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Published February 15, 1996 | public
Journal Article

Where is the sun?

Abstract

As illustrated by the well-known moon crater illusion, the human visual system uses a light-from-above assumption when it interprets shaded stimuli as 3-D shapes. Experimental results involving shaded stimuli also support this observation (Braun '90, '93; Kleffner & Ramachandran '91: Sun & Perona '93). While a light-from-above assumption is made for solving tasks involving ambiguous stimuli with shading consistent with both light-from-above and light-from-below, what assumption is made when lighting is from the side?

Additional Information

© 1996 ARVO. Supported by: NSF, NIH Training Grant.

Additional details

Created:
August 20, 2023
Modified:
October 23, 2023