[Talk-GB] mapping tunnels

Robert (Jamie) Munro rjmunro at arjam.net
Fri Sep 28 22:39:20 BST 2007


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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


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