Hi Bruno

On Jun 11, 4:17 am, Bruno Postle <[email protected]> wrote:
> On 11 June 2010 02:34, Tom Sharpless <[email protected]> wrote:
>
>
>
> > OK, now I see the (multirow/stacked) CP option.
>
> > I tried it out on an 8-shot fisheye spherical pano. It ran pretty slow
> > (mainly because of the poor k-d tree implementation in autopano),
>
> Also reading and writing the .key XML files takes up a lot of the time.
>
> > could not place the zenith and nadir shots, and aligned the others
> > badly, but with the right arrangement.
>
> The generatekeys/autopano pair doesn't deal well with fisheye images.
> So this multi-row feature is currently only really suitable for narrow
> field-of-view photos.
>
> > Perhaps it is not fair to test a 'multirow' algorithm on an image set
> > with one 'row' and two 'caps'.  But a practical 'grid' method ought to
> > handle spherical arrangements as well.
>
> It will, but the plan is to add fisheye support to Pablo's
> libpanomatic tool rather than continue with the distribution problems
> of autopano-sift-c.
>
> Do try it with a real multirow project. My experience with a 5x35
> 'gigapixel' project is that it just works, and although it isn't fast,
> it scales linearly with the number of photos.
>
> In the past you proposed a binary memory-mapped format for temporary
> .key files, this would improve the speed considerably.

Even plain text would be way faster.  XML parsing takes a lot of
bandwidth.

>
> Antoine Deleforge will hopefully tackle some of these issues with his
> Summer of Code project. It would be a great help if you could follow
> the progress and chip in where necessary.

That is good news, and I will certainly try to help.

-- Tom


>
> --
> Bruno

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