Misidentifying illuminant changes in natural scenes due to failures in relational colour constancy.

ABSTRACT: The colours of surfaces in a scene may not appear constant with a change in the colour of the illumination. Yet even when colour constancy fails, human observers can usually discriminate changes in lighting from changes in surface reflecting properties. This operational ability has been attributed to the constancy of perceived colour relations between surfaces under illuminant changes, in turn based on approximately invariant spatial ratios of cone photoreceptor excitations. Natural deviations in these ratios may, however, lead to illuminant changes being misidentified. The aim of this work was to test whether such misidentifications occur with natural scenes and whether they are due to failures in relational colour constancy. Pairs of scene images from hyperspectral data were presented si

SUBMITTER: Nascimento SMC 

PROVIDER: S-EPMC10685115 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature