Element-arrangement textures in multiple objective tasks.
In his long years of studying visual perception, Jacob Beck made many contributions. This article is a short review of one line of his research--that we shared in--and then a presentation of some results from on-going research down the same line. In the 1980s Beck and his colleagues introduced a new kind of visual stimulus: element-arrangement texture patterns. A series of studies with these patterns has shown that a model containing spatial-frequency and orientation-selective channels can explain many aspects of texture perception as long as two kinds of nonlinear processes are also included; the published studies are briefly summarized. The new results come from multiple objective tasks requiring the observer to make simple discriminations between second-order element-arrangement textures. Results with the objective tasks replicate previously published results using subjective ratings, and the use of the objective tasks allows us to explore several more fine-grained questions about complex (second-order) channels and normalization.
Wolfson
S Sabina
SS
Columbia University, Department of Psychology, 406 Schermerhorn Hall, New York, NY 10027, USA. sabina@psych.columbia.edu
Graham
Norma
N
D015350:Contrast Sensitivity; D004192:Discrimination, Psychological; D005556:Form Perception; D006801:Humans; D008960:Models, Psychological; D017711:Nonlinear Dynamics