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J Vis. 2003;3(8):541-53. Epub 2003 Sep 25.

The effect of perceived surface orientation on perceived surface albedo in binocularly viewed scenes.

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Department of Psychology & Center for Neural Science, New York University, New York, NY, USA.


We examined how observers discount perceived surface orientation in estimating perceived albedo (lightness). Observers viewed complex rendered scenes binocularly. The orientation of a test patch was defined by depth cues of binocular disparity and linear perspective. On each trial, observers first estimated the orientation of the test patch in the scene by means of a gradient probe and then matched its perceived albedo to a reference scale. We found that observers' perception of orientation was nearly veridical and that they substantially discounted perceived orientation in estimating perceived albedo.

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