[ptx] SIFT code

[alexandre jenny]

> It also looks like it implements some steps after SIFT 
> itself, having RANSAC and motion correlation code in it. I 
> just skimmed the code though. Theoretically, because it is 
> combined with GPL'd code the whole stuff is GPL'ed, too.
> 
> Will make a great test to verify the correctness of my stuff. 
> Though I do not have Matlab.

I do ...
Will have a look at this code. What I already saw is that the
Orientation calculus is a bit different from the standard one.

Bye,
   Alexandre