeral head defects by comparing left and right feature

Shogo Kawasaki, Toshiya Nakaguchi, Nobuyasu Ochiai, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6915, 69153F (2008) https://doi.org/10.1117/12.770225

KEYWORDS: 3D modeling, Computed tomography, Head, Bone, Visualization, 3D image processing, Mirrors, Analytical research, Principal component analysis, Reverse modeling

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Proceedings Article | 17 March 2008 Paper

A fast stereo matching algorithm for 3D reconstruction of internal organs in laparoscopic surgery

Yoshimichi Okada, Takeshi Koishi, Suguru Ushiki, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6918, 69182K (2008) https://doi.org/10.1117/12.770818

KEYWORDS: Reconstruction algorithms, Laparoscopy, 3D modeling, Image registration, Cameras, Surgery, Optimization (mathematics), Stereoscopic cameras, Infrared imaging, 3D image processing

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Proceedings Article | 11 March 2008 Paper

Local control of speed function in level set segmentation using interactive interface for CT images

Shingo Tate, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 6914, 69143Z (2008) https://doi.org/10.1117/12.770736

KEYWORDS: Image segmentation, Computed tomography, 3D image processing, Optical spheres, Human-machine interfaces, Pancreas, 3D acquisition, 3D displays, Medical imaging, Computer aided diagnosis and therapy

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Proceedings Article | 25 February 2008 Paper

Efficient acquisition and rendering of transparent and refractive objects using quotient image

Keiichi Ochiai, Norimichi Tsumura, Toshiya Nakaguchi, Kimiyoshi Miyata, Yoichi Miyake

Proceedings Volume 6805, 680502 (2008) https://doi.org/10.1117/12.765860

KEYWORDS: Image compression, Image processing, CRTs, Image transmission, Transmittance, Cameras, Digital imaging, Transparency, Medical imaging, Structured light

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Proceedings Article | 28 January 2008 Paper

Motion blur perception in various conditions of presented edge

Shinji Nakagawa, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6808, 68080C (2008) https://doi.org/10.1117/12.766615

KEYWORDS: Anisotropy, Image quality, Motion measurement, Visualization, Video, LCDs, Contrast sensitivity, CRTs, Semantic video, Cameras

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Proceedings Article | 28 January 2008 Paper

Noise estimation from a single image taken by specific digital camera using a priori information

Hitomi Ito, Kenji Kamimura, Norimichi Tsumura, Toshiya Nakaguchi, Hideto Motomura, Yoichi Miyake

Proceedings Volume 6808, 68080D (2008) https://doi.org/10.1117/12.766941

KEYWORDS: Cameras, Image segmentation, Image analysis, Digital imaging, Cerium, CCD cameras, Image quality, Databases, Image compression, Computer simulations

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Proceedings Article | 28 January 2008 Paper

An application of projection imaging systems for museum exhibitions

Kimiyoshi Miyata, Takahiro Takiguchi, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6807, 68070L (2008) https://doi.org/10.1117/12.765785

KEYWORDS: Projection systems, Cameras, Imaging systems, Visualization, Calibration, Image processing, Light sources and illumination, Digital cameras, Augmented reality, Multimedia

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Proceedings Article | 3 April 2007 Paper

Six degree-of-freedom haptic rendering for the surgical incision training

Yasuhiro Kawaguchi, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6509, 65092R (2007) https://doi.org/10.1117/12.709324

KEYWORDS: Tissues, Haptic technology, Surgery, Instrument modeling, Data modeling, Computer simulations, Virtual reality, Control systems, Natural surfaces, Visualization

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Proceedings Article | 22 March 2007 Paper

Forceps insertion supporting system in laparoscopic surgery: image projection onto the abdominal surface

Takeshi Koishi, Suguru Ushiki, Toshiya Nakaguchi, Hideki Hayashi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6509, 65091Q (2007) https://doi.org/10.1117/12.709290

KEYWORDS: Surgery, Laparoscopy, Distortion, Projection systems, Abdomen, Image quality, Sensors, Medical imaging, Glasses, Natural surfaces

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Proceedings Article | 13 March 2006 Paper

Real-time deformations of organ based on structural mechanics for surgical simulators

