This is quite impressive. Could you give a little more information about the software used to do the model generation? Are there any publications available, or at least a list of some keywords for which algorithms were used for the feature tracking, calibration, dense matching etc?
How well does the software compensate for the change in altitude of both the aircraft and the terrain? I can see that a section of the model is clearly elevated from the rest; how is this distinguished from an uncontrolled change in altitude of the aircraft?
@numb7rs By taking pictures from several angles you can find corresponding points in the images and basically triangulate them. Usually an algorithm is used that both locates the points in space, *and* the location of the camera for each photo *at the same time*. It's called "bundle adjustment"; there's an article on wikipedia.
@numb7rs I don't know the software but i know Lausanne, and Lausanne is like S.F, just a hill ;) so it is normal and correc to see the cathedral for example way above some other parts. I am not a technician at all, b ut I would guess that the height of the plane ould not affect the result as it is taking 2d pic's which will be joint togehtehr at matching points.
I am a newbie and still don't know what I would use this for?
JimmyPo10 6 months ago
This is quite impressive. Could you give a little more information about the software used to do the model generation? Are there any publications available, or at least a list of some keywords for which algorithms were used for the feature tracking, calibration, dense matching etc?
Alrecenk 9 months ago
I would guess through an altimeter in the plane. All you need to do is add a third input to your GPS location readings and feed it into the software.
silanea 9 months ago
@silanea FYI - GPS automatically includes altitude in its readings.
tsnibur 9 months ago
How well does the software compensate for the change in altitude of both the aircraft and the terrain? I can see that a section of the model is clearly elevated from the rest; how is this distinguished from an uncontrolled change in altitude of the aircraft?
numb7rs 9 months ago
@numb7rs By taking pictures from several angles you can find corresponding points in the images and basically triangulate them. Usually an algorithm is used that both locates the points in space, *and* the location of the camera for each photo *at the same time*. It's called "bundle adjustment"; there's an article on wikipedia.
TimmmmCam 9 months ago
@numb7rs I don't know the software but i know Lausanne, and Lausanne is like S.F, just a hill ;) so it is normal and correc to see the cathedral for example way above some other parts. I am not a technician at all, b ut I would guess that the height of the plane ould not affect the result as it is taking 2d pic's which will be joint togehtehr at matching points.
stevensonjr 7 months ago