The OCR capacity of recaptcha
From Prof. von Ahn:
…about 100 million words/day, or the equivalent of 2.5 million books/year
via this TEDxCMU talk about Luis von Ahn’s new company, duolingo:
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Help correct OCR in Finnish newspapers by playing games
Digitalkoot is a joint project run by the National Library of Finland and Microtask. Our goal is to index the library’s enormous archives so that they are searchable on the Internet. This will enable everyone to easily access our cultural heritage.
You can help us by playing games.
Playing games in Digitalkoot fixes mistakes in our index of old Finnish newspapers. This greatly increases the accuracy of text-based searches of the newspaper archives.