On Sun 03-Jan-2010 at 05:02 -0800, Wolfgang Hugemann wrote:
>
>The bachground of the question is that the barrel distortion
>correction has been implemented in ImageMagick (www.imageMagick.org)
>some time ago (partly due to my request) and the IM community now
>needs an easy way to determine lens parameters in order to make this
>functionality useful.

The tutorial method is only really stable with lots of lines in the 
scene (or multiple photos).

The same system was developed into a command-line tool in this 
year's summer of code - calibrate_lens is part of the Hugin 2009.4.0 
release: http://hugin.sourceforge.net/releases/2009.4.0/

This tool does exactly what you want, but needs some documentation 
to be usable.

-- 
Bruno

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