Oxyopia Abstract

October 9, 2009
489 Minor Hall

Michael Webster, PhD
Foundation Professor of Psychology, Graduate Programs in Cognitive and Brain Sciences and Biomedical Engineering, Department of Psychology, University of Nevada, Reno
Host: Karen De Valois

Title

Adapting images to observers

Abstract

Adaptation effects are normally studied by exposing observers to images and then measuring the resulting changes in perception. We have been exploring the consequences of adaptation by instead adapting images to the observer. The algorithm uses an empirically based model of color adaptation to render the colors in images as they would appear to an observer under theoretically complete adaptation to a given environment. This can be used to visualize how colors might look to others, and provides a common framework for assessing the influence of stimulus differences (e.g., between environments) or observer differences (e.g., in visual sensitivity) on color appearance. The images can also be used to test functional theories of adaptation by comparing how performance in tasks like visual search improves when images are pre-adapted to match the adaptation state of the observer.

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