Abstract
In this study, we quantitatively express the change in perceived whiteness of whitish surfaces under 3000 K and 6700 K fluorescent lamps. The experimental results of the previous study plotted in the CIECAM02 (a, b) plane fitted a bivariate normal distribution well. Furthermore, we conducted an experiment to determine the relative values of perceived whiteness under these fluorescent lamps. The perceived whiteness of a reflectance standard under a pseudo-D65 fluorescent lamp was set at 100, and the results showed that the relative whiteness levels were 74 and 89 under 3000 K and 6700 K lamps, respectively. We propose a method to calculate the relative value of perceived whiteness of any particular whitish surface under any light source.
