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The widely accepted interpretation of, e.g. the Poggendorff and Hering illusions as manifestation of expansion of acute angles at line intersections, is an example of successful implementation of a "bottom-up," physiological explanation of a geometrical–optical illusion. Ponzo illusion in a purely schematic form and, below, with perspective clues
The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: 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.
A pencil or another rigid straight line can appear as bending like flexible rubber when it is wiggled fast enough between fingers, or otherwise undergoing rigid motion. Persistence of vision has been discarded as sole cause of the illusion. It is thought that the eye movements of the observer fail to track the motions of features of the object ...
Pencil_in_a_bowl_of_water.png: User:Theresa_knott derivative work: Gregors ( talk ) 10:51, 23 February 2011 (UTC) This is a retouched picture , which means that it has been digitally altered from its original version.
Optical illusion is also used in film by the technique of forced perspective. Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.
An auditory illusion is an illusion of hearing, the auditory equivalent of a visual illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds. In short, audio illusions highlight areas where the human ear and brain, as organic, makeshift tools, differ from perfect audio receptors (for better or for ...
Movement in Squares, by Bridget Riley 1961. Op art, short for optical art, is a style of visual art that uses optical illusions. [1]Op artworks are abstract, with many better-known pieces created in black and white.
An angular size illusion may be accompanied by (or cause) a linear size illusion at the same time. The perceived visual angle paradigm begins with a rejection of the classical size–distance invariance hypothesis (SDIH), which states that the ratio of perceived linear size to perceived distance is a simple function of the visual angle.