Re: Going from simple to super CAPTCHA
| From: | Tijnema | Date: | Tue, 12 Jun 2007 21:00:21 +0000 |
| Subject: | Re: Going from simple to super CAPTCHA | ||
| References: | 1 2 3 4 5 6 7 8 9 10 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-256785@lists.php.net to get a copy of this message | ||
On 6/12/07, Richard Lynch <ceo@l-i-e.com> wrote:
On Tue, June 12, 2007 3:40 pm, Tijnema wrote: A PFP (Pixel-For-Pixel) Approach would do the job, but I don't think there exists software yet for it. I would have to get the file format of the bitmap you're using (PNG I Guess), and then parse it PFP. Oh, the software exists. http://php.net/imagecolorat And I don't really care if it's PNG, GIF or JPEG, really, since GD handles all of those. Yes, I have actually *DONE* this to crack a CAPTCHA in php, and yes, it does actually work. Last I checked, I was cracking the CAPTCHA with a 97% success ratio -- which is pretty dang close to human error margins on the silly things. This is not rocket science. It barely even qualifies as AI Research any more. :-vJust what i've needed, the GD library seems to handle it nicely :) Tijnema