Hi David!
[email protected] wrote on 07.06.16 21:25:
P.S. Within the Hugin program a cylindrical lens provides me with a
rectangular preview resembling the original save file while the
rectilinear lens gives a preview with rounded edges? Is this normal,
what is the reason the edges are rounded in the rectilinear option?
What you see in the preview window is just a reprojected version of your
image. The standard output projection for Hugin projects is
equirectangular (aimed at e.g. full spherical panoramas to be viewed in
a special viewer).
A usual camera with a standard (wide angle) lens (e.g. also the built-in
lens from a smartphone) produces input images with rectilinear
projection. Some special lenses widely used for panoramic photography
use fisheye projection.
Here is a nice comparison: <http://wiki.panotools.org/Projections>
Now when you define your input image as using a cylindrical projection
just to have a familiar looking preview there are two misconceptions:
- a camera that provides you with photos (I tend to describe photos as
"input images" for Hugin) with a cylindrical projection exists but is
somehow unusual.
See <https://en.wikipedia.org/wiki/Horizon_%28camera%29>
- if you need to output a rectilinear image (and see that in the preview
window), just set output projection to rectilinear. Be aware that this
would lead to absurd looking results if you stitch images that together
span over a lot more than 90 degrees since that projection
mathematically can only cope with a relatively small field of view. See
the panotools wiki -> Projections link.
So what do you want to achieve: just correct one image for e.g. barrel
distortion? Stitch a small number of photos to get a partial panorama
from e.g. a lookout point in the mountains? Stitch a full spherical
panorama? Or something completely different?
I count 32 images in your pto file, what kind of camera and lens do you use?
Cheers,
Carl
--
A list of frequently asked questions is available at:
http://wiki.panotools.org/Hugin_FAQ
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