Simulation of appearance of objects in low illuminance

模拟低照度下物体的外观

• 批准号: 04650034
• 负责人: YAGUCHI Hirohisa
• 金额: $ 0.32万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650034/
• 关键词: color appearance; mesopic vision; color matching; color reproduction; colorimetry; 測色値; 桿体; 明視視

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.

在明视和暗视范围之间的中间亮度或照度水平的色觉被称为中间视觉。在中间视觉中，我们从明视中感知不同的颜色，因为不仅是颜色，而且杆也有助于视觉反应。在本研究报告中，颜色外观的36个色卡在6个照度水平从0.01 lx到1000 lx的单倍匹配方法估计。将测试色卡呈现在测试场中并通过左眼观察，并且通过右眼观察参考场中的自然色系统（NCS）彩色图谱。从NCS Color Atlas中选择一个颜色外观与测试颜色相同的色卡。受试者回答四个尺度的NCS，色调，白度，黑度和色度。实验结果表明，随着光照度的降低，（1）色度降低，（2）在绿-蓝和黄-橙区域观察到色调偏移，（3）亮度对比度降低，利用所获得的实验结果，我们开发了一种算法，可以从静止摄像机在明视条件下拍摄的彩色图像中预测中间视觉的颜色外观。

项目成果

Chiharu Momma: "Haploscopic Color Matching for Surface Color in Mesopic Vision" KOGAKU Japanese Journal of Optics. Vol.22. 273-280 (1993)

Chiharu Momma：“中间视觉中表面颜色的单倍颜色匹配”KOGAKU 日本光学杂志。

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)

Tomoharu Monma：“使用双眼隔片颜色匹配方法测量中间视觉中的表面颜色外观”22。（1993）

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)

Tomoharu Monma：“使用双眼隔匹配法测量中间视觉中的表面颜色外观”光学。 22. 273-280 (1993)