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  2. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. Hybrid image: A Hybrid image is an optical illusion developed at MIT in which an image can be interpreted in one of two different ways depending on viewing distance. Illusory contours

  3. Checker shadow illusion - Wikipedia

    en.wikipedia.org/wiki/Checker_shadow_illusion

    The optical illusion is that the area labeled A appears to be a darker color than the area labeled B. However, within the context of the two-dimensional image, they are of identical brightness, i.e., they would be printed with identical mixtures of ink, or displayed on a screen with pixels of identical color. [1]

  4. Missing square puzzle - Wikipedia

    en.wikipedia.org/wiki/Missing_square_puzzle

    The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

  5. Cornsweet illusion - Wikipedia

    en.wikipedia.org/wiki/Cornsweet_illusion

    The same image as above, but the edge in the middle is hidden: the left and right part of the image appear as the same color. The Cornsweet illusion , also known as the Craik–O'Brien–Cornsweet illusion or the Craik–Cornsweet illusion , is an optical illusion that was described in detail by Tom Cornsweet in the late 1960s. [ 1 ]

  6. Café wall illusion - Wikipedia

    en.wikipedia.org/wiki/Café_wall_illusion

    The same image, with colors of lower contrast, no longer displaying the illusion The café wall illusion (also known as the Münsterberg illusion or the kindergarten illusion ) is a geometrical-optical illusion in which the parallel straight dividing lines between staggered rows with alternating dark and light rectangles (such as bricks or ...

  7. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    In addition to the gestalt principles of perception, water-color illusions contribute to the formation of optical illusions. Water-color illusions consist of object-hole effects and coloration. Object-hole effects occur when boundaries are prominent where there is a figure and background with a hole that is 3D volumetric in appearance.

  8. Peripheral drift illusion - Wikipedia

    en.wikipedia.org/wiki/Peripheral_drift_illusion

    Rotating snakes is an optical illusion developed by Professor Akiyoshi Kitaoka in 2003. [1] A type of peripheral drift illusion, the "snakes" consist of several bands of color which resemble coiled serpents. Although the image is static, the snakes appear to be moving in circles.

  9. Ebbinghaus illusion - Wikipedia

    en.wikipedia.org/wiki/Ebbinghaus_illusion

    The Ebbinghaus illusion or Titchener circles is an optical illusion of relative size perception. Named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909), the illusion was popularized in the English-speaking world by Edward B. Titchener in a 1901 textbook of experimental psychology, hence its alternative name. [ 1 ]