1999-07-27 17:50:26 -04:00
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<TITLE>
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Acknowledgments and Other Issues
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</HEAD>
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<H1>
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<IMG SRC=images/ring.gif WIDTH=124 HEIGHT=124 ALIGN=left BORDER=1 HSPACE=6>
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Acknowledgments and Other Issues
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</H1>
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<P>
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Silicon Graphics has seen fit to allow me to give this work away. It
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is free. There is no support or guarantee of any sort as to its
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operations, correctness, or whatever. If you do anything useful with
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all or parts of it you need to honor the copyright notices. I would
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also be interested in knowing about it and, hopefully, be acknowledged.
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<BR CLEAR=left>
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<H2>Acknowledgements</H2>
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The LZW algorithm is derived from the compress program (the proper
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attribution is included in the source code). The Group 3 fax stuff
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originated as code from Jef Poskanzer, but has since been rewritten
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several times. The latest version uses an algorithm from Frank
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Cringle -- consult <TT>libtiff/mkg3states.c</TT> and
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<TT>libtiff/tif_fax3.h</TT> for further information.
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The JPEG support was written by Tom Lane and is dependent on the
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excellent work of Tom Lane and the Independent JPEG Group (IJG)
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who distribute their work under friendly licensing similar to this
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software.
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Many other people have by now helped with bug fixes and code; a
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few of the more persistent contributors have been:
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<PRE>
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Bjorn P. Brox Dan McCoy
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J.T. Conklin Richard Minner
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Frank D. Cringle Richard Mlynarik
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Soren Pingel Dalsgaard Niles Ritter
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Steve Johnson Karsten Spang
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Tom Lane
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</PRE>
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(my apology to anyone that was inadvertently not listed.)
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<H2>Warning</H2>
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It appears that Unisys is actively pursuing copyright control on the
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LZW compression algorithm. In particular, users of the LZW compression
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within the TIFF framework. For this reason the TIFF 6.0 spec states
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that LZW compression is not recommended. It is unclear at this time
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what compression algorithm will be used in place of it. I have no idea
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what this means to you or to this library. I make no warranty or
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guarantees with regard to the LZW support in this library.
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<H2>Use and Copyright</H2>
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<P><H5><PRE>
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Copyright (c) 1988-1997 Sam Leffler
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Copyright (c) 1991-1997 Silicon Graphics, Inc.
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Permission to use, copy, modify, distribute, and sell this software and
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its documentation for any purpose is hereby granted without fee, provided
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that (i) the above copyright notices and this permission notice appear in
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all copies of the software and related documentation, and (ii) the names of
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Sam Leffler and Silicon Graphics may not be used in any advertising or
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publicity relating to the software without the specific, prior written
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permission of Sam Leffler and Silicon Graphics.
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THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
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EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
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WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
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IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
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ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
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LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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OF THIS SOFTWARE.
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</PRE></H5>
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<P>
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<HR>
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<ADDRESS>
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<A HREF="sam.html">Sam Leffler</A> / <A HREF="mailto:sam@engr.sgi.com">sam@engr.sgi.com</A>.
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1999-08-09 16:14:19 -04:00
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Last updated: $Date: 1999-08-09 20:14:19 $
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1999-07-27 17:50:26 -04:00
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</ADDRESS>
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</BODY>
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1999-08-09 16:14:19 -04:00
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1999-07-27 17:50:26 -04:00
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