PanoTools NG:
Why do I have to optimise g and t (sheer)?
Steinar Midtskogen steinar@... 2015-May-16 18:51:10
Hello,
I'm using autooptimiser to map pixel positions to azimuth and altitude.
That is, I'm only using a single image plus a dummy 360x180 degree
equirectangular image (which has a direct mapping between az, alt and x,
y). I do this by tracking stars, plate solving (star identification)
and use the results as control points.
The result is a .pto file like this: http://voksenlia.net/test/lens.pto
Running autooptimiser like this:
autooptimiser -n lens.pto -o lens2.pto
gives me a reasonable result, which I've visualised here:
http://voksenlia.net/test/grid.jpg
However, if I in the lens.pto file above comment out "v g0" and "v t0",
the result is always very bad:
http://voksenlia.net/test/grid2.jpg
The lens is a (full frame) fisheye lens. Do the g t parameters have a
special meaning in this case, and must be included in the optimisation?
--
Steinar Midtskogen
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Posted by: Steinar Midtskogen <#removed#>
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