Perceived Colorfulness of High‐Brightness Color Stimuli

ABSTRACT Perceived colorfulness (or color saturation) of a new high‐brightness color stimuli dataset was measured in a psychophysical scaling experiment. Stimuli created with a 7‐primary LED system covered a broad range of luminance from 50 to 2000 cd/m 3 and reached chromaticities beyond Rec. 2100. Experimental results reveal that previous color appearance models, such as CIECAM16 and CIELAB, do not accurately describe the measured colorfulness results, but predictions can be improved with simple power functions. Testing shows that applying a simple model results in statistically significant improvements in the performance of the predictors. This work will not only help understand the color perception of future HDR displays and advanced lighting system with narrow‐band primaries, but also contribute to future improvements to CAMs.