Examples
A classic example of illusory contours is the Kanizsa triangle, named after the psychologist Gaetano Kanizsa. This figure comprises black circles with wedges facing the center point and three black angles on a white background. But many observers see a white triangle on top of three black disks and an outline triangle. The white triangle appears brighter than the white background and shows a contour even in regions where there is no luminance change in the image.
The Ehrenstein illusion is another example form of illusory contour.
Recent internet phenomenon ThinkInvisible is using the same technique to re-create pop cultural icons in a puzzle game form.
Read more about this topic: Illusory Contours
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