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Simulation of appearance of objects in low illuminance

Research Project

Project/Area Number 04650034
Research Category

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

Allocation TypeSingle-year Grants
Research Field 物理計測・光学
Research InstitutionChiba University

Principal Investigator

YAGUCHI Hirohisa  Chiba University, Department of Engineering, Associate Professor, 工学部, 助教授 (30134844)

Co-Investigator(Kenkyū-buntansha) SHIOIRI Satoshi  Chiba University, Department of Engineering, Research Associate, 工学部, 助手 (70226091)
HANEISHI Hideaki  Chiba University, Department of Engineering, Research Associate, 工学部, 助手 (20228521)
MIYAKE Yoichi  Chiba University, Department of Engineering, Professor, 工学部, 教授 (70027895)
Project Period (FY) 1992 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥500,000 (Direct Cost: ¥500,000)
Keywordscolor appearance / mesopic vision / color matching / color reproduction / colorimetry / 測色値 / 桿体 / 明視視
Research Abstract

Color vision at an intermediate luminance or illuminance level between photopic and scotopic range is called mesopic vision. In mesopic vision, we perceive different colors from in photopic vision, because not only ones but also rods contribute to the visual response. In this research report, color appearance for 36 color chips under 6 illuminance levels from 0.01 lx to 1000 lx was estimated by a haploscopic color matching method. A test color chip was presented in the test field and observed by the left eye, and the Natural Color System (NCS) Color Atlas in the reference field was observed by the right eye. One color chip which was the same color appearance as the test color was selected from the NCS Color Atlas. Subjects responded four scales of the NCS, hue, whiteness, blackness and chromaticness. The experimental results show that as the illuminance decreased, (1) chromaticness decreased, (2) hue shift was observed in green-blue and yellow-orange regions and (3) brightness contrast decreased.
Using obtained experimental results, we have developed an algorithm which can predict color appearance for mesopic vision from color images taken by a still video camera in the photopic condition.

Report

(3 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 門馬智春: "両眼隔壁等色法による薄明視における表面色の見えの測定" 光学. 22. 273-280 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] Chiharu Momma: "Haploscopic Color Matching for Surface Color in Mesopic Vision" KOGAKU Japanese Journal of Optics. Vol.22. 273-280 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] 門馬智春: "両眼隔壁等色法による薄明視における表面色の見えの測定" 光学. 22. 273-280 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 門馬 智春: "両眼隔壁等色法による薄明視における表面色の見えの測定" 光学. 22. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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