On Wed, 25 Nov 2009, Seb Perez-D wrote:

> On Tue, Nov 24, 2009 at 20:49, wb <[email protected]> wrote:
>> autopano-sift and autopano-sift-C have problems with a panorama of six
>> 4000x3000 images.  Images end up upside down or twisted, and not
>> related to each other at all.  panomatic has no trouble with the same
>> images.
>
> Is the problem that you cannot find control points between the images
> in autopano-sift, or that the control points are bad?

The control points appear to be fine.  It's the position of the images 
that is completely wrong.  In this simple left-to-right set of images, 
the roll angles are detected as:

12.9
-173
167.2
-19.4
-0.7
13.9

Turns out there is a 10M per file limit preventing upload of an archive 
of all the pictures anyway.  I've put them here temporarily:

http://www.wonkity.com/~wblock/autopano-sift/

There's a readme.txt there also with steps to duplicate the problem.

> I find it difficult to believe that this is a resource problem: do you 
> see any output on the command line that looks suspicious? I've run 
> APSCpp on several large projects (+100 images) and have not recently 
> had any issues.

I'm probably too ignorant on what would be suspicious to be helpful 
there.

> If the control points are bad, you could try using cpclean.
>
> If you do not find control points, have you tried changing the maxdim
> parameter?

Tried adding --maxdim 4000 to the autopano-sift command line just now. 
It takes much longer to run, of course.  The first (0/1) and last (4/5) 
pair of images are aligned with each other.  #2 is upside down and 
misplaced, and #3 is just misplaced.

> If the images are from a fish-eye or a ultrawide angle lens, have you 
> tried using the stereographic projection feature?

Just a Canon SD950 point-and-shoot at its widest angle (36mm equiv).

-Warren Block * Rapid City, South Dakota USA

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