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by chisophugis
5793 days ago
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reCAPTCHA is bar none the way to go. Not only is is robust, but it also serves a useful purpose---it uses user answers to the reCAPTCHA to digitize books by having users recognize text from scanned books where OCR would perform poorly. http://www.google.com/recaptcha If your captcha doesn't serve a useful purpose besides being a captcha, it's going to be hard to beat reCAPTCHA. |
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