Difference between revisions of "Adelson's Squares"

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Simlar to the [[Spirals_(Macro)|spirals]] sample, {{GitHub|repo=fiji|path=plugins/Scripts/File/Open_Samples/Adelsons_Squares.ijm|label=Adelson's squares}} demonstrate that human vision is suboptimal for quantitative measurements. In the natural context in which humans developed, it makes sense to compensate for shadows. However, this makes us believe that the two squares with the black diamonds have a different shade of grey, yet they are identical in brightness, or RGB values. Since one is part of the whites, and the other the blacks, our brains, knowing the cherckeboard pattern, fools our perception to believe the "white" square is lighter than the "black" square.  
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Simlar to the [[Spirals_(Macro)|spirals]] sample, {{GitHub|repo=fiji|path=plugins/Scripts/File/Open_Samples/Adelsons_Squares.ijm|label=Adelson's squares}} demonstrate that human vision and perception is error prone for quantitative measurements. In the natural context in which humans evolved, it makes sense to compensate for shadows. However, this makes us believe that the two squares with the black diamonds have a different shade of grey, yet they are identical in brightness (RGB values). Since one is part of the "whites", and the other the "blacks", our brains, recognising the checkerboard pattern, fool our perception to believe the "white" square is lighter than the "black" square, because we unconciously correct for the darker shadow cast by the cylinder.  
  
 
[[File:Adelsons-squares.png]]
 
[[File:Adelsons-squares.png]]

Latest revision as of 11:08, 1 March 2015

Simlar to the spirals sample, Adelson's squares demonstrate that human vision and perception is error prone for quantitative measurements. In the natural context in which humans evolved, it makes sense to compensate for shadows. However, this makes us believe that the two squares with the black diamonds have a different shade of grey, yet they are identical in brightness (RGB values). Since one is part of the "whites", and the other the "blacks", our brains, recognising the checkerboard pattern, fool our perception to believe the "white" square is lighter than the "black" square, because we unconciously correct for the darker shadow cast by the cylinder.

Adelsons-squares.png