Dr. Keita Hirai Profile

Dr. Keita Hirai

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 3 February 2014 Paper

Spectral analysis of omnidirectional color signals in natural scenes

Shoji Tominaga, Daiki Watanabe, Keita Hirai, Takahiko Horiuchi

Proceedings Volume 9015, 901503 (2014) https://doi.org/10.1117/12.2039592

KEYWORDS: Imaging systems, Principal component analysis, Cameras, Light sources, Data compression, Optical filters, Interference (communication), Image resolution, Reliability, Signal analyzers

Read Abstract +

Proceedings Article | 4 February 2013 Paper

Metal-dielectric object classification by combining polarization property and surface spectral reflectance

Shoji Tominaga, Hideki Kadoi, Keita Hirai, Takahiko Horiuchi

Proceedings Volume 8652, 86520E (2013) https://doi.org/10.1117/12.2005638

KEYWORDS: Image segmentation, Dielectric polarization, Reflectivity, Dielectrics, Metals, Imaging systems, Image classification, Image processing algorithms and systems, Detection and tracking algorithms, Optical filters

Read Abstract +

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

Read Abstract +

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years