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Date: Sat, 14 Jul 2007 10:39:10 -0700
From: Lee Howard <faxguy@howardsilvan.com>
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To: Andy Cave <andy.cave@hamillroad.com>
Subject: Re: [Tiff] [ANNOUNCE]: Libtiff 3.9.0beta released
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Status: RO

Andy Cave wrote:

> People should be aware that the JBIG implementation does NOT allow for 
> commercial use of LibTIFF, since it is based on JPEG-KIT. Anyone 
> shipping commercial products based on this release will either have to 
> remove it, or obtain a license.


The library is called JBIG-KIT, and yes it is GPL.  However, as Bob 
pointed out, that doesn't necessarily preclude commercial use.

JBIG support is compiled-in only if the JBIG-KIT library is found during 
configure *and* if "--disable-jbig" is not used.  If you're building 
libtiff and you don't want JBIG support compiled-in then you can either 
ensure that you don't have JBIG-KIT installed (some Linux distros do 
have it) or simply ensure that you always use "--disable-jbig".  There 
is no need to *remove* code from libtiff.

That said, JBIG is patent-encumbered, and so if you use JBIG support you 
may wish to obtain proper licensing.  Markus Kuhn (the JBIG-KIT) author, 
discusses the patent issues at length on his website:

  http://www.cl.cam.ac.uk/~mgk25/jbigkit/patents.html

Thanks,

Lee.
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