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Ehrenstein Illusion
The Ehrenstein illusion is an optical illusion studied by the German psychologist (1899 – 1961) in which the sides of a square placed inside a pattern of concentric circles take an apparent curved shape. File:Ehrenstein.svg, Original Ehrenstein illusion, where a square appears curved when placed inside of concentric circles File:Ehrenstein Illusion.svg, Alternative Ehrenstein illusion, where the ends of the dark segments produce the illusion of circles or squares File:Ehrenstein figure.svg, The illusion of a bright central disk (above) is destroyed by adding a circle (bottom). The monochromity of the piece further adds to the effect of this square appearing to become curved, a common illusion many associate with the umbrella term of optical illusions. Sometimes the name "Ehrenstein" is associated with one of the illusory contour figures where the ends of the dark segments produce the illusion of circles. The apparent figures have the same color as the background, but appe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Optical Illusion
Within visual perception, an optical illusion (also called a visual illusion) is an illusion caused by the visual system and characterized by a visual perception, percept that arguably appears to differ from reality. Illusions come in a wide variety; their categorization is difficult because the underlying cause is often not clear but a classification proposed by Richard Gregory is useful as an orientation. According to that, there are three main classes: physical, physiological, and cognitive illusions, and in each class there are four kinds: Ambiguities, distortions, paradoxes, and fictions. A classical example for a physical distortion would be the apparent bending of a stick half immerged in water; an example for a physiological paradox is the motion aftereffect (where, despite movement, position remains unchanged). An example for a physiological fiction is an afterimage. Three typical cognitive distortions are the Ponzo illusion, Ponzo, Poggendorff illusion, Poggendorff, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ritsumeikan University
is a private university in Kyoto, Japan, that traces its origin to 1869. With the Kinugasa Campus (KIC) in Kyoto, and Kyoto Prefecture, the university also has a satellite called Biwako-Kusatsu Campus (BKC) and Osaka-Ibaraki Campus (OIC). Today, Ritsumeikan university is known as one of western Japan's four prestige private universities. "KAN-KAN-DO-RITS" 関関同立 (Kwansei Gakuin University, Kansai University, Doshisha University, and Ritsumeikan University) is the abbreviation that refers to the four leading private universities in the region of 20 million people. Ritsumeikan University is renowned for its International Relations (IR) and Science & Engineering departments, with the Graduate School of International Relations being the only Japanese member of the Association of Professional Schools of International Affairs. Ritsumeikan University has exchange programmes with schools throughout the world, including The University of British Columbia, The University of Melbou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illusory Contour
Illusory contours or subjective contours are visual illusions that evoke the perception of an edge without a luminance or color change across that edge. Illusory brightness and depth ordering often accompany illusory contours. Friedrich Schumann is often credited with the discovery of illusory contours around the beginning of the 20th century, but they are present in art dating to the Middle Ages. Gaetano Kanizsa’s 1976 ''Scientific American'' paper marked the resurgence of interest in illusory contours for vision scientists. Common types of illusory contours Kanizsa figures Perhaps the most famous example of an illusory contour is the Pac-Man configuration popularized by Gaetano Kanizsa. Kanizsa figures trigger the percept of an illusory contour by aligning Pac-Man-shaped inducers in the visual field such that the edges form a shape. Although not explicitly part of the image, Kanizsa figures evoke the percept of a shape, defined by a sharp illusory contour. Typically, the sha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scholarpedia
''Scholarpedia'' is an English-language wiki-based online encyclopedia with features commonly associated with open-access online academic journals, which aims to have quality content in science and medicine. ''Scholarpedia'' articles are written by invited or approved expert authors and are subject to peer review. ''Scholarpedia'' lists the real names and affiliations of all authors, curators and editors involved in an article: however, the peer review process (which can suggest changes or additions, and has to be satisfied before an article can appear) is anonymous. ''Scholarpedia'' articles are stored in an online repository, and can be cited as conventional journal articles (''Scholarpedia'' has the ISSN number ). ''Scholarpedia''s citation system includes support for revision numbers. The project was created in February 2006 by Eugene M. Izhikevich, while he was a researcher at the Neurosciences Institute, San Diego, California. Izhikevich is also the encyclopedia's editor-i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kanizsa Triangle
Illusory contours or subjective contours are visual illusions that evoke the perception of an edge without a luminance or color change across that edge. Illusory brightness and depth ordering often accompany illusory contours. Friedrich Schumann is often credited with the discovery of illusory contours around the beginning of the 20th century, but they are present in art dating to the Middle Ages. Gaetano Kanizsa’s 1976 ''Scientific American'' paper marked the resurgence of interest in illusory contours for vision scientists. Common types of illusory contours Kanizsa figures Perhaps the most famous example of an illusory contour is the Pac-Man configuration popularized by Gaetano Kanizsa. Kanizsa figures trigger the percept of an illusory contour by aligning Pac-Man-shaped inducers in the visual field such that the edges form a shape. Although not explicitly part of the image, Kanizsa figures evoke the percept of a shape, defined by a sharp illusory contour. Typically, the shap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
