tEABAG_3D now at Rapidshare June 22
wow!
http://habrahabr.ru/blog/humour/45005.html
My calm site ocr-research.org.ua was experiencing 50 hosts per day, and now it’s 3000 for today. Tomorrow, I feel, will be something.
They say, it’s already broken. Maybe, maybe, so I made new version…
contact Jun 30
“They say, it’s already broken.”
Don’t be sad Aleksey,
your captcha isn’t broken (yet). Well I assume you already know this, but anyway the reason, why all the Rapidshare-Anticaptcha-Tools could solve the 3D captchas after a few hours, is that Rapidshare simply didn’t read the “captcha user’s manual” and made the mistake to use a precomputed captcha pool all the time. Since Rapidshare has up to 40 million visits per day the pool was indexed soon.
I can imagine Rapidshare send you some quite angry e-mails because of that but it seems like they finally realized their mistake and now automatically replace the captchas in their pool continuously.
I hope they haven’t given up the 3D-captchas since they removed the nice version from 25 June with 3D-waves, different fonts and high-profiles for the letters and various camera-angles and distances with a rather basic version without any distortion or waves.
http://img47.imageshack.us/my.php?image=25062008gw1.gif
http://img47.imageshack.us/my.php?image=29062008fi5.gif
Hopefully this is just a “placeholder” for the next version, since this one will be broken soon (really broken this time). The simplified version doesn’t make enough use of the actual 3D feature. Maybe their should be even more variety in camera angle, viewing distance and letter positioning, since captchas are a lot about variety.
At the moment you can simply ignore the whole 3D aspect, treat it like an ordinary captcha and beat it with simple pattern matching or OCR-software, if you extract the big white spaces (side of the letter) and the dark areas (edges of the letter and shadows) and run the resulting new picture through OCR.
The fact that you can also see the edges of the 3D-plane makes it even easier, because you can easily rotate the picture to get a better start for your OCR software.
Rapidshare is certainly an ideal captcha-testing platform, since it’s so popular and the incentive to break the captcha is very high because there you can get a lot more than a lousy e-mail account. So I hope they haven’t given up on teabag, it was their fault to use a pool!
Best wishes
admin Jun 30
Thank you, I’m not sad, and not giving up.