Google boffins beat own Captchas

  • 23 April 2014
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The StreetView numbers game

By Richard Chirgwin, 22 Apr 2014  A group of Google scientists working on extracting numbers from StreetView images has discovered that their technology can also match humans at solving captchas.
 
The aim, according to their research paper (at Arxiv, here), was to automatically extract accurate street number data from StreetView images so as to improve Google Maps location information.
 Prior work, the researchers write, had worked on extracting individual numbers from an image, identifying each number, and then reassembling the whole street number. This, however, is inefficient, so the group let by Ian Goodfellow focussed on taking an entire image and identifying all the numbers in it.
 
Testing their model on Google's StreetView House Numbers dataset (which contains 200,000 numbers), the researchers found they were able to match human accuracy of 98 per cent with “95.64 per cent coverage”.
 
 
 
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Well, this one got me a thinking...!

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