CEILING-BASED LUMINANCE MEASUREMENTS: A FEASIBLE SOLUTION?

PROCEEDINGS OF the 29th Quadrennial Session of the CIE Pub Date : 2019-06-24 DOI:10.25039/X46.2019.PO077

T. Kruisselbrink, R. Dangol, Evert van Loenen

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引用次数: 3

Abstract

Luminance distributions would be very suitable as input for lighting control systems that aim for a comfortable lit indoor environment. Luminance distribution measurements should then correspond to the visual field of the user. However, this will interfere with office activities. Therefore, this study aims to validate whether it is feasible to approximate the luminous conditions experienced by the user using ceiling-based measurements instead. The average desktop luminance was measured using a luminance camera, under varying conditions, simultaneously from eye level and ceiling and their relations were analysed. Normalized root mean square errors were found ranging from 10,3 % to 14,3 %, while the average bias was 14,2 % between measurements from eye level and ceiling. Based on these results, it is concluded that the experienced desktop luminance cannot be exactly replicated by ceilingbased measurements. However, ceiling-based luminance measurements are able to provide a reasonable approximation that suffices for practical systems. Keywords: Luminance Camera, Field of View, HDR, Ceiling-based, Luminance distribution, Desktop luminance, Unobtrusive measurements

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基于天花板的亮度测量:一个可行的解决方案?

亮度分布将非常适合作为照明控制系统的输入，目标是一个舒适的室内照明环境。亮度分布测量应该与用户的视野相对应。然而，这会干扰办公室活动。因此，本研究旨在验证使用基于天花板的测量来近似用户所经历的发光条件是否可行。在不同条件下，使用亮度相机同时测量桌面平均亮度，并分析其关系。归一化均方根误差在10.3%到14.3%之间，而眼位和天花板测量值之间的平均偏差为14.2%。基于这些结果，得出的结论是，经验桌面亮度不能精确地复制基于天花板的测量。然而，基于天花板的亮度测量能够提供一个合理的近似值，足以满足实际系统。关键词:亮度相机，视场，HDR，基于天花板的，亮度分布，桌面亮度，低调测量

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PROCEEDINGS OF the 29th Quadrennial Session of the CIE

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