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The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...
The illusion derives from the lack of visual cues for depth. For instance, as the dancer's arms move from viewer's left to right, it is possible to view her arms passing between her body and the viewer (that is, in the foreground of the picture, in which case she would be circling counterclockwise on her right foot) and it is also possible to view her arms as passing behind the dancer's body ...
The Spinning Dancer is a kinetic, bistable optical illusion resembling a pirouetting female dancer. The dancer can be seen to be spinning alternately one direction, or the other. In visual perception, the kinetic depth effect is the phenomenon whereby the three-dimensional structural form of an object can be perceived when the object is moving.
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.
Spinning_Dancer_Optical_Illusion_(2040_frames).ogv (Ogg Theora video file, length 1 min 1 s, 300 × 400 pixels, 673 kbps, file size: 4.91 MB) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
1 Spinning Dancer. Toggle Spinning Dancer subsection. 1.1 For those having difficulty seeing the illusion: 1.2 Before Closing Nomination. Toggle the table of contents.
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. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.
In his writings and art criticisms during the mid-1960s art critic and artist Donald Judd claimed that illusionism in painting undermined the artform itself. Judd implied that painting was dead, claiming painting was a lie because it depicted the illusion of three-dimensionality on a flat surface. Judd claimed that painting needed to recognize ...