Nach meinem letzten Beitrag zu „Die Wahrnehmung ist relativ“ habe ich soeben eine wahre Fundgrube ganz ähnlicher Phänomene im Netz gefunden:
60 Optical Illusions & Visual Phenomena
(Visual Illusions – Optische Täuschungen) by Michael Bach, University of Freiburg, Germany
Einfach mal bei michaelbach.de/ot/ vorbeischauen. Ach ja, man sollte aber schon einen aktuellen Flashplayer haben um die Sachen zu sehen…
Motion & Time
- »Stepping feet« illusion 1 – strong, beautiful and (relatively) easy to understand
- Motion Induced Blindness – an unexplained optical illusion of disappearing dots
- Stereokinetic Phenomenon – an optical illusion of 3D from motion (aka »kinetic depth effect«)
- »Rotating Snake« Illusion – with a new explanatory twist
- Pinna-Brelstaff Illusion
- Motion Aftereffect – also known as »waterfall effect«
- Spoke Illusion – a motion illusion + an unexpected (?) aftereffect
- Stroboscopic Artifacts – making a teaching point out of a nuisance
- Sigma Motion – an optical illusion due to an interaction of image dynamics and eye movements
- Eye Jitter – more on eye movements, involuntary ones
- Biological Motion – for me the most beautiful class of visual illusions
- Flash-lag Effect – moving and stationary objects perceived at different times
- Ramp Aftereffect – an aftereffect in time
- Enigma by Isia Leviant
- Reverse Phi Motion – something for the specialist
- »Stepping feet« illusion 2 – radial version of »Stepping feet 1«, weaker
- Motion-Bounce Illusion – sound influencing perception of motion (crossmodally)
- Motion Binding
- Missing-fundamental motion inversion
- Frequency-doubling illusion
Luminance & Contrast
- Hermann’s Grid – fleeting luminance illusions
- Hermann’s Grid bent – a new twist, refuting the classical explanation
- Scintillating Grid – strong fleeting luminance illusions
- Induced grating – classical brightness contrast
- Craik-O’Brien-Cornsweet – collaboration of retina & cortex
- Wertheimer-Koffka-Ring – pitting Gestalt vs. lateral inhibition
- Simultaneous Contrast – here dynamic
- Pyramid Illusion – Vasarely revealed
- Munker-White Illusion – contrary to lateral inhibition
- Adelson’s »Corrugated Plaid« – context affecting brightness
- Adelson’s »Checker Shadow« illusion – more context affecting brightness
- Contrast Constancy – demonstrating space-average-based contrast gain control
- Contrast Gain Control – demonstrating temporal contrast gain control
Colour
- »Lilac Chaser« – a rapid aftereffect, you pursue colours which aren’t really there
- Benham’s Top – colour from spatio-temporal patterns
- Neon Colour Spreading
- Structure from motion – fails at equiluminance
Geometric- & Angle Illusions
- Hering Illusion – and other angular interactions
- Poggendorff Illusion – a classical geometric optical illusion with a new twist
- Fraser’s Spiral
- »Café Wall« Illusion
Size Constancy
- Müller-Lyer Illusion – test your bisection accuracy
- Moon illusion
- T-illusion
- Luminance Looming
- Shepard: „Turning the Tables“
- Shepard: „Subterranean Terror“
Cognitive- / Gestalt Effects
- Blur & picture content – spatial filtering (or high frequency masking)
- Hidden message – blur & figure-ground discrimination
- Kanisza’s Triangle – depends on context
- Blotted letters – Gestalt completion
- Hidden Figures – Dalmatian Dog with 2 helpers
- Rotation – changes the interpretation
- Impossible Objects – draw your own impossible object
What’s special about faces?
- Rotating face mask – hollow faces
- Find the Face (in the Beans) – a picture puzzle
- The face on Mars – imaginations of perception
- The »Thatcher Illusion« – inverted faces lose their emotional message
- Dr. Angry and Mr. Smile – two messages in two spatial frequency band
- The Lincoln Effect