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Remember the dress? Here’s why we all see colors differently (video) - C C - Sep 24, 2019
https://www.wired.com/story/remember-the-dress-heres-why-we-all-see-colors-differently/
INTRO: When The Dress went viral in 2015—driving tens of millions of online onlookers into existential conniptions over whether the garment was blue and black or white and gold—it didn't just break the internet, it broke color science as researchers had conceived of it up to that point.
Never before had scientists observed such stark differences of opinion over the color of an object. A popular hypothesis for why people saw the dress differently was color constancy—a perceptual phenomenon by which an object appears to stay more or less the same color, regardless of the lighting conditions under which you see it. It's an incredible feature of human vision, albeit one that researchers have long used against you in the form of visual illusions.
Take this photo, for example, which was created by Japanese psychologist Akiyoshi Kitaoka: [see article for image] The berries look red, right? They're not. In fact, there are no red pixels in that image.
[...] For the latest episode (video) in our series on the science of illusions, we invited Stanford neuroscientist David Eagleman to help us tackle color constancy... (MORE - video)