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Acknowledgments and Other Issues
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Acknowledgments and Other Issues
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Silicon Graphics has seen fit to allow us to give this work away.  It
is free.  There is no support or guarantee of any sort as to its
operations, correctness, or whatever.  If you do anything useful with
all or parts of it you need to honor the copyright notices.  It would
also be nice to be acknowledged.<p>

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<H2>Acknowledgements</H2>

The libtiff software was written by Sam Leffler while working for
Silicon Graphics.<p>

The LZW algorithm is derived from the compress program (the proper attribution
is included in the source code).  The Group 3 fax stuff originated as code
from Jef Poskanzer, but has since been rewritten several times.  The latest
version uses an algorithm from Frank Cringle -- consult
<TT>libtiff/mkg3states.c</TT> and <TT>libtiff/tif_fax3.h</TT> for further
information. The JPEG support was written by Tom Lane and is dependent on the
excellent work of Tom Lane and the Independent JPEG Group (IJG) who distribute
their work under friendly licensing similar to this software. Joris Van Damme
implemented the robust Old JPEG decoder (as included in libtiff since version
3.9.0, there was another Old JPEG module in older releases, which was
incomplete and unsuitable for many existing images of that format). JBIG
module was written by Lee Howard and depends on JBIG library from the Markus
Kuhn. Many other people have by now helped with bug fixes and code; a few of
the more persistent contributors have been:

<PRE>
    Bjorn P. Brox
    Dan McCoy
    J.T. Conklin                
    Richard Minner
    Frank D. Cringle        
    Richard Mlynarik
    Soren Pingel Dalsgaard  
    Niles Ritter
    Steve Johnson           
    Karsten Spang
    Tom Lane               
    Peter Smith
    Brent Roman            
    Mike Welles
    Frank Warmerdam
    Greg Ward
    Stanislav Brabec        
    Roman Shpount
    Peter Skarpetis        
    Arvan Pritchard
    Bernt Herd             
    Joseph Orost
    Phil Beffery           
    Ivo Penzar
    Francois Dagand        
    Albert Chin-A-Young
    Bruce A. Mallett
    Dwight Kelly
    Andrey Kiselev
    Ross Finlayson
    Dmitry V. Levin
    Bob Friesenhahn
    Lee Howard
    Joris Van Damme
    Tavis Ormandy
    Richard Nolde
</PRE>

(my apology to anyone that was inadvertently not listed.)

<H2>Use and Copyright</H2>

<P><H5><PRE>
Copyright (c) 1988-1997 Sam Leffler
Copyright (c) 1991-1997 Silicon Graphics, Inc.

Permission to use, copy, modify, distribute, and sell this software and 
its documentation for any purpose is hereby granted without fee, provided
that (i) the above copyright notices and this permission notice appear in
all copies of the software and related documentation, and (ii) the names of
Sam Leffler and Silicon Graphics may not be used in any advertising or
publicity relating to the software without the specific, prior written
permission of Sam Leffler and Silicon Graphics.

THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  

IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
OF THIS SOFTWARE.
</PRE></H5>

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Last updated: $Date: 2007/02/24 15:47:04 $
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