[Talk-GB] mapping tunnels

Bruce Cowan lists at bcowan.fastmail.co.uk
Fri Sep 28 15:19:40 BST 2007

On Fri, 2007-09-28 at 15:10 +0100, Robert (Jamie) Munro wrote:
> Hash: SHA1
> 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.
> Jamie

I remember people saying Wii controllers could be used when this subject
came up a few months ago.
Bruce Cowan <bcowan at fastmail.co.uk>

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