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consequences; the authors accept NO 
LIABILITY for damages of any kind.
These conditions apply to any software 
derived from or based on the IJG code, not just 
to the unmodified library. If you use our work, 
you ought to acknowledge us.
Permission is NOT granted for the use of any 
IJG author's name or company name in 
advertising or publicity relating to this 
software or products derived from it. This 
software may be referred to only as "the 
Independent JPEG Group's software".
We specifically permit and encourage the use 
of this software as the basis of commercial 
products, provided that all warranty or liability 
claims are assumed by the product vendor.
ansi2knr.c is included in this distribution by 
permission of L. Peter Deutsch, sole proprietor 
of its copyright holder, Aladdin Enterprises of 
Menlo Park, CA. ansi2knr.c is NOT covered 
by the above copyright and conditions, but 
instead by the usual distribution terms of the 
Free Software Foundation; principally, that 
you must include source code if you 
redistribute it. (See the file ansi2knr.c for full 
details.) However, since ansi2knr.c is not 
needed as part of any program generated from 
the IJG code, this does not limit you more than 
the foregoing paragraphs do.
The Unix configuration script "configure" was 
produced with GNU Autoconf. It is copyright 
by the Free Software Foundation but is freely 
distributable. The same holds for its 
supporting scripts (config.guess, config.sub, 
ltconfig, ltmain.sh). Another support script, 
install-sh, is copyright by M.I.T. but is also 
freely distributable.
It appears that the arithmetic coding option of 
the JPEG spec is covered by patents owned by 
IBM, AT&T, and Mitsubishi. Hence arithmetic 
coding cannot legally be used without 
obtaining one or more licenses. For this 
reason, support for arithmetic coding has been 
removed from the free JPEG software. (Since 
arithmetic coding provides only a marginal 
gain over the unpatented Huffman mode, it is 
unlikely that very many implementations will 
support it.) So far as we are aware, there are no 
patent restrictions on the remaining code.
The IJG distribution formerly included code to 
read and write GIF files. To avoid 
entanglement with the Unisys LZW patent, 
GIF reading support has been removed 
altogether, and the GIF writer has been 
simplified to produce uncompressed GIFs. 
This technique does not use the LZW 
algorithm; the resulting GIF files are larger 
than usual, but are readable by all standard GIF 
decoders.
We are required to state that
"The Graphics Interchange Format(c) is 
the Copyright property of CompuServe 
Incorporated. GIF(sm) is a Service Mark 
property of CompuServe Incorporated."
LIBPNG
libpng versions 1.2.6, August 15, 2004, 
through 1.2.37, June 4, 2009, are Copyright (c) 
2004, 2006-2009 Glenn Randers-Pehrson, and 
are distributed according to the same 
disclaimer and license as libpng-1.2.5 with the 
following individual added to the list of 
Contributing Authors: Cosmin Truta.
libpng versions 1.0.7, July 1, 2000, through 
1.2.5 - October 3, 2002, are Copyright (c) 
2000-2002 Glenn Randers-Pehrson, and are 
distributed according to the same disclaimer 
and license as libpng-1.0.6 with the following 
individuals added to the list of Contributing 
Authors: Simon-Pierre Cadieux, Eric S. 
Raymond, and Gilles Vollant, and with the 
following additions to the disclaimer: There is 
no warranty against interference with your 
enjoyment of the library or against 
infringement. There is no warranty that our 
efforts or the library will fulfill any of your 
particular purposes or needs. This library is 
provided with all faults, and the entire risk of 
satisfactory quality, performance, accuracy, 
and effort is with the user.
libpng versions 0.97, January 1998, through 
1.0.6, March 20, 2000, are Copyright (c) 1998, 
1999 Glenn Randers-Pehrson, and are 
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