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Advanced Captcha Image

Posted: Mon May 21, 2007 5:40 pm
by ziggy3000
i need a captcha that works and looks like this one

if you could have it used in an example, that would be great! :D

the captcha doesn't have to look like that, but i want it to look web 2.0

Posted: Wed Jun 27, 2007 7:12 pm
by ziggy3000
bump?

Posted: Wed Jun 27, 2007 7:14 pm
by superdezign
ziggy3000 wrote:bump?
No. Shoulda let it die. :P

Why don't you try to make one? GD library perhaps?

Posted: Wed Jun 27, 2007 7:59 pm
by feyd
Yeah, you've tried your hand at creating a 20 page thread on creating a syntax highlighter, why not this too? :P

Posted: Thu Jun 28, 2007 5:49 am
by vigge89
What exactly is one supposed to find in that image? I don't see any text/characters, so the number of lines in the image?
Edit: Or is it missing text becuase nothing was passed to the script? Doh!

Posted: Thu Jun 28, 2007 1:57 pm
by superdezign
feyd wrote:Yeah, you've tried your hand at creating a 20 page thread on creating a syntax highlighter, why not this too? :P
Hehe, it's a thought. I've made a few captchas in my day, but you could always just download a pre-made one. Captcha's aren't very difficult to make, but adding all of that extra graphical stuff takes time (and math).

Posted: Fri Jul 13, 2007 6:32 pm
by ziggy3000
well, i have good news. i have learned enough php to make the exact same captcha image!
well, it's close. i just need help rotating each alphanumeric digit and putting it in a random spot, yet, you can still read it.
and the font seems a little different.
and there's not as many lines, but still works :D

Posted: Fri Jul 13, 2007 6:33 pm
by ziggy3000
vigge89 wrote:What exactly is one supposed to find in that image? I don't see any text/characters, so the number of lines in the image?
Edit: Or is it missing text becuase nothing was passed to the script? Doh!
whoa! the people that made this have changed the url. that's why you didn't see any text

Posted: Sat Jul 14, 2007 1:46 pm
by s.dot
Rather than messing with GD to make the graphical image (which is probably the best idea) you could just make X amount of captcha backgrounds and rotate them in randomly.

Posted: Wed Aug 15, 2007 6:25 pm
by ziggy3000
thats basically what i have done. but to make it harder, i want to rotate the text also

Posted: Wed Aug 15, 2007 6:39 pm
by superdezign
ziggy3000 wrote:thats basically what i have done. but to make it harder, i want to rotate the text also
I just made a pretty good Captcha. Right now I'm working on understanding and deciphering some more advanced distortion techniques.

You can rotate text straight through GD if you use custom fonts (which you realllly should).

Posted: Wed Aug 15, 2007 8:05 pm
by tecktalkcm0391
You found a sample on a site... so why didn't you try searching on it... which will bring you to http://forum.codecall.net/php-tutorials ... tions.html

Posted: Wed Aug 22, 2007 5:17 pm
by SidewinderX
tecktalkcm0391 wrote:You found a sample on a site... so why didn't you try searching on it... which will bring you to http://forum.codecall.net/php-tutorials ... tions.html
Wow that just made me feel really special. :D

Posted: Wed Aug 22, 2007 5:28 pm
by VladSun
In my opinion, if one is going to implement a CAPTCHA image generator, he should begin with understanding various and plenty techniques for image recognition, especially OCR. I have a friend who *was* working for a company which develops antiCAPTCHA software for other SPAM companies. ;) They even developed a voice recognition software for SPAMing forums with accessibility features.

So - I don't think it is an easy job to do ...

Posted: Mon Oct 22, 2007 9:43 am
by DaveTheAve
Why not just use Recaptcha?

http://recaptcha.net/