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- .\"
- .\" 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.simplesystems.org/libtiff/
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