Editing Optical illusion (section)

== Gallery ==
{{Hatnote|Some images need to be viewed in full resolution to see their effect.}}
<gallery>
File:Illusion movie.ogg|[[Motion aftereffect]]: this video produces a distortion illusion when the viewer looks away after watching it.
File:Mond-vergleich.svg|[[Ebbinghaus illusion]]: the orange circle on the left appears smaller than that on the right, but they are in fact the same size.
File:Café wall.svg|[[Café wall illusion]]: the parallel horizontal lines in this image appear sloped.
File:Optical-illusion-checkerboard-twisted-cord.svg|Checker version: the diagonal checker squares at the larger grid points make the grid appear distorted.
File:Optical-illusion-checkerboard-twisted-cord2.svg|Checker version with horizontal and vertical central symmetry
File:Lilac-Chaser.gif|[[Lilac chaser]]: if the viewer focuses on the black cross in the center, the location of the disappearing dot appears green.
File:Motion illusion in star arrangement.png|[[Motion illusion]]: contrasting colors create the illusion of motion.
File:Subjectively constructed water-color.svg|[[Watercolor illusion]]: this shape's yellow and blue border create the illusion of the object being pale yellow rather than white<ref>{{cite journal|author1=Bangio Pinna |author2=Gavin Brelstaff |author3=Lothar Spillman | title=Surface color from boundaries: a new watercolor illusion| journal=Vision Research| year=2001| volume=41| pages=2669–2676| issue=20| pmid=11520512| doi=10.1016/s0042-6989(01)00105-5|s2cid=16534759 }}</ref>
File:Optical illusion - subjectively constructed cyan sqare filter above blue cirles.gif|Subjective cyan filter, left: subjectively constructed cyan square filter above blue circles, right: small cyan circles inhibit filter construction<ref>{{cite book|first1=Donald D.|last1=Hoffmann|title=Visual Intelligence. How we create what we see|publisher=Norton|year=1998}}, p.174</ref><ref>{{cite journal| author1=Stephen Grossberg| author2=Baingio Pinna| title=Neural Dynamics of Gestalt Principles of Perceptual Organization: From Grouping to Shape and Meaning| journal=Gestalt Theory| year=2012| volume=34| pages=399–482| url=http://gth.krammerbuch.at/sites/default/files/articles/AHAH%20callback/Grossberg_Neural_Dynamics.pdf| issue=3+4| url-status=dead| archive-url=https://web.archive.org/web/20131004222301/http://gth.krammerbuch.at/sites/default/files/articles/AHAH%20callback/Grossberg_Neural_Dynamics.pdf| archive-date=2013-10-04| access-date=2013-07-14}}</ref>
File:Pinna's illusory intertwining effect.gif|Pinna's illusory intertwining effect<ref>{{cite journal| last1=Pinna |first1=B. |last2=Gregory |first2=R.L. |first3=L. |last3=Spillmann| title=Shifts of Edges and Deformations of Patterns| journal=Perception| year=2002| volume=31| pages=1503–1508| pmid=12916675| issue=12| doi = 10.1068/p3112pp| s2cid=220053062}}</ref> and Pinna illusion (scholarpedia).<ref>{{cite journal|title=Pinna illusion|volume=4|issue=2|pages=6656|journal=Scholarpedia|doi=10.4249/scholarpedia.6656|year=2009|last1=Pinna|first1=Baingio|bibcode=2009SchpJ...4.6656P|doi-access=free}}</ref> The picture shows squares spiralling in, although they are arranged in concentric circles.
File:Politeness simulation (LOC cph.3g08085).gif|[[Phenakistoscope]] which is spun displaying the illusion of motion of a man bowing and a woman curtsying to each other in a circle at the outer edge of the disc, 1833
File:Hybrid image decomposition.jpg|A [[hybrid image]] constructed from low-frequency components of a photograph of [[Marilyn Monroe]] (left inset) and high-frequency components of a photograph of [[Albert Einstein]] (right inset). The Einstein image is clearer in [[:File:Hybrid image decomposition.jpg|the full image]].
File:Roman geometric mosaic.jpg|An ancient Roman geometric mosaic. The cubic texture induces a [[Necker cube|Necker-cube]]-like optical illusion.
File:Optical illusion created by spinning disks.webm| A set of colorful spinning disks that create illusion. The disks appear to move backwards and forwards in different regions.
File:Revolving circles.svg|[[Pinna-Brelstaff illusion]]: the two circles seem to move when the viewer's head is moving forwards and backwards while looking at the black dot.<ref>{{cite journal| author1=Baingio Pinna| author2=Gavin J. Brelstaff| title=A new visual illusion of relative motion| journal=Vision Research| year=2000| volume=40| pages=2091–2096| url=http://psy.mq.edu.au/vision/~peterw/corella/315/pinna.pdf| doi=10.1016/S0042-6989(00)00072-9| pmid=10878270| issue=16| s2cid=11034983| url-status=live| archive-url=https://web.archive.org/web/20131005010254/http://psy.mq.edu.au/vision/~peterw/corella/315/pinna.pdf| archive-date=2013-10-05}}</ref>
File:Spinning Dancer.gif|The [[Spinning Dancer]] appears to move both clockwise and counter-clockwise.
File:Europe 2007 Disk 1 340.jpg|[[Forced perspective]]: the man is made to appear to be supporting the [[Leaning Tower of Pisa]] in the background.
File:Grid_illusion.svg|[[Grid illusion|Scintillating grid illusion]]: Dark dots seem to appear and disappear rapidly at random intersections, hence the label "scintillating".
File:Illusion Museum Antwerp - 3.jpg|Building rooms where the furniture is attached to the ceiling makes it appear the two men are upside down.
Optical illusion on the floor of the Duomo Firenze (61458).jpg|Illusion on the floor of the [[Florence Cathedral]]
</gallery>