Google acquires reCAPTCHA (Sept. 17, 2009) — ReCAPTCHA Inc., a spin-off of Carnegie Mellon University’s Computer Science Department, has been acquired by Google.

recaptchaReCAPTCHA developed online puzzles that serve the dual purpose of protecting Web sites and digitizing printed text.

The reCAPTCHA puzzles, which consist of words with distorted letters that computer users must decipher to register for services online or otherwise gain access to a Web site, began as a research project of Luis von Ahn, assistant professor of computer science at Carnegie Mellon.

Like similar CAPTCHA (Completely Automatic Public Turing test to tell Computers and Humans Apart) puzzles, reCAPTCHAs distinguish human visitors to Web sites from automated intruders. But reCAPTCHAs are created using words from printed texts that current optical character recognition programs are incapable of reading.

So when humans solve the puzzle, they also help digitize pre-computer-age books, newspapers and other printed materials.

ReCAPTCHAs were introduced in 2007 and are used by many leading Web sites. The company, ReCAPTCHA Inc., was founded by von Ahn in 2008.

5 thoughts on “Google acquires reCAPTCHA

  • September 17, 2009 at 11:11 am

    I also occasionally see this, but as it has not previously been attached to this value..

  • September 18, 2009 at 2:55 am

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  • September 19, 2009 at 11:42 am

    Thanks for all the answers:) In fact, learned a lot. This is only until the end and not разобрался that and from where..

  • September 20, 2009 at 12:02 pm

    Nice post, but a lot of excess..

  • September 23, 2009 at 5:00 pm

    Compared with the previous post, the sky and the earth..

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