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-.\" $Id: tiff2bw.1,v 1.3 2006/04/20 12:17:19 dron Exp $
-.\"
-.\" 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.
-.\"
-.if n .po 0
-.TH TIFF2BW 1 "November 2, 2005" "libtiff"
-.SH NAME
-tiff2bw \- convert a color
-.SM TIFF
-image to greyscale
-.SH SYNOPSIS
-.B tiff2bw
-[
-.I options
-]
-.I input.tif
-.I output.tif
-.SH DESCRIPTION
-.I Tiff2bw
-converts an
-.SM RGB
-or Palette color
-.SM TIFF
-image to a greyscale image by
-combining percentages of the red, green, and blue channels.
-By default, output samples are created by taking
-28% of the red channel, 59% of the green channel, and 11% of
-the blue channel.
-To alter these percentages, the
-.BR \-R ,
-.BR \-G ,
-and
-.BR \-B
-options may be used.
-.SH OPTIONS
-.TP
-.B \-c
-Specify a compression scheme to use when writing image data:
-.B "\-c none"
-for no compression,
-.B "\-c packbits"
-for the PackBits compression algorithm,
-.B "\-c zip
-for the Deflate compression algorithm,
-.B "\-c g3
-for the CCITT Group 3 compression algorithm,
-.B "\-c g4
-for the CCITT Group 4 compression algorithm,
-and
-.B "\-c lzw"
-for Lempel-Ziv & Welch (the default).
-.TP
-.B \-r
-Write data with a specified number of rows per strip;
-by default the number of rows/strip is selected so that each strip
-is approximately 8 kilobytes.
-.TP
-.B \-R
-Specify the percentage of the red channel to use (default 28).
-.TP
-.B \-G
-Specify the percentage of the green channel to use (default 59).
-.TP
-.B \-B
-Specify the percentage of the blue channel to use (default 11).
-.SH "SEE ALSO"
-.BR pal2rgb (1),
-.BR tiffinfo (1),
-.BR tiffcp (1),
-.BR tiffmedian (1),
-.BR libtiff (3)
-.PP
-Libtiff library home page:
-.BR http://www.remotesensing.org/libtiff/