BBC: Google wants pictures of bicycles and birds that can defeat image-recognition algorithms, as part of a contest launched to improve the technology.
While it is easy for humans to tell the difference between birds and bikes, computer systems can struggle to do so.
Prize money will be awarded for pictures that can fool image-recognition algorithms, or for new code that cannot be easily fooled.
But pictures of birds riding bicycles will not be allowed in the contest.
Google said it hoped the competition would lead to systems that make fewer errors.
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