[ptx] Projections

[Peter Gawthrop]

Hi Pablo,

  wow, that was fast. 

My ideas are based on the fascinating paper: "Squaring the Circle in
Panoramas"
(http://www.vision.caltech.edu/publications/publications.html).  

That paper also discusses the Transverse Mercator projection so I
would be interested in having that in hugin as well. Equations again at
http://mathworld.wolfram.com/MercatorProjection.html.

  Peter.


From: "Pablo d'Angelo" <pablo.dangelo at web.de>
Subject: Re: [ptx] Projections (was Alternative fisheye projections)
Date: Fri, 07 Apr 2006 00:22:01 +0200

> Peter Gawthrop schrieb:
> > I'd like to play around with other projections.  The idea is to
> > stitch a rectilinear 2x1 and then project it to make it look good.
> > 
> > So far, I have modified sphere-slicer.pl by Bruno Postle to do this
> > for Mercator's projection (using formulae from
> > http://mathworld.wolfram.com/topics/MapProjections.html). The problem
> > is that it is slow. Before I plunge in to other projections, I would
> > like to be sure I am on the right path.
> > 
> > Do you thing perl is the correct approach? Or would modifying nona/hugin be
> > a better approach? I guess the main issues for me are speed and
> > interpolation quality.
> 
> Here is a patch that adds the mercator projection to libpano12.
> just use f4 in the p line use it.
> 
> I have only tried using it with PTmender (should also work with PTStitcher).
> It should also be possible to optimize mercator panos, but I haven't tested
> it yet.
> 
> Support for it from within hugin and nona will follow later.
> 
> Are there any other interesting projections that should be included in
> panotools?
> 
> ciao
>   Pablo