[PanoTools-devel] bug in shear parameter handling: READ IT if you use them!

[D M G. <dm...@uv...>]

Hi Everybody,

There was a bug in panotools. It involves the parameters g and t (it has
survived since their conception).

In a nutshell, they have never worked properly. More specifically, its
inverse was wrongly computed when both g and t were different from zero
(I can elaborate on why, if there is interest).

I have a patch now, that I'll commit in the following hours.

This patch might disrupt some people's panoramas iff they use a script
with both g and t <> 0. I think almost nobody does, because the
parameters were useless. I suspect this is the reason they were never
included in the hugin interface (besides the fact that they are of
little practical use).

Dev is finishing the code to add a new feature to the evaluation stack,
called 'tilt'. This will be similar to shear, but will allow an effect
similar to "shear" with independent parameters in each side of the image
(think in terms of holding a photo  and "tilting" it in any angle).

Once his tilt code is finalized, the next step is to add code to the
optimizer, in order for the new parameters of the tilt function to work.

--dmg


-- 
--
Daniel M. German                  
http://turingmachine.org/
http://silvernegative.com/
dmg (at) uvic (dot) ca
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