miércoles, 15 de febrero de 2023

Ilusiones ópticas


Illusions & Visual Phenomena
Al mirar este mapa algunas de las «calles verdes» en la visión periférica parecen trazar curvas. Pero al comprobarlo con más cuidado mirando directamente, se ve que son rectas… y entonces esas mismas curvas parecen moverse y aparecer en otros sitios. En realidad todas son rectas.

151 Illusions & Visual Phenomena

with explanations



— Select one —

full tourstepping feetMotion AdaptationReverse Phi IllusionsnakesnakesnakeMotion Induced Blindness IllusionKinetic Depth EffectsilencingPinna-BrelstaffPinna-Brelstaff2ScanimationRoget IllusionReverse Spoke Illusionwagon-wheel Illusioncolor wagon-wheel Illusionstroboscopic IllusionSigma IllusionEye JitterEye JitterRelative motionBiological Motionflash lagRamp IllusionEnigmafreezing rotationradial stepping feetMotion Bounce IllusionTusi MotionBreathing Square IllusionmissingFundamentalIconfrequencyDoubling IconkaleidoscopeIconTernus IconSAM“Pigeon Neck”Psychokinematic IconDotted Lines IconMotion AdaptationhermannGridIconhermannGridCurvedIconGrid IllusionsGrid IllusionsMoiréMoiréPulfrichClassic simultaneous brightness contrast with probesInduced Grating IllusionLozengesCOBCKoffka Luminance IllusionMach BandsSimultaneous Contrast IllusionPyramid IllusionMunker-White IllusionAdelson Brightness Illusioncheckerboard shadowsaccadic suppressionContrast IllusionContrast Illusioncontrast gain controlLazy ShadowVernier & acuitygrid maskinglum-shapeFromShadingEhrenstein diskscoloured afterimgswatercolorchromostereopsiscoloured afterimgsColour FanBenham Top Color IllusionBenham Top unrolledColour AssimilationNeon IllusionSeasonal variant of White's illusionNeon IllusionMotion at equiluminanceGestalt at equiluminanceGestalt at equiluminancemore equiluminancecolour mixturecolour matchincolour phidressdressdressColor Change illusion iconColor from contour flankers iconOblique GratingOblique Grating adjustableTilted TableHering IllusionsPoggendorff IllusionArch IllusionFrazer IllusionTilt IllusionCafe Wall IllusionTriangle PuzzleOblique grating simplestChecker BulgeBourdon IllusionJastrow IllusionPeripheral Curved Lines IllusionMüller-Lyer IllusionMoon IllusionT illusionsine illusionluminance loomingShepard tableshepard monsterSize ConstancyreverspectiveNecker Cubemissing Corner CubeAmes Windowsilhouette illusionwireframe / silhouetteFrankfurterAnamorphosisleaning towersBlind SpotDarwin IllusionBlur IllusionBlur IllusionDiamonds or squaresKanizsa IllusionBlotted Letter IllusionDalmatianHidden BirdHidden object in brick wallRotation IllusionsDelboeuf IllusionEbbinghaus IllusionDynamic Ebbinghaus IllusionPop-out in visual searchHollow Face IllusionFace on MarsChurch or chickenThatcher IllusionGhostly Gazeblurred facesface mosaicface mosaicMotion Bounce IllusionMissing fundamental sound illusion

Some History / What’s new

2023-01-07  simplest oblique

2022-11-23  Diamonds/squares

2022-09-15  Relative motion

2022-03-01  Size Constancy

2021-12-16  curved lines

More… 

Recognition, Awards (outdated)

Optical illusions don’t “trick the eye”, nor “fool the brain”, nor reveal that “our brain sucks”, … but are fascinating!

They also teach us about our visual perception and its limitations. My selection here emphazises beauty and interactive experiments; I also attempt explanations of the underlying visual mechanisms where possible. Returning visitor? Check →here for History/News

»Optical illusion« sounds derogative, as if exposing a malfunction of the visual system. Rather, I view these phenomena as highlighting particular good adaptations of our visual system to its experience with standard viewing situations, confronted with an atypical situation. These experiences are based on normal visual conditions, and thus under unusual contexts can lead to inappropriate interpretations of a visual scene (=“Bayesian interpretation of perception”).

If you are not a vision scientist, you might find my explanations too highbrow. That is not on purpose, but vision research simply is not trivial, like any science. So, if an explanation seems gibberish, simply enjoy the phenomenon 😉.

Do illusions reveal something about my personality?

More material

Book (in German): “… Täuschungen … Sehphänomene”

2022_Bach_Sehphaenomene






Motion & Time

Luminance/Brightness & Contrast

Colour

Geometric & Angle Illusions

Space, 3D & Size Constancy

Cognitive / Gestalt Effects

Specialties with faces

Auditory Illusions


Via https://michaelbach.de/ot/

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