[GRASSLIST:7065] Re: i.ortho photo help
luca.penasa at email.it
Tue Jun 7 14:59:16 EDT 2005
Markus Neteler wrote:
>What's the name/number of the camera?
This is the number i see on the photo:
/UAiG 6025 153.26/
Clifford J. Mugnier said me that:
"The camera is a WILD Heerbrugg camera made in Switzerland. The company is
now owned by Leica. The lens type apparently is a Universal Aviogon wide
angle lens. The calibrated focal length is as you stated."
Iv obtained a good work with the metod suggested by Maciek:
"I had a similar problem. Here's what I did:
1 my photos where in written in tiff with correct DPI, so I just
2 opened one in Gimp
3 measured distances between fiducials
4 asked Prof. Pitagoras for help, because I had only 4 fiducials (in
corners) and the photo was fairly rotated
5 image center is 0,0; coords to the left are negative, positive to the
right; [mm] is the unit required in i.ortho.photo
If your DPI isn't properly stored in the image but you know it, measure
distances in pixels, translate to inch -> mm."
Thanks for your help.
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