Navigating whilst driving through tunnels can be helped by reading the cars computer, connecting to its OBD / ECU - you can get at least rpm and speed, along with a whole load of other stuff - You can also tie into the indicator lights (useful if there's a junction underground)
Its what the navtech vans use when they go underground (with a gyroscope) On 9/28/07, Robert (Jamie) Munro <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Robert (Jamie) Munro wrote: > > Thom Shannon wrote: > >> actually ASN looks a bit smarter than that. > > > >> Here's another crazy idea. Use a video camera close to the road (I have > >> a bullet cam that can be mounted on a car) then pattern match the images > >> to track motion (like an optical mouse does) then combine that with a > >> trace from a digital compass. Then by taking gps readings at either end > >> of the tunnel you can calibrate those traces to counter cumulative > >> error. You should then be able to get a really accurate trace. > > > > You might be better off using a ordinary forwards facing camera, and > > match-mover software (like boujou) that the use in movie effects to work > > out the camera movement and add virtual elements. There seems to be a > > free match-mover (camera tracker) package at > > http://digilab.uni-hannover.de/docs/manual.html > > that's probably worth a try. > > Sorry, that should be > > http://www.digilab.uni-hannover.de/docs/manual.html > > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.6 (Darwin) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFG/XSGz+aYVHdncI0RAu+9AKDQIT9jis8rWIbRbHFSJLJjBlbb5ACgmSbv > 9ugtTPGiS5tQPjByX6m3hPY= > =QN6N > -----END PGP SIGNATURE----- > > _______________________________________________ > Talk-GB mailing list > [email protected] > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb > _______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk-gb
