What are some amazing facts about Google or Microsoft?
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The Google reCAPTCHA Project
We have all come across the ubiquitous captcha - the colourful images with distorted text - a reverse Turing test of sorts. These work because no algorithm at present can read distorted text as well as we humans do. However not all the distorted texts are unreadable by machines. About 200 million captchas are solved everyday, amounting to more than 150,000 hours of work each day. Considering the numbers involved, a safe captcha generation system was needed. Enter Google reCAPTCHA. To make a positive use of this immense human effort, the reCAPTCHA channels the effort spent solving captcha online into "reading" books.
To archive human knowledge and to make information more accessible to the world, multiple projects are digitizing physical books that were written before the computer age. The book pages
