Chubb illusion

An example of the Chubb illusion. The two centres are identical.

The Chubb illusion is an optical illusion wherein the apparent contrast of an object varies dramatically, depending on the context of the presentation.^[1] Low-contrast texture surrounded by a uniform field appears to have higher contrast than when it is surrounded by high-contrast texture. This was observed and documented by Charles Chubb and colleagues in 1989.^[2]

See also

• Contrast effect
• Checker shadow illusion
• Spatial frequency

References

1. ^ Lotto RB, Purves D. "An empirical explanation of the Chubb illusion." J Cogn Neurosci. 2001 Jul 1;13(5):547-55. PMID 11506656.
2. ^ Chubb C, Sperling G, Solomon JA. "Texture interactions determine perceived contrast." Proc Natl Acad Sci U S A. 1989 Dec;86(23):9631-5. PMID 2594791.

External links

• An Empirical Explanation: Chubb Illusion, from Dale Purves Lab.

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