Title: Correlation between colour quality metric predictions and visual appreciation of light sources
Authors: Smet, Kevin ×
Ryckaert, Wouter
Pointer, Michael R.
Deconinck, Geert
Hanselaer, Peter #
Issue Date: 25-Apr-2011
Publisher: Optical Society of America
Series Title: Optics Express vol:19 issue:9 pages:8151-8166
Article number: 10.1364/OE.19.008151
Abstract: Over the past years there has been increasing evidence that the CIE color rendering index Ra fails to correspond to the perceived color quality of many light sources, especially some Light-Emitting-Diodes. Several proposals to update, complement or even replace the CIE Ra have therefore been made. The performance of thirteen color quality metrics was evaluated by calculating the average correlation of the metric predictions with the visual scaling of the perceived color quality obtained in several psychophysical studies. Two aspects of perceived color quality were investigated, appreciation (preference or attractiveness) and naturalness. The memory color quality metric (Sa) of Smet et al. was found to correlate highly with perceived appreciation (r = 0.88). It was found to be statistically better (p<0.0001) at it than all other metrics. The CIE Ra performed the worst. A metric that combines the gamut area index (GAI) and the CIE Ra using an arithmetic mean correlated highly with the perceived naturalness of a light source (r = 0.85). It was found to be statistically better at predicting naturalness than all other metrics (p<0.0001). A negative correlation was found, between the capabilities of a light source‘s ability to predict appreciation and naturalness, indicating that a complete description of the color quality of a light source probably requires more than one metric.
ISSN: 1094-4087
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - ELECTA, Electrical Energy Computer Architectures
Technologiecluster ESAT Elektrotechnische Engineering
Electrical Engineering (ESAT) TC, Technology Campuses Ghent and Aalst
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Correlation between colour quality metric predictions and visual appreciation of light sources.pdfMain article Published 1336KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science