Akiyoshi Kitaoka – Surround biased illumination perception

https://x.com/AkiyoshiKitaoka/status/1798705648001327209

 

The left face appears whitish and the right one blackish, but they are made up of the same luminance.

 

 

https://community.wolfram.com/groups/-/m/t/3191015

 

Illusory staircase Gelb effect 
https://www.psy.ritsumei.ac.jp/akitaoka/illgelbe.html

 

 

https://persci.mit.edu/gaz/publications/gazzan.dir/figure20.html

 

 

Figure 20: The snake illusion. All diamonds are the same shade of gray. (a) The regular snake: the diamonds appear quite different. (b) The “anti-snake”: the diamonds appear nearly the same. The local contrast relations between diamonds and surrounds are the same in both (a) and (b).

Back to E. H. Adelson, Lightness Perception and Lightness Illusions

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