Cornsweet illusion

Cornsweet illusion. The left part of the picture seems to be darker than the right one, though in fact they have the same brightness.

Meaning

Noun

  • An optical illusion where an edge between regions of the same shade causes them to be perceived as different shades.

Origin

  • It was described in detail by Tom N. Cornsweet in the late 1960s.

Modern English dictionary

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