This is autopano-sift-2.4 ported to plain "C"
The source is kept as close as possible to the original version.

It should have the same inputs and outputs as the original "C#" version
which is available at http://www.cs.tu-berlin.de/~nowozin/autopano-sift


The only dependencies are:
libpano13, libpng, libtiff, libjpeg, zlib and libxml2

The doc directory contains verbatim copies from the original

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Note from Pablo d'Angelo (pablo.dangelo at web.de):

These files have suddenly appeared on the hugin patches page. It has been
uploaded by an anonymous person. Thank you!

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Upgrade to v. 2.5 March 2008 by TKSharpless (tksharpless@gmail.com)

Internal image data changed from double to float, cutting memory
demand in the keypoint finder by almost half.

New executable autopano-sift-c both finds and matches keypoints
without generating XML files.  It can run under hugin 0.7 as an
alternate control point finder.  When run from the command line it
can read image information from any PanoTools compatible script. 
 
If projection formats and angular sizes of the image are specified,
it converts to stereographic projection, which gives better results 
with wide-angle lenses.

Autopano-sift-c uses the much faster ANN kd-tree for keypoint matching 
(but retains the option to use Nowozin's KDTree code for comparison).

See README-autopano-sift-c.txt for details.

The manpages in share/man are now quite out of date, but are still
installed in hopes someone will be moved to update them.