Invariant categorical color regions across illuminant change coincide with focal colors.

ABSTRACT: Are there regions in a color space where color categories are invariant across illuminant changes? If so, what characteristics make them more stable than other regions? To address these questions, we asked observers to give a color name to 424 colored surfaces, presented one at a time, under various chromatic illuminants. Results showed a high degree of categorical color constancy, especially under illuminants that occur in the natural environment. It was also shown that surfaces selected as a focal color (the best example of a color category) are more resistant to illuminant change than nonfocal color samples. We additionally ran an asymmetric color matching experiment to quantify the shift of color appearance induced by illuminant changes using surfaces that were all named gray, thereby

SUBMITTER: Morimoto T 

PROVIDER: S-EPMC9927787 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature