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Double opponency as a generalized concept in texture segregation illustrated with stimuli defined by color, luminance, and orientation

Conducted a series of experiments in texture discrimination with textures whose local elements are defined by their color (red and/or green), luminance polarity, and orientation (vertical and/or horizontal). 23 distinct texture configurations were designed for testing and parameterizing a model based on the generalization of the concept of double opponency. The double-opponent mechanisms of the model are classified into the domains of luminance- and color-oriented and luminance- and color-nonoriented domains. Texture edge strength is extracted from the weighted, half-wave rectified outputs of each double-opponent mechanism. These signals are combined through probability summation within each domain. Sensitivity to a given texture pair is predicted by the probability summation of all the domain outputs. (PsycINFO Database Record (c) 2005 APA, all rights reserved)



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