Ceiling-based luminance measurements: a feasible solution?

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

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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
Originele taal-2Engels
TitelProceedings of the 29th session of the CIE
Plaats van productieWashington D.C.
Pagina's1166-1174
DOI's
StatusGepubliceerd - 30 jun 2019
Evenement29th CIE SESSION - Washington, Verenigde Staten van Amerika
Duur: 14 jun 201922 jun 2019

Congres

Congres29th CIE SESSION
LandVerenigde Staten van Amerika
StadWashington
Periode14/06/1922/06/19

Vingerafdruk

Ceilings
Luminance
Cameras
Lighting
Control systems

Citeer dit

Kruisselbrink, Thijs ; Dangol, Rajendra ; van Loenen, Evert. / Ceiling-based luminance measurements: a feasible solution?. Proceedings of the 29th session of the CIE. Washington D.C., 2019. blz. 1166-1174
@inproceedings{63a0e88da6154e458f94d4c09fa4d8b4,
title = "Ceiling-based luminance measurements: a feasible solution?",
abstract = "Luminance distributions would be very suitable as input for lighting control systems that aim fora comfortable lit indoor environment. Luminance distribution measurements should thencorrespond 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 luminousconditions experienced by the user using ceiling-based measurements instead. The averagedesktop luminance was measured using a luminance camera, under varying conditions,simultaneously from eye level and ceiling and their relations were analysed. Normalized rootmean square errors were found ranging from 10,3 {\%} to 14,3 {\%}, while the average bias was14,2 {\%} between measurements from eye level and ceiling. Based on these results, it isconcluded that the experienced desktop luminance cannot be exactly replicated by ceilingbasedmeasurements. However, ceiling-based luminance measurements are able to provide areasonable approximation that suffices for practical systems.Keywords: Luminance Camera, Field of View, HDR, Ceiling-based, Luminance distribution,Desktop luminance, Unobtrusive measurements",
author = "Thijs Kruisselbrink and Rajendra Dangol and {van Loenen}, Evert",
year = "2019",
month = "6",
day = "30",
doi = "10.25039/x46.2019.PO077",
language = "English",
pages = "1166--1174",
booktitle = "Proceedings of the 29th session of the CIE",

}

Kruisselbrink, T, Dangol, R & van Loenen, E 2019, Ceiling-based luminance measurements: a feasible solution? in Proceedings of the 29th session of the CIE. Washington D.C., blz. 1166-1174, 29th CIE SESSION , Washington, Verenigde Staten van Amerika, 14/06/19. https://doi.org/10.25039/x46.2019.PO077

Ceiling-based luminance measurements: a feasible solution? / Kruisselbrink, Thijs; Dangol, Rajendra; van Loenen, Evert.

Proceedings of the 29th session of the CIE. Washington D.C., 2019. blz. 1166-1174.

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademic

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AU - Dangol, Rajendra

AU - van Loenen, Evert

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N2 - Luminance distributions would be very suitable as input for lighting control systems that aim fora comfortable lit indoor environment. Luminance distribution measurements should thencorrespond 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 luminousconditions experienced by the user using ceiling-based measurements instead. The averagedesktop luminance was measured using a luminance camera, under varying conditions,simultaneously from eye level and ceiling and their relations were analysed. Normalized rootmean square errors were found ranging from 10,3 % to 14,3 %, while the average bias was14,2 % between measurements from eye level and ceiling. Based on these results, it isconcluded that the experienced desktop luminance cannot be exactly replicated by ceilingbasedmeasurements. However, ceiling-based luminance measurements are able to provide areasonable approximation that suffices for practical systems.Keywords: Luminance Camera, Field of View, HDR, Ceiling-based, Luminance distribution,Desktop luminance, Unobtrusive measurements

AB - Luminance distributions would be very suitable as input for lighting control systems that aim fora comfortable lit indoor environment. Luminance distribution measurements should thencorrespond 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 luminousconditions experienced by the user using ceiling-based measurements instead. The averagedesktop luminance was measured using a luminance camera, under varying conditions,simultaneously from eye level and ceiling and their relations were analysed. Normalized rootmean square errors were found ranging from 10,3 % to 14,3 %, while the average bias was14,2 % between measurements from eye level and ceiling. Based on these results, it isconcluded that the experienced desktop luminance cannot be exactly replicated by ceilingbasedmeasurements. However, ceiling-based luminance measurements are able to provide areasonable 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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