karthik chandrappa asks:
In http://www.makeuseof.com/tag/wanted-captchas-afraid-technology-explained/ James Bruce explains about Google’s reCaptcha project
It presents the user with TWO words – one of which is known. The system assumes that if the user correctly types the known word, then the chances are that the unrecognisable word is also correct.
But my question is suppose if I intentionally entered the second word wrong what would the system do?
Consider following conditions:
a) If I am the first one to pose that word , what will it do if second one also enters wrong word .
b)If I am the second one and enters wrong word.
or else
How many iterations the system typically takes to decide/recognize a word ?
2 Answers -
Laga Mahesa
July 2, 2012Only the chained up demons in Google’s basement know the answer to this, I think.
Tina
July 2, 2012Karthik,
First of all, you don’t know which word is the CAPTCHA and which one is the OCR word. You may guess, but you can’t be sure.
Secondly, most people will try to enter it right and the OCR is not based on one entry, but on dozens or maybe hundreds. Only if close to 100% of inputs agree on what that word reads, is it marked as resolved. Otherwise, it is most likely presented to more people or maybe enters another route of being identified.
So in essence, just try to spell out both words, it’s not worth the hassle to try and disturb the system. And besides, why would you? Digitizing books is a good thing. You are contributing to the preservation of human history and potentially to the education of millions of people.