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The spinning dancer is a kinetic, bistable optical illusion resembling a rotating female dancer. The Spinning Dancer, also known as the Silhouette Illusion, is a kinetic, bistable, animated optical illusion originally distributed as a GIF animation showing a silhouette of a pirouetting female dancer.
Visual artist Gianni A. Sarcone has produced animations that he calls kinegrams since 1997. He describes his animations as "optic kinetic media" that "artfully combine the visual effects of moiré patterns with the zoetrope animation technique". Sarcone also created rotating animations that use a transparent disc with radial lines that has to ...
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Spinning Dancer.gif 300 × 400; 204 KB. Tablet press animation.gif 930 × 648; ... User-FastFission-brain.gif 213 × 231; 444 KB. Using sextant swing.gif 787 × 393 ...
The brain may give up trying to move eye muscles in order to get a clear picture. If one slowly pulls back the picture away from the face, while refraining from focusing or rotating eyes, at some point the brain will lock onto a pair of patterns when the distance between them matches the current convergence degree of the two eyeballs. [17]
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Joseph Plateau created a combination of his phénakisticope and his Anorthoscope sometime between 1844 and 1849, resulting in a back-lit transparent disc with a sequence of figures that are animated when it is rotated behind a counter-rotating black disc with four illuminated slits, spinning four times as fast. Unlike the phénakisticope ...
This goes to show just how powerful the illusion is. She is not "spinning" in any direction, nor is her shadow. She is a black 2-dimensional collection of pixels, constantly changing shape. Because your mind perceives this shape as a familiar 3-dimensional object - a woman rotating-, your brain wants to assign a rotation to it.