Validation of the predictive equation for spatial brightness in an experimental space

Yu, Hanui; Ko, Byoungwoo; Koga, Tomohiro; Hirate, Kotaroh; Sato, Naoyuki

doi:10.1080/00038628.2019.1664390

Cited by 4 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…12 Several other studies found a similar luminance relationship. For example, Yu et al 13 tested the spatial brightness equation proposed by Ko et al, 14 which employed the standard deviation of the log-luminance and the average luminance, including a brightness exponent of 1/3. Kirsch investigated visual interest and visual lightness.…”

Section: Introductionmentioning

confidence: 99%

The effect of correlated colour temperature and wall luminance on spatial brightness and scene preference in a windowless office setup

Perre¹,

Smet²,

Hanselaer³

et al. 2023

Lighting Research & Technology

View full text Add to dashboard Cite

This study explores the impact of wall luminance and correlated colour temperature (CCT) on the observers’ brightness perception and scene preference in a controlled, windowless office environment. A two-interval-forced-choice experiment was conducted with the 20 lighting scenes derived from five CCTs (2500–10 000 K) and four luminances (12–120 cd/m²). The results from 20 observers showed that a higher wall luminance significantly increased brightness. At equal luminances, different CCT values had no significant effect on brightness, consistent with some reports that CCT is not a reliable predictor of brightness when other photometric factors are held constant. Scene preference increased as wall luminance increased to approximately 72 cd/m², but a further increase in wall luminance to 120 cd/m² had no significant impact on preference. As the CCT increased from 2500 K, the preference increased up to approximately 4000 K, followed by a substantial decline from 5715 to 10 000 K.

show abstract

Section: Introductionmentioning

confidence: 99%