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. 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
