Circle in a square illusion

Circle in a square illusion

T478/0432 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 95.8MB

Downloadable file size: 423.7KB

Price image Pricing

Please login to use the price calculator

This image is part of the feature Illusions


Caption: Circle in a square illusion. The two red circles in the image are the same size. However, the one inside a blue square looks larger than the one enclosing a blue square. This is similar to the Delboeuf illusion and is a demonstration of assimilation - the effect whereby the perceived difference between neighbouring objects is reduced. So the brain treats each circle as being closer in size to its square than it actually is, leading to the apparent discrepancy.

Release details: Model release not required. Property release not required.

Keywords: ambiguity, ambiguous, assimilation effect, circle in a square illusion, delboeuf, illusions, illusory, neuroscience, optical illusion, perception, psychology, trick, trickery vision, vision, visual, visual trick

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.