On Fri, 2006-05-12 at 09:47, David Tulloh wrote: > Robert Cummings wrote: > > On Thu, 2006-05-11 at 13:48, tedd wrote: > > > >>At 12:11 PM -0400 5/11/06, Robert Cummings wrote: > >> > >>>On Thu, 2006-05-11 at 11:47, tedd wrote: > >>> > >>>> At 9:28 AM +0300 5/11/06, Dotan Cohen wrote: > >>>> >Hey all, it is possible to parse capcha's in php? I'm not asking how > >>>> >to do it, nor have I any need, it's just something that I was > >>>> >discussing with a friend. My stand was that ImageMagik could crack > >>>> >them. She says no way. What are your opinions? > >>>> > > >>>> >Thanks. > >>>> > > >>>> >Dotan Cohen > >>>> >http://what-is-what.com > >>>> > >>> > >>> > Of course -- it's trivial. > >>> > >>>> All images can be broken down into signals and analyzed as such. If > >>>> you have any coherent data, it will show up. If it has to conform to > >>>> glyphs, it most certainly can be identified. > >>>> > >>>> You want something that's not trivial, take a look at medical imaging > >>>> and analysis thereof. > >>> > >>>Extracting passcodes from captcha text is not what I'd call trivial. > >>>It's one thing to pull trends out of an image, it's quite another to > >>>know that a curvy line is the morphed vertical base of the capital > >>>letter T. Similarly knowing that the intensity of red in an area is > >>>related to the existence of some radioacive tracer agent, isn't quite > >>>the same as knowing that the curvy letter T might be red, yellow, green, > >>>yellow blended to green,. etc etc. The human eye and brain are amazing > >>>accomplishments, and while someday we may match their ability in code, I > >>>don't think it's this year. > >> > >>We've been doing edge detection, noise suppression, data analysis, > >>and OCR for over 30 years. While it may not be obvious, it's still > >>trivial in the overall scheme of things. The bleeding edge is far > >>beyond this technology. > > > > > > Edge detection, noise suppression, and data analysis don't quite equate > > to recognition. Also 30 years of OCR still requires that the sample be > > good quality and conform to fairly detectable patterns. If this is so > > trivial, I await the release of your captcha parser. The spammers would > > probably pay you millions for it. Where exactly is this bleeding edge, > > and where can I read more about it? I think you're quite wholeheartedly > > being naive about the complexity of visual recognition. Prove me wrong. > > I also agree most are breakable. I've done a very small amount of Trivially breakable?? I'm not arguing breakability, I'm arguing against "trivial". Cheers, Rob. -- .------------------------------------------------------------. | InterJinn Application Framework - http://www.interjinn.com | :------------------------------------------------------------: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `------------------------------------------------------------' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
