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
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
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 29th session of the CIE |
| Place of Publication | Washington D.C. |
| Pages | 1166-1174 |
| DOIs | |
| Publication status | Published - 30 Jun 2019 |
| Event | 29th CIE SESSION - Washington, United States Duration: 14 Jun 2019 → 22 Jun 2019 |
Conference
| Conference | 29th CIE SESSION |
|---|---|
| Country/Territory | United States |
| City | Washington |
| Period | 14/06/19 → 22/06/19 |