PanoTools:
Re: How do you shoot the Nadir?
tflyfish2002 2006-May-12 19:30:56
Floors are easy to deal with, I actually use the Masking from
PhotoShop and with PTGui to do this.
I am talking about non-flat Nadir's such as a small boat where
parallax is a big problem. One other solution would be to invert my
spherical pano head over the object and deal with a much easier
Zenith, but this would be a little impractical in the field.
Bazzer
--- In #removed#, Roger Howard <rogerhoward@...> wrote:
>
>
> On Friday, May 12, 2006, at 10:10AM, tflyfish2002 <Bazzer@...> wrote:
>
> >You are right about the parallax, Mike Thoby does it well with his
> >rig, but it is very complex for me and not commercially available. I
> >am thinking about using two small lazer pointers attached to the
> >camera to give me the correct distance, Dam Busters style.
> >Hand holding is very hit or miss. Lowering the shooting rig can be a
> >help, I am thinking of a short monopod with a weighted base instead of
> >a tripod.
>
> I rarely shoot nadir shots, but why would parallax be a problem for
most floors? We're talking about filling in a pretty small hole in the
floor directly below the photog, which is presumably a (relatively)
flat plane. Unless you're standing on a steel grate (a catwalk
perhaps) with lots of subject detail at a distance below the surface,
I can't see how parallax is much of a problem.
>
> Just do what others have suggested - remap to cube faces... remap
the nadir... and skew/distort/mask into place. For the vast majority
of nadir shots that should be easy and parallax free (since we tend to
walk on flat surfaces, not ones with massive variations in depth!).
>
> -R
>
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