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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Like Hamlet53 mentioned, it probably aggregates a lot of user entries for each word from the reCAPTCHA, and picks the most frequent one as the 'correct' answer to be sent back to the archival system. As far as the barrier purpose goes, it probably already has an approximate answer (but obviously not an entirely satisfactory one) provided by the initial OCR software, and as long as it sees that your answer is close enough to the answer it initially had, you'll get through. I think that's the case because there have been instances where I've not supplied an exact answer, but I've still been let through.