Shape from shading in pigeons.

Cook, Robert G.

Qadri, Muhammad A.

Kieres, Art.

Commons-Miller, Nicholas.


  • Light is the origin of vision. The pattern of shading reflected from object surfaces is one of several optical features that provide fundamental information about shape and surface orientation. To understand how surface and object shading is processed by birds, six pigeons were tested with differentially illuminated convex and concave curved surfaces in five experiments using a go/no-go procedure. ... read more
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  • Cook, Robert G., Muhammad A.J. Qadri, Art Kieres, and Nicholas Commons-Miller. "Shape from Shading in Pigeons." Cognition 124, no. 3 (September 2012): 284-303. doi:10.1016/j.cognition.2012.05.007.
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