[Qgis-user] IR-airphoto and 3D

[Ulf Almroth]

Johan,
What you need is a photogrammetric package. I only know one open source 
package. Look at http://www.efoto.eng.uerj.br/en:start and download the 
latest version. It has all you need to accomplish your task, includning a 
modul for DEM (digital elevation model) extraction from the stereo pair. Yoy 
dont need dual screens, fancy cards and polaroid glasses. A split screen or 
re/blue glasses like som childrens books had when I was a kid will do. Note: 
I found this package recentlly and had no time to test it, but I am going 
to. There used to be another free package,  photomodeler, but i don't think 
it is free anymore and anyway it is phocused on terrestrial and not on 
aerial images.

Ulf Almroth


----- Original Message ----- 
From: "Johan Nilsson" <joni8135 at gmail.com>
To: <qgis-user at lists.osgeo.org>
Sent: Monday, April 26, 2010 3:01 PM
Subject: [Qgis-user] IR-airphoto and 3D


>I have very little knowlight of terminology in this area.
>
> Is there a possibility if you have 2 semi-overlapping IR-photo, with
> known flight-altitude, distance between picture, camera-model and
> pictures corners coordinat, to make a 3D model with height-data?
>
> To use 2 pictures to get "stereo-vision", requere quite special
> dual-screens and gfx-card and polaroid-glasses, so to skip this, are
> there some other software that can pick altitude for every pixel in
> the area  there 2 IR-photo cover?.
>
> If not QGIS have this, is there any other open source-applications to
> use, for instance GRASS that manage this, and what is the name of the
> process to make a 3D-map from at leaste 2 airphoto in GIS-terminology?
>
> /Cheers
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