Stitching photos vertically?

[Adrian Nagle]

I took a few photos of a trail/steps up a mountain that I want to
stitch together. I thought I could simply use the Hugin defaults to
stitch, same as with some panoramas I took on the same day. The
result (shown in the fast preview window when it worked) was a strange
shape. I assume I need to use a different setting/algorithm for
stitching photos that are vertical due to different perspective.

What settings are recommended for this application?

Hugin hangs now with Fast Preview on, so it is more time consuming to
try a bunch of different settings. Something to at least start with
would be helpful.

Thank you.

Adrian

[paul womack]

Adrian Nagle wrote:
> I took a few photos of a trail/steps up a mountain that I want to
> stitch together. I thought I could simply use the Hugin defaults to
> stitch, same as with some panoramas I took on the same day. The
> result (shown in the fast preview window when it worked) was a strange
> shape. I assume I need to use a different setting/algorithm for
> stitching photos that are vertical due to different perspective.
>
> What settings are recommended for this application?

I recently took a set (I only have a 35mm lens on my P&S camera)
of a factory chimney, closeup. Stitched fine with no special actions
on my part.

BugBear

[Adrian Nagle]

Thanks, I'll try again. The points Hugin selected appeared to match
up correctly. I ran into problems with the fast preview and haven't
tried since (unless that was part of what caused the issue).

Adrian

[Frederic Da Vitoria]

2011/8/3, Adrian Nagle <ana...@gmail.com>:

> Thanks, I'll try again. The points Hugin selected appeared to match
> up correctly. I ran into problems with the fast preview and haven't
> tried since (unless that was part of what caused the issue).

I just realized the implications of the subject of your pictures. Are
your CPs in foliage? are they roughly in the same plane? Could you
have moved your camera more than for a horizontal panorama?

--
Frederic Da Vitoria
(davitof)

Membre de l'April - « promouvoir et défendre le logiciel libre » -
http://www.april.org

[kfj]

On 3 Aug., 15:25, Adrian Nagle <ana...@gmail.com> wrote:
> I assume I need to use a different setting/algorithm for
> stitching photos that are vertical due to different perspective.

It looks like you're mixing up two things here.

- vertical stitches just as well as horizontal.

- different perspective only works as a mosaic of planar surfaces

for a panorama to stitch, you need to take all images with the NPP of
your lens in the same place (preferably to the millimetre). Everything
else produces parallactic differences between the images, which hugin
can only compensate for if the subject is planar.

Kay

[Gnome Nomad]

I've done a couple of vertical panos. Ones I did before switching to a
more current Hugin on aptosid worked fine. The last one I tried since
the switch didn't stitch properly until I rotated each vertical image 90
deg clockwise, then used those in Hugin. Hugin reported some warning
about some projection producing errors with large vertical panoramas.
And it did display wildly wrong - top image stretched and distorted all
across the top and curving down toward the outside bottom corners of the
image.

--
Gnome Nomad
gnome...@gmail.com
wandering the landscape of god
http://www.cafepress.com/otherend/

[Bruno Postle]

On Wed 03-Aug-2011 at 07:25 -0600, Adrian Nagle wrote:
>I took a few photos of a trail/steps up a mountain that I want to
>stitch together. I thought I could simply use the Hugin defaults to
>stitch, same as with some panoramas I took on the same day. The
>result (shown in the fast preview window when it worked) was a strange
>shape. I assume I need to use a different setting/algorithm for
>stitching photos that are vertical due to different perspective.

Basically the Assistant tab is limited to 'normal' panoramas, in
particular it runs the Hugin 'straighten' function which doesn't
work so well with a single column of photos, or with a single
stack - It doesn't place the panorama in the centre of the output.

The workaround is to just open the preview window and manually move
the photos to the centre, then adjust the projection and angle of
view to suit.

--
Bruno

[Karmadillo]

On Aug 3, 11:25 pm, Adrian Nagle <ana...@gmail.com> wrote:
> I took a few photos of a trail/steps up a mountain that I want to

> stitch together.  I assume I need to use a different setting/algorithm for

> stitching photos that are vertical due to different perspective.
>
> What settings are recommended for this application?

When I stitched similar subjects, the following worked for me:
Rectilinear projection type. Select this on the preview window or
stitcher tab.
In the preview tab, switch to drag / move mode, drag the photo closest
to horizon level to the very centre of the preview window.
Set the vertical field of view to maximum (slider at right of preview
window).
Reduce the horizontal field of view to reduce the black space to the
left and right of your pano.
Crop the black area from the bottom of the preview window.