Quote:
Originally Posted by PeterT
Maybe I am confused... How on earth can an answer to a RECAPTCHA help OCR? In order for you tp get through the check, you have to type the letters that correspond to the image.
In order for RECAPTCHA to know you are correct, it has to compare your result to it's known result.
So to my eyes that says that the image has already been decoded at least once.
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That's why there are two nowadays. One is a true OCR item, the other is made to order, so that it does, indeed, know the answer. Usually, the less legible one is the known one; the more legible is usually the real OCR one.
What's less well known is that some spam operations operate "free" porn sites for the specific purpose of getting people to decipher the OCR stuff, which they then use to sign up for free email accounts (having gotten the image from the sign up page for the email). This allows them to completely automate the process of getting free email accounts to spam from. The sad thing is, these are the less slimy spammers.