Link List Labor
UK Vereinigtes Königreich (Großbritannien u. Nordirland), Royaume-Uni de Grande-Bretagne et d'Irlande du Nord, United Kingdom of Great Britain and Northern Ireland
Falsche Freunde, Faux Amis, False Friends
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englisch-hilfen - Falsche englische Freunde
(E6)(L?) http://www.englisch-hilfen.de/words/false_friends.htm
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michaelbach - Optical Illusions - Optische Täuschungen - Visual Illusions
von Prof. Michael Bach
(E?)(L1) http://www.michaelbach.de/ot/
Diese Site muß man sich ansehen und die vielen animierten Beispiele ausprobieren!
These pages demonstrate visual phenomena and "optical illusions" or "visual illusions". The latter is more appropriate, because most effects have their basis in the visual pathway, not in the optics of the eye. I selected these based on relative novelty and interactivity. When I find the time I will expand the explanations, to the degree that these phenomena are really understood; any nice and thoughtful comment welcome.
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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
- Freezing Rotation Illusion – a “Best Illusion of the Year” winner
- 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
- Visual Acuity ? Hyperacuity
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
- Gestalt loss in equilumance
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
Space, 3D & Size Constancy
- Müller-Lyer Illusion – test your bisection accuracy
- Moon illusion
- T-illusion
- Luminance Looming
- Shepard: “Turning the Tables”
- Shepard: “Subterranean Terror”
- Missing Corner Cube
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
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