up vote 1 down vote favorite
share [g+] share [fb]

Now a days text recognition within image is possible.
For example in Microsoft onenote you can search a text in image. So is it a chance for bots to tweak the CAPTCHA ?
By using the same technique can bots answer some CAPTCHA.

link|improve this question
part of the question belongs to Super User and rest is argumentative rather than a question. – Shamim Hafiz Jun 19 '11 at 17:50
1  
@Gunner: have removed the argumentative part.Thanks :) – Ajinkya Jun 19 '11 at 17:58
feedback

migrated from stackoverflow.com Jun 19 '11 at 21:28

This question came from our site for professional and enthusiast programmers.

3 Answers

up vote 1 down vote accepted

In case you haven't noticed, the text is usually visually garbled and mutilated to make it difficult/impossible for OCRs to work in CAPTCHAs. Non-altered, straightly rendered texts are easy to OCR out. But of course the recognition gets better and better. The race is on, but as humans suffer from difficult texts as well, new approaches are preferable.

link|improve this answer
Ya I observed that many texts are either too simple or too difficult to recognize. – Ajinkya Jun 19 '11 at 18:00
Some strings are so congested that, a human user has no option but to enter a wrong try or click "Try another". – Shamim Hafiz Jun 20 '11 at 5:32
feedback
up vote 1 down vote

http://decaptcher.com/client/

Read there. Not to mention, they also convert scanned books to highlightable digital books by having a sample of users decode the same captcha.

link|improve this answer
1  
I was unaware of this. Is it legal/ ethical ? – Ajinkya Jun 19 '11 at 18:03
@Ajinkya: Surely not ethical, even though it could be legal. – Shamim Hafiz Jun 20 '11 at 5:31
feedback
up vote 0 down vote

Of course the captcha can be deciphered by bots , google's reCaptcha is the work of bots, the bot generates the captcha images it cannot decipher while digitizing real books and then throws it at humans to decipher it . They are continually modifying the code to obscure the text making it more difficult for bots to decipher. But eventually bots do catchup , afterall recaptcha is the work of a bot reading scanned text :)

link|improve this answer
Yes, reading the contents of regular font text is quite trivial, but those present on Captcha are deliberately garbled as much as possible. – Shamim Hafiz Jun 20 '11 at 5:35
feedback

Your Answer

 
or
required, but never shown
discard

Not the answer you're looking for? Browse other questions tagged or ask your own question.