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List:       gimp-user
Subject:    Re: [Gimp-user] Filter for inequality in microfilm brightness ?
From:       Doug <doug_bainbridge () onetel ! com>
Date:       2006-02-24 10:19:52
Message-ID: 43FEDDC8.700 () onetel ! com
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Stephan Hegel wrote:

> s ver wrote:
>
>> Digital photos taken from microfilm equipment in public libraries 
>> typically come up with inequality in brightness due to imperfect 
>> condenser lenses. Gives a bright center and dark corners. (sample at 
>> http://users.telenet.be/spica/trial/microfilm.jpg).
>> Has anyone a filter to correct this?
>
> The "Correct->Radial Luminance" filter of Panorama Tools could be
> helpful in your case.
>        Stephan.
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>
See also:
  http://homepage.ntlworld.com/j.houghton/vignette.htm

Doug
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