6533b7d1fe1ef96bd125ce65
RESEARCH PRODUCT
Color and lightness constancy in different perceptual tasks
Christoph Von CampenhausenNicola Schneidersubject
AdultMaleLightnessGeneral Computer ScienceMesopic visionColor visionColorAdaptation (eye)Discrimination LearningHumansComputer visionScotopic visionMathematicsColor constancyAdaptation Ocularbusiness.industryCIECAM02Sensory ThresholdsRetinal Cone Photoreceptor CellsFemaleArtificial intelligencebusinessColor PerceptionPhotic StimulationBiotechnologyPhotopic visiondescription
Color and lightness constancy with respect to changing illumination was studied with three different perceptual tasks: ranking of colored papers according (1) to their lightness and (2) to their chromatic similarity in photopic, mesopic, and scotopic states of adaptation, and (3) recognition of remembered colored papers after changes of illumination in photopic vision. Constancy was found in the second task, only. Excitations of light receptors and luminance channels were computed to simulate the empirical rank orders. Results of the first task can be predicted with the hypothesis that luminance channels are activated, if lightness is asked for. Sequences arranged with respect to chromatic similarity were found independent of the illuminant spectra, even if the calculated rank orders of cone excitation were changed in the altered illumination.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-11-23 | Biological Cybernetics |