Printed circles that appear to move. Colors that seem different in spite of being identical.
in spite of being identical. Everybody loves a good optical illusion, though precisely where the magic happens is still a mystery in many cases.
The pair found specific classes of illusion can be explained by limitations of our visual neurons – cells that process information coming in from the eyes – rather than higher-level processing. It's the same when digital images get compressed: with a photo of a real-world scene, the compression artifacts are more difficult to spot, because the pixels are more jumbled up and varied. In a digital illustration, where lines and borders are fixed and distinct, those compression artifacts tend to stand out.
The researchers posit that neurons have evolved to be as efficient as possible: some are configured to notice very tiny differences in shades, while others are set up to be less sensitive to small differences but much better at detecting large ranges of contrast, which is why the latest HDR TVs look more impressive.
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The brain-bending secret behind hundreds of optical illusions has finally been revealedHarry is a U.K.-based staff writer at Live Science. He studied Marine Biology at the University of Exeter (Penryn campus) and after graduating started his own blog site 'Marine Madness,' which he continues to run with other ocean enthusiasts. He is also interested in evolution, climate change, robots, space exploration, environmental conservation and anything that's been fossilized. When not at work he can be found watching sci-fi films, playing old Pokemon games or running (probably slower than he'd like).
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