[ptx] faster stitcher

[Ed Halley]

Pablo, that all sounds awesome, until you got to the part where you
explained dependencies.  Can you reword it, thinking from the viewpoint
of "I have Hugin and wxGTK/wxWindows and panotools; what do I need to
get, install or change to use vigra and the new stitcher?"

I'll be happy to test the new stitcher thoroughly; most of my images are
off-center rectilinear or equirectilinear and have huge black swaths
that eat up memory and time.

And what will you call the new stitcher?  Are there any Norse myths
about needle-wielders or seamstresses?  ;)

On Sat, 2003-11-22 at 18:44, Pablo d'Angelo wrote:
> Hi,
> 
> Since I already had most things needed to stitch pictures already, I decided
> to write a stitcher that is a bit more efficient than PTSticher. The only
> real optimsation I did was to avoid remapping to many black pixels.
> 
> Currently, it supports all projections panotools support, but only bilinear
> interpolation and not color correction. Feathering is also not done.
> 
> The seam is placed so that pixels close to the image centers are choosen (I
> create something like the credibility image Bruno mentioned, except that its
> contains exactly the distance of the current point to the middle of the
> pic.) The resulting seams look similar to the ones created by PTSticher.
> 
> A small comparison with PTSticher, same pano, same interpolator,
> both compiled in Debug mode and -O:
> 
> PTSticher:
> real    7m57.109s
> user    7m21.200s
> sys     0m8.120s
> 
> My stitcher:
> real    1m55.364s
> user    1m37.900s
> sys     0m2.720s
> 
> The pano consisted of 18 images (1600x1200), the output size was 4800x900. (360°deg
> cylindrical, schweineburg, from my gallery page).
> 
> The stitcher is in the utils directory and need a installation of vigra
> (1.2.0), including impex. The fftw bindings are currently not needed.  I use
> it for reading/writing the files, so that I'm independant of wxWindows an
> can also support more than just 8 bit images in the future.  Hmm, there
> might be conflicts with the vigra include files, if the version packaged
> with hugin doesn't fit to the libs installed on the system. in that case
> just remove hugin/src/include/vigra and "make distclean; make".
> 
> No worries, hugin itself won't depend on a fully installed vigra in the forseeable
> future.
> 
> ciao
>   Pablo
> --
> http://wurm.wohnheim.uni-ulm.de/~redman/
> Please use PGP
-- 
[ e d @ h a l l e y . c c ]