Road Marking Contrast Threshold Revisited

IF 2.6 2区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Leukos Pub Date : 2021-12-16 DOI:10.1080/15502724.2021.1993893

R. Spieringhs, Kevin A. G. Smet, I. Heynderickx, P. Hanselaer

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引用次数: 1

Abstract

ABSTRACT Sufficient contrast between road surface and road markings is key for a safe and comfortable driving experience. This calls for a comprehensive and well established contrast (threshold) model, which ideally results in a single contrast threshold value independent of object angular size or road luminance. The contrast threshold model introduced by Adrian is still commonly used in road lighting. More recently, new contrast metrics that also predict supra-threshold contrast visibility have been proposed, but the corresponding visibility thresholds are not yet known. In the present study, participants are presented a rendering of a highway, including road marking arrows of various size and luminance and were asked to indicate the direction of the arrow. The luminance of the road surface, acting as background for the markings, was varied too. Due to the very low luminance values and the very small differences in luminance, measurement accuracy and calibration issues require special attention. The results show good agreement with Adrian’s visibility model (R2 = 0.75) in terms of luminance contrast, background luminance and size. In addition, we used our experimental data to define contrast thresholds for several other existing image based contrast models. Unfortunately, it seems to be impossible to state one unique threshold contrast value independent of object angular size and road luminance.

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重新审视道路标线对比度阈值

路面与道路标线之间的充分对比是安全舒适驾驶体验的关键。这需要一个全面和完善的对比度(阈值)模型，理想情况下，它会产生一个独立于物体角度大小或道路亮度的单一对比度阈值。Adrian介绍的对比度阈值模型在道路照明中仍然被广泛使用。最近，也提出了新的对比度指标，也预测超阈值对比度可见性，但相应的可见性阈值尚不清楚。在本研究中，研究人员向参与者展示了一张高速公路的渲染图，其中包括各种大小和亮度的道路标记箭头，并要求他们指出箭头的方向。路面的亮度，作为背景的标志，也是变化的。由于非常低的亮度值和非常小的亮度差异，测量精度和校准问题需要特别注意。结果表明，在亮度对比度、背景亮度和大小方面，与Adrian能见度模型(R2 = 0.75)吻合较好。此外，我们使用我们的实验数据来定义其他几个现有的基于图像的对比度模型的对比度阈值。不幸的是，似乎不可能陈述一个独立于物体角度大小和道路亮度的唯一阈值对比度值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Leukos 工程技术-光学

CiteScore

7.60

自引率

5.60%

发文量

审稿时长

>12 weeks

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