[magick-users] Barrel / pincushion distortion

[Wolfgang Hugemann]

Hello again,

digging somewhat deeper, I have just fond out that there is a portation 
of PTlens to Linux called clens. The SourceForge project in which is is 
contained is called "Panorama Tools" and can be found at 
http://panotools.sourceforge.net. The source code of clens is GPL and 
can be found at http://sourceforge.net/project/showfiles.php?group_id=96188.

Looking at the code, one gets a quite precise idea how PTlens performs 
its excellent barrel / pincussion correction. The code makes the PTlens 
database available so that you can readily look up the correction 
factors for certain camera models.

Helmut Dersch's original thoughts on the subject (that seem to have laid 
the basis for PTlens) can be found at 
http://www.all-in-one.ee/~dersch/barrel/barrel.html.

It seems like quite a lot of work is already done...

Greetings from Germany
Wolfgang Hugemann