[ptx] autopano: first attempt at semi-automatic panorama stitching

[Pablo d'Angelo]

On Tue, 30 Dec 2003, Yili Zhao wrote:

> Hi,
>   some codes and papers' reference:
> > The VIGRA library already contains a Harris corner detector.
> I remember that Pablo said that citeseer doesn't contain the paper
> "A Combined Corner and Edge Detector" in its database. 
> You can find the paper and the Matlab code from 
>        http://www.cs.uwa.edu.au/~pk/Research/MatlabFns/.
> 
> > Employ Lucas-Kanade optimization on the full image.
> It seems that this algorithm needs some image pyramid processing.
> The Matlab code and paper can be found from
>        http://www.ri.cmu.edu/people/baker_simon.html,
> and the C code and paper can be found from
>        http://robotics.stanford.edu/~birch/klt/.

Looks very nice. I'm currently hacking together a simple program that uses
the phase correlation mentioned below to create initialisations for the KLT
code above, which already includes a feature detector. Hopefully this will
work for simple rectilinear panoramas, without much rotation.

First experiments looks like it'll work for single row panoramas :)

>   Phase correlation can be used also to perform a coarse search,
> then klt can be used to subpixel registration. The code can be 
> found from
>       http://home.freeuk.com/lyndonhill/pc.html.
> 
ciao
  Pablo
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