title: A ratio model of perceptual transparency.
abstract: A ratio model of the achromatic transparency of a phenomenal surface on a bipartite background is proposed. The model asserts that transparency corresponds to the evaluation of the ratio of the lightness difference inside the transparent surface to the difference in reference lightness inside the background. It applies to both balanced and unbalanced transparency. The ratio model was compared experimentally with the previous perceptual model of achromatic transparency proposed by Metelli. Each model was tested by comparing the rated with the predicted transparency. Analysis shows that the ratio model provides better predictions of transparency than those provided by Metelli's model.
authors.affiliation: Department of General Psychology, University of Padua, Padova, Italy. tommasi@snoopy.psy.uipd.it
authors.forename: M
authors.initials: M
authors.lastname: Tommasi
mesh_terms: D003118:Color Perception / Q000502:physiology*; D006801:Humans; D008960:Models, Psychological