Oct 01, 2007
Artificial brain falls for optical illusions
Via New Scientist
A computer program that emulates the human brain falls for the same optical illusions humans do.
It suggests the illusions are a by-product of the way babies learn to filter their complex surroundings. Researchers say this means future robots must be susceptible to the same tricks as humans are in order to see as well as us.
For some time, scientists have believed one class of optical illusions result from the way the brain tries to disentangle the colour of an object and the way it is lit. An object may appear brighter or darker, either because of the shade of its colour, or because it is in bright light or shadows.
The brain learns how to tackle this through trial and error when we are babies, the theory goes. Mostly it gets it right, but occasionally a scene contradicts our previous experiences. The brain gets it wrong and we perceive an object lighter or darker than it really is – creating an illusion
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