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 41 Dan McCoy 42 J.T. Conklin 43 Richard Minner 44 Frank D. Cringle 45 Richard Mlynarik 46 Soren Pingel Dalsgaard 47 Niles Ritter 48 Steve Johnson 49 Karsten Spang 50 Tom Lane 51 Peter Smith 52 Brent Roman 53 Mike Welles 54 Frank Warmerdam 55 Greg Ward 56 Stanislav Brabec 57 Roman Shpount 58 Peter Skarpetis 59 Arvan Pritchard 60 Bernt Herd 61 Joseph Orost 62 Phil Beffery 63 Ivo Penzar 64 Francois Dagand 65 Albert Chin-A-Young 66 Bruce A. Mallett 67</PRE> 68 69(my apology to anyone that was inadvertently not listed.) 70 71<H2>Warning</H2> 72 73It appears that Unisys is actively pursuing copyright control on the 74LZW compression algorithm. In particular, users of the LZW compression 75within the TIFF framework. For this reason the TIFF 6.0 spec states 76that LZW compression is not recommended. It is unclear at this time 77what compression algorithm will be used in place of it. I have no idea 78what this means to you or to this library. I make no warranty or 79guarantees with regard to the LZW support in this library. 80 81 82<H2>Use and Copyright</H2> 83 84<P><H5><PRE> 85Copyright (c) 1988-1997 Sam Leffler 86Copyright (c) 1991-1997 Silicon Graphics, Inc. 87 88Permission to use, copy, modify, distribute, and sell this software and 89its documentation for any purpose is hereby granted without fee, provided 90that (i) the above copyright notices and this permission notice appear in 91all copies of the software and related documentation, and (ii) the names of 92Sam Leffler and Silicon Graphics may not be used in any advertising or 93publicity relating to the software without the specific, prior written 94permission of Sam Leffler and Silicon Graphics. 95 96THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 97EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 98WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 99 100IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR 101ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, 102OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 103WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 104LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 105OF THIS SOFTWARE. 106</PRE></H5> 107 108<P> 109<HR> 110 111 112Last updated: $Date: 2001-03-29 01:38:54 $ 113</BODY> 114</HTML> 115
