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. Author manuscript; available in PMC: 2010 Mar 22.
Published in final edited form as: Vision Res. 2008 Aug 9;48(26):2673–2681. doi: 10.1016/j.visres.2008.06.026

Fig. 1.

Fig. 1

“Sundance” by Ketchum (1993). Can you identify which parts are sunny and which shady? How? Why do you infer illuminant rather than material changes? Can you identify similar foliages from sunny to shady parts?