title: Protanopic observers show nearly normal color constancy with natural reflectance spectra.
abstract: The ability of color-deficient observers to discriminate between illuminant changes and surface-reflectance changes in a scene was tested with natural and Munsell reflectance spectra. To avoid the confounding effects of spatial structure, stimuli were simulations of Mondrian-like colored patterns, presented on a computer-controlled color monitor. Protanopes performed less well than normal trichromats, regardless of the type of reflectance spectra, but they were least disadvantaged with patterns comprising reflectance spectra drawn from urban and rural scenes, more characteristic of the natural environment.
authors.affiliation: Visual and Computational Neuroscience Group, University of Manchester Institute of Science and Technology, Manchester, UK. r.baraas@umist.ac.uk
authors.forename: Rigmor C
authors.initials: RC
authors.lastname: Baraas
authors.forename: David H
authors.initials: DH
authors.lastname: Foster
authors.forename: Kinjiro
authors.initials: K
authors.lastname: Amano
authors.forename: Sérgio M C
authors.initials: SM
authors.lastname: Nascimento
mesh_terms: D000328:Adult; D003118:Color Perception / Q000502:physiology*; D003117:Color Vision Defects / Q000145:classification / Q000503:physiopathology* / Q000523:psychology; D015350:Contrast Sensitivity; D005260:Female; D006801:Humans; D007600:Judgment; D008297:Male; D010775:Photic Stimulation