Characterization of human lightness discrimination thresholds for independent spectral variations.

ABSTRACT: The lightness of an object is an intrinsic property that depends on its surface reflectance spectrum. The visual system estimates an object's lightness from the light reflected off its surface. However, the reflected light also depends on object extrinsic properties of the scene, such as the light source. For stable perception, the visual system needs to discount the variations due to the object extrinsic properties. We characterize this perceptual stability for variation in two spectral properties of the scene: the reflectance spectra of background objects and the intensity of light sources. We measure human observers' thresholds of discriminating computer-generated images of 3D scenes based on the lightness of a spherical target object in the scene. We measured change in discrimination t

SUBMITTER: Reynolds D 

PROVIDER: S-EPMC11475098 | biostudies-literature | 2024 Sep-Oct

REPOSITORIES: biostudies-literature