Predicting the brightness of unrelated self-luminous stimuli

In a magnitude estimation experiment, twenty observers rated the brightness of several unrelated, self-luminous stimuli surrounded by a dark background. The performance of a number of existing vision models, color appearance models and models based on the concept of equivalent luminance in predictin...

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Bibliographic Details
Published in:Optics express 2014-06, Vol.22 (13), p.16298-16309
Main Authors: Withouck, Martijn, Smet, Kevin A G, Ryckaert, Wouter R, Deconinck, Geert, Hanselaer, Peter
Format: Article
Language:English
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Summary:In a magnitude estimation experiment, twenty observers rated the brightness of several unrelated, self-luminous stimuli surrounded by a dark background. The performance of a number of existing vision models, color appearance models and models based on the concept of equivalent luminance in predicting brightness has been investigated. Due to a severe underestimation of the Helmholtz-Kohlrausch effect, none of the models performed acceptable. Increasing the weight of the colorfulness contribution to the brightness attribute in the CAM97u model results in a very good correlation between the model predictions and the visually perceived brightness. Finally the experimental results and the brightness prediction from the modified model CAM97u,m are verified through a matching experiment and a validation magnitude estimation experiment.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.22.016298