PanoTools NG:
Re: How many shots for a 360x180 with the Sigma 8mm?
sheldonison 2007-Mar-14 09:17:19
Thanks Roger!!!
I really appreciate the explanation and both of your posts. It helps
to see that there really is a nadir and a zenith, but the nadir is so
small as to be filled in with a tiny "camera" that you post process
into your hands.
You have a very creative work flow.
- Shel
--- In #removed#, "Roger Berry" <onezebra1@...> wrote:
>
> Here's a pano 4 shots with Sigma 8mm that I have not worked on yet,
> as you can see there are some errors in all 4 directions, but all
> very easy to fix. As for that tractor, there's sand all around it so
> it's very easy to remove and I don't want to see it anyway. What
> will take longer it removing the power lines in front of the trees
> and some of the poles.
> http://www.camelphotos.com/india2/pushkar_overview.html
>
> Roger Berry
>
>
>
>
> --- In #removed#, "sheldonison" <shel@> wrote:
> >
> > How many shots are required for a 360x180 panorama with the Sigma
> 8mm?
> >
> > I see 360x180 panoramas by Roger Berry, apparantly taken with only
> > four photos using the Sigma 8mm. Also, I find that having a very
> > accurate NPP is important to stitching my panoramas; and yet Roger
> > shoots with a monopod (or a pole), resting on his toe, while sitting
> > on a camel, apparently without even using a level to keep the NPP
> > constant. Does this take a lot of post processing, to correct for
> > NPP errors, and to fill in the zenith and the nadir? How difficult
> is
> > it to get a 360x180 with the sigma 8mm w/out a nadir/zenith shot?
> >
> > For reference, I have a pentax 10-17mm fisheye, and for my 360x180
> > panoramas, I shoot 6/1/1. Here are my first two 360x180 panoramas
> > with the nadir patched, from Austin, TX. My methodology takes a lot
> > of manual work to get the control points to line up for the nadir.
> I
> > defish the nadir, and then manually generate control points between
> > the nadir and the six other images. Then I have ptgui optimize the
> > defished nadir as a rectalinear imasge with FOV and shift
> parameters,
> > and finally I reoptimize everything.
> > - Shel
> > http://www.sheltx.com/share_stuff/PANP1764.html
> > http://www.sheltx.com/share_stuff/PANP1776.html
> >
>
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