Ehrenstein illusion

From Wikipedia, the free encyclopedia

The Ehrenstein illusion is an optical illusion studied by the German psychologist Walter Ehrenstein (1899 – 1961) in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape (Figure 1).

  • Ehrenstein illusion (1)

  • Illusion (2)

  • Illusion (3); adding a circle (bottom) destroys the illusion of a bright central disk.

Sometimes the name "Ehrenstein" is associated with one of the illusory contour figures (Figure 2). The ends of the dark segments produce the illusion of circles. The apparent figures have the same color as the background, but appear brighter. A similar effect is obtained in the Kanizsa triangle.

References

Wikimedia Commons has media related to Optical illusion.
This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.