http://www.google.com/recaptcha/learnmore
The TL;DR is that recaptcha uses one word that it knows as the solution and the second is one that recaptcha is determining the answer for. Recaptcha is currently trying to turn print archives of newspapers into normal digital text. So it takes unknown words and has users try to solve it. It then stores the results and starts assigning confidence values to the unknown words. So if you get a answer with a relatively high level of confidence it'll let you through. If you get a brand spanking new word, it'll let you type just about anything. On Thu, Jul 22, 2010 at 9:35 AM, Amit Jain <[email protected]> wrote: > Hi , > > I am a bit confused about how recaptcha works. I have implemented it > using ROR. > > Sometimes even if i specify only one word out of two, it returns true > while sometimes it fails. > > I am really confused and not able to understand the behaviour of > recaptcha. > > Please help me. > > > Thanks > > Amit Jain > -- > Posted via http://www.ruby-forum.com/. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<rubyonrails-talk%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
