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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/