OKAJIMA Katsunori

Organization

Faculty of Environment and Information Sciences, Division of Social Environment and Information

Title

Professor

Research Fields, Keywords

Vision and Brain Sciences, Psychophysics, Image Processing, Virtual Reality, Computer Graphics

Mail Address

E-mail address



写真a

Graduate School 【 display / non-display

  •  
    -
    1990

    Tokyo Institute of Technology  Graduate School, Division of Integrated Science and Engineering  Department of Information Processing  Doctor Course  Completed

  •  
    -
    1987

    Tokyo Institute of Technology  Graduate School, Division of Integrated Science and Engineering  Department of Information Processing  Master Course  Completed

Degree 【 display / non-display

  • Doctor of Engineering -  Tokyo Institute of Technology

External Career 【 display / non-display

  • 2004.06
    -
    2006.03

    National Institute of Information and Communications Technology   Research Fellow  

  • 2003.04
    -
    2004.03

    Telecommunications Advancement Organization of Japan   Research Fellow  

  • 2001.11
    -
    2003.10

    Tokyo Institute of Technology   Visiting Associate Professor  

  • 1995.10
    -
    2004.03

    National Defense Academy   Associate Professor (as old post name)  

  • 1992.04
    -
    1993.03

    National Research Council Canada   Visiting Researcher  

display all >>

Academic Society Affiliations 【 display / non-display

  • 1990
     
     
     

    Vision Society of Japan

  • 2013.04
     
     
     

    International Colour Vision Society

  • 1999.04
     
     
     

    Virtual Reality Society of Japan

  • 1993.01
     
     
     

    Optical Society of America

  • 1990.04
     
     
     

    Color Science Association of Japan

display all >>

Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display

  • Kansei informatics

  • Rehabilitation science/Welfare engineering

  • Perceptual information processing

 

Research Career 【 display / non-display

  • Basic research on perception mechanism and auto-generation of material texture

    Project Year:  -   

  • Basic research and application of human sensor-fusion mechanism

    Project Year:  -   

  • Basic research and applications on human color recognition mechanism

    Project Year:  -   

  • Age-related changes of sensory and perceptual characteristics

    Project Year:  -   

  • Development of evaluation models on visibility

    Project Year:  -   

Papers 【 display / non-display

  • A quantitative analysis of the contribution of melanopsin to brightness perception

    M. Yamakawa, S. Tsujimura, K. Okajima

    Scientific Reports ( Springer Nature )  9 ( 7568 )   - - -   2019.05  [Refereed]

    Joint Work

    DOI

  • Visibility Assessment of Pro-beam Road Light on the Test Track

    HAGIWARA Toru, HAMAOKA Hidekatsu, KOHKO Shunsuke, OKAJIMA Katsunori, KOBAYASHI Shouji

    JSTE Journal of Traffic Engineering ( Japan Society of Traffic Engineers )  5 ( 2 )   A_134 - A_141   2019.01  [Refereed]

    Joint Work

     View Summary

    The present study proposes a road lighting system that uses pro-beam light distribution. The visibility of a pedestrian who is crossing the road and is illuminated by a conventional road light is known to depend on the relationship between the driver's position and the pedestrian's position. Pro-beam road lights are a fundamental solution to the problem of enhancing the visibility of pedestrians crossing the road. Based on the author's previous studies, the present study presents two novel types of pro-beam luminaires that incorporate LED lamps to show a slightly different light distribution and reveals the effects of these pro-beam road lights on the visibility of pedestrians crossing the road at night. The study includes two experiments. One is a field experiment to evaluate the visibility performance of these pro-beam road lights at a test track. The other is a laboratory experiment that uses images to determine when pedestrians crossing the road are detected. The two types of pro-beam road lights were found to afford considerably greater visibility performance in the driving lane than conventional road lights provide.

    DOI CiNii

  • Colour differences in Caucasian and Oriental women's faces illuminated by white LED sources

    M. Melgosa, N. Richard, C. Fernández-Maloigne, K. Xiao, H. de Clermont-Gallerande, S. Jost-Boissard, K. Okajima

    International Journal of Cosmetic Science ( WILEY )  40 ( 3 )   244 - 255   2018.07  [Refereed]

    Joint Work

    Web of Science DOI PubMed

  • Research and Development of Distribution of Pro-beam Light on Street in the Urban Area

    HAGIWARA Toru,KUSATAKE Daiki,HAMAOKA Hidekatsu,KOHKO Shunsuke,TODOROKI Makiko,OKAJIMA Katsunori,KOBAYASHI Shouji

      4 ( 3 )   A_10 - A_17   2018.01  [Refereed]

    Joint Work

    DOI CiNii

  • Temporal transition enhances the consonance of color arrangements

    Akira Asano, Chie M. Asano, Katsunori Okajima, Mikiko Kawasumi

    Proc. CIC25 (Color and Imaging Conference)     240 - 244   2017.09  [Refereed]

    Joint Work

display all >>

Review Papers 【 display / non-display

  • A Network Model for Color Recognition

    Journal of the Japan Society of Applied Physics   72 ( 11 ) 1421 - 1424   2003.11

    Introduction and explanation (scientific journal)   Single Work

Grant-in-Aid for Scientific Research 【 display / non-display

  • Fostering Joint International Research (B)

    Project Year: 2018.10  -  2022.03 

  • Grant-in-Aid for Scientific Research(A)

    Project Year: 2018.04  -  2022.03 

  • Grant-in-Aid for Scientific Research on Innovative Areas

    Project Year: 2015.11  -  2020.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2015.04  -  2018.03 

  • Grant-in-Aid for Scientific Research(B)

    Project Year: 2011.04  -  2014.03 

display all >>

Preferred joint research theme 【 display / non-display

  • Basic research on perception mechanism and auto-generation of material image

  • Applications of Sensor-Fusion System

  • Research on Universal Design

Past of Collaboration and Commissioned Research 【 display / non-display

  • Modeling of Color Information Processing Mechanism

    International Cooperative Research  

    Project Year: 2003.08  -  2010.03 

  • Development of Multi-Primary Color Display

    Cooperative Research within Japan  

    Project Year: 2003.04  -  2005.03 

  • Research on Age-Related Changes of Color Vision

    International Cooperative Research  

    Project Year: 2002.09  -  2010.10 

  • Research on Helth-Care Informatics

    Cooperative Research within Japan  

    Project Year: 2001.11  -  2003.10 

  • Research on Universal Design

    Cooperative Research within Japan  

    Project Year: 2000.04  -  2005.03 

 

Social Contribution(Extension lecture) 【 display / non-display

  • International Colour Association 2009

    2009.09