Hi,

I'm trying to do a series of operations on a bunch of scanned images.  At
first I was doing this on a Linux box, but these images are quite large, and
this box is quite old.  So I figured I'd try this on my windows laptop to
speed things along.

The operation that is giving me issues is: 

        convert 23.png -level 75%,100%,0.5 23-level.png

Presumably this should give the same output no matter where it is run, but
it isn't.  I've uploaded a section of the original image, and the results of
the conversion:

http://www.redtetrahedron.org/23-section-test-original.png
http://www.redtetrahedron.org/23-section-test-windows.png 
http://www.redtetrahedron.org/23-section-test-linux.png

Any ideas what the problem is? As far as I know the Linux results are
correct.  

Thanks for your help.

Eric

Relevant info: 

Ubuntu 7.10:
[EMAIL PROTECTED]:~\> convert -version
Version: ImageMagick 6.2.4 10/02/07 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2005 ImageMagick Studio LLC 

Window XP sp2:
C:\>convert -version
Version: ImageMagick 6.3.7 01/11/08 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2008 ImageMagick Studio LLC


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