1<HTML> 2<HEAD> 3<TITLE> 4Acknowledgments and Other Issues 5</TITLE> 6</HEAD> 7<BODY BGCOLOR=white> 8<FONT FACE="Arial, Helvetica, Sans"> 9<H1> 10<IMG SRC=images/ring.gif WIDTH=124 HEIGHT=124 ALIGN=left BORDER=1 HSPACE=6> 11Acknowledgments and Other Issues 12</H1> 13 14<P> 15Silicon Graphics has seen fit to allow me to give this work away. It 16is free. There is no support or guarantee of any sort as to its 17operations, correctness, or whatever. If you do anything useful with 18all or parts of it you need to honor the copyright notices. I would 19also be interested in knowing about it and, hopefully, be acknowledged. 20 21<BR CLEAR=left> 22 23 24<H2>Acknowledgements</H2> 25 26The LZW algorithm is derived from the compress program (the proper 27attribution is included in the source code). The Group 3 fax stuff 28originated as code from Jef Poskanzer, but has since been rewritten 29several times. The latest version uses an algorithm from Frank 30Cringle -- consult <TT>libtiff/mkg3states.c</TT> and 31<TT>libtiff/tif_fax3.h</TT> for further information. 32The JPEG support was written by Tom Lane and is dependent on the 33excellent work of Tom Lane and the Independent JPEG Group (IJG) 34who distribute their work under friendly licensing similar to this 35software. 36Many other people have by now helped with bug fixes and code; a 37few of the more persistent contributors have been: 38 39<PRE> 40 Bjorn P. Brox Dan McCoy 41 J.T. Conklin Richard Minner 42 Frank D. Cringle Richard Mlynarik 43 Soren Pingel Dalsgaard Niles Ritter 44 Steve Johnson Karsten Spang 45 Tom Lane Peter Smith 46 Brent Roman Mike Welles 47 Frank Warmerdam Greg Ward 48 Stanislav Brabec Roman Shpount 49 Peter Skarpetis Arvan Pritchard 50 Bernt Herd Joseph Orost 51 Phil Beffery Ivo Penzar 52 Francois Dagand Albert Chin-A-Young 53</PRE> 54 55(my apology to anyone that was inadvertently not listed.) 56 57<H2>Warning</H2> 58 59It appears that Unisys is actively pursuing copyright control on the 60LZW compression algorithm. In particular, users of the LZW compression 61within the TIFF framework. For this reason the TIFF 6.0 spec states 62that LZW compression is not recommended. It is unclear at this time 63what compression algorithm will be used in place of it. I have no idea 64what this means to you or to this library. I make no warranty or 65guarantees with regard to the LZW support in this library. 66 67 68<H2>Use and Copyright</H2> 69 70<P><H5><PRE> 71Copyright (c) 1988-1997 Sam Leffler 72Copyright (c) 1991-1997 Silicon Graphics, Inc. 73 74Permission to use, copy, modify, distribute, and sell this software and 75its documentation for any purpose is hereby granted without fee, provided 76that (i) the above copyright notices and this permission notice appear in 77all copies of the software and related documentation, and (ii) the names of 78Sam Leffler and Silicon Graphics may not be used in any advertising or 79publicity relating to the software without the specific, prior written 80permission of Sam Leffler and Silicon Graphics. 81 82THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 83EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 84WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 85 86IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 87ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 88OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 89WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 90LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 91OF THIS SOFTWARE. 92</PRE></H5> 93 94<P> 95<HR> 96 97 98Last updated: $Date: 2001-02-19 15:31:17 $ 99</BODY> 100</HTML> 101
