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12 fascinating optical illusions show how color can trick the eye
From https://www.washingtonpost.com/news/wonk/wp/2015/02/27/12-fascinating-optical-illusions-show-how-color-can-trick-the-eye/?utm_term=.308c2458a2b5
For example, in this classic shadow illusion by Edward H. Adelson, A and B are the exact same shade of gray:
12 fascinating optical illusions show how color can trick the eye
By Ana Swanson February 27, 2015
The Internet erupted in an energetic debate yesterday about whether an ugly dress was blue and black or white and gold, with celebrities from Anna Kendrick (white) to Taylor Swift (black) weighing in. (For the record, I’m with Taylor – never a bad camp to be in.)
It sounds inane, but the dress question was actually tricky: Some declared themselves firmly in the blue and black camp, only to have the dress appear white and gold when they looked back a few hours later.
Wired had the best explanation of the science behind the dress’s shifting colors. When your brain tries to figure out what color something is, it essentially subtracts the lighting and background colors around it, or as the neuroscientist interviewed by Wired says, tries to “discount the chromatic bias of the daylight axis.” This is why you can identify an apple as red whether you see it at noon or at dusk.
...
Changing a color’s appearance by changing the background or lighting is one of the most common techniques in optical illusions. As the examples below show, colors can change dramatically against different backgrounds. (If you’ve ever held a sock up to something black to see whether it was black or navy, you understand the concept.)
...
By Ana Swanson February 27, 2015
The Internet erupted in an energetic debate yesterday about whether an ugly dress was blue and black or white and gold, with celebrities from Anna Kendrick (white) to Taylor Swift (black) weighing in. (For the record, I’m with Taylor – never a bad camp to be in.)
It sounds inane, but the dress question was actually tricky: Some declared themselves firmly in the blue and black camp, only to have the dress appear white and gold when they looked back a few hours later.
Wired had the best explanation of the science behind the dress’s shifting colors. When your brain tries to figure out what color something is, it essentially subtracts the lighting and background colors around it, or as the neuroscientist interviewed by Wired says, tries to “discount the chromatic bias of the daylight axis.” This is why you can identify an apple as red whether you see it at noon or at dusk.
...
Changing a color’s appearance by changing the background or lighting is one of the most common techniques in optical illusions. As the examples below show, colors can change dramatically against different backgrounds. (If you’ve ever held a sock up to something black to see whether it was black or navy, you understand the concept.)
...
More at link.
5 replies
= new reply since forum marked as read
= new reply since forum marked as read
on edit: I have this app on my phone. I love it. Not optical illusions, but lots of color.
http://i-love-hue.com
I'll try it out.
Catchy name, too.
