Abstract
The purpose of this work is to examine the chromatic property of color-discrimination of illuminant. For experiment, we use illuminant stimuli that obtain spectral distributions as similar as CIE daylight illuminants by solving constrained linear least squares problem. Five types of hyperspectral natural images illuminated by these illuminant stimuli were presented on the hyperspectral display. The results show that (1) thresholds of illuminant color-discrimination are larger than those of color discrimination and (2) thresholds of illuminant color-discrimination along D-direction that follows the daylight locus are larger than those along of N-direction that is negative line of D-direction.
