Prediction of transparency perception based on cone-excitation ratios.
Perceptual transparency was measured in two experiments by using simulations of illuminated surfaces presented on a CRT monitor. In a two-alternative forced-choice paradigm, observers viewed two simulated Mondrians in temporal sequence. In one sequence the Mondrian was simulated to be partially covered by a transparent filter; in the other sequence the filter color over each Mondrian patch was modified. Observers were instructed to select the sequence containing a transparent filter. Observers' selections corresponded to sequences in which the cone-excitation ratios for each adjacent pair of Mondrian patches were approximately the same as the cone-excitation ratios for the pair of patches covered by a filter. The results suggest that cone-excitation ratios may be a cue for perceptual transparency.
Ripamonti
Caterina
C
Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. ripamont@psych.upenn.edu
Westland
Stephen
S
D003463:Cues; D006801:Humans; D008960:Models, Psychological; D011601:Psychophysics / Q000379:methods; D017949:Retinal Cone Photoreceptor Cells / Q000502:physiology*; D014785:Vision, Ocular / Q000502:physiology*