Toshiya Nakaguchi, Masashi Tagaya, Nobuhiko Tamura, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 6143, 61432A (2006) https://doi.org/10.1117/12.654347

KEYWORDS: Surgery, Finite element methods, Mechanics, Laparoscopy, 3D modeling, Signal attenuation, Virtual reality, Liver, Computer simulations, Motion models

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Proceedings Article | 17 January 2006 Paper

Spectral based color reproduction for print illuminated by image projector

Kumiko Ueda, Shoji Yamamoto, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 6062, 60620I (2006) https://doi.org/10.1117/12.642811

KEYWORDS: Projection systems, Color difference, Color reproduction, Reflectivity, Control systems, Halftones, Displays, Printing, Digital imaging, CRTs

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Proceedings Article | 17 January 2006 Paper

An evaluation of sharpness in different image displays used for medical imaging

Masayuki Ukishima, Toshiya Nakaguchi, Katsushi Kato, Yoshikazu Fukuchi, Norimichi Tsumura, Kazumasa Matsumoto, Noriyuki Yanagawa, Takashi Ogura, Takashi Kikawa, Yoichi Miyake

Proceedings Volume 6059, 60590C (2006) https://doi.org/10.1117/12.642590

KEYWORDS: Modulation transfer functions, Imaging systems, LCDs, X-rays, CRTs, X-ray imaging, Image processing, Medical imaging, Silver, Image quality

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Proceedings Article | 17 January 2006 Paper

Designing flat-bed scanning system for spectral and glossiness recording

Takahiro Takiguchi, Sachiko Abe, Norimichi Tsumura, Toshiya Nakaguchi, Fumio Nakaya, Hirokazu Ichikawa, Yuji Minato, Kimiyoshi Miyata, Yoichi Miyake

Proceedings Volume 6062, 60620D (2006) https://doi.org/10.1117/12.642837

KEYWORDS: Reflectivity, Light sources, Optical filters, Scanners, Image analysis, Computer simulations, Diffuse reflectance spectroscopy, Image processing, Imaging systems, Image filtering

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Proceedings Article | 25 April 2005 Paper

Quantification method for the appearance of melanin pigmentation using independent component analysis

Nobutoshi Ojima, Natsuko Okiyama, Saya Okaguchi, Norimichi Tsumura, Toshiya Nakaguchi, Kimihiko Hori, Yoichi Miyake

Proceedings Volume 5686, (2005) https://doi.org/10.1117/12.589611

KEYWORDS: Skin, Independent component analysis, Chromophores, Image analysis, Reflection, Image filtering, Imaging systems, Light sources and illumination, Electronic filtering, Digital cameras

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Proceedings Article | 17 January 2005 Paper

Virtual mirror based on 3D-shape reconstruction and real-time face tracking

Takao Makino, Toshiya Nakaguchi, Norimichi Tsumura, Yoichi Miyake

Proceedings Volume 5670, (2005) https://doi.org/10.1117/12.585841

KEYWORDS: 3D image processing, Mirrors, 3D acquisition, Laser induced plasma spectroscopy, Filtering (signal processing), Neck, 3D image reconstruction, Cameras, Light sources, Motion estimation

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Proceedings Article | 17 January 2005 Paper

Evaluation and analysis for spectral reflectance imaging of human skin

Kenji Kamimura, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 5667, (2005) https://doi.org/10.1117/12.585740

KEYWORDS: Reflectivity, Skin, Imaging systems, Light sources, Cameras, RGB color model, Optical filters, Image analysis, Modulation, Principal component analysis

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Proceedings Article | 17 January 2005 Paper

Development of multispectral scanner by using LEDs array for digital color proof

Shouji Yamamoto, Norimichi Tsumura, Toshiya Nakaguchi, Yoichi Miyake

Proceedings Volume 5668, (2005) https://doi.org/10.1117/12.585692

KEYWORDS: Light emitting diodes, Reflectivity, Color difference, Scanners, Statistical analysis, Printing, Sensors, Error analysis, Photodiodes, Chemical elements

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Showing 5 of 38 publications

Conference Committee Involvement (3)

Image Quality and System Performance XII

10 February 2015 | San Francisco, California, United States

Image Quality and System Performance XI

3 February 2014 | San Francisco, California, United States

Image Quality and System Performance X

5 February 2013 | Burlingame, California, United States

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