[ptx] Display gamma (was:Vignetting correction in nona)

[pablo.dangelo at informatik.uni-ulm.de]

Hi Doug,

seems like my last reply was somehow messed up, and most of my reply is
missing..

> Just a quick question before I get too deep into coding:
> We use a forked version of Vigra 1.2.0. Latest version of Vigra is 1.4.0
> which apart from
> anything else is the first version to be MIT licensed. I was thinking that it
> might be a good
> idea to update to this version, forward porting the changes you've made of
> course. It might
> also make it easier to submit changes upstream. Thoughts?

Yes, this should be done.

Further steps to icc support should be:

1. take the vigra impex library and merge it into the vigra 1.4.0 library.
   The version shipped with enblend should be used here, because it already
   contains support for reading ICC profiles.

2. use this in the hugin project
3. submit patches upstream

4. implement color management functionlity in hugin/nona.

5. remove vigra from hugin cvs once the official version carries the
   needed functionality.

I'm currently busy with the vignetting correction code, so if you want to start
working on this, please feel free to do so.

ciao
  Pablo


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