Blame man/tiff2bw.1

Packit 7838c8
.\"	$Id: tiff2bw.1,v 1.4 2016-09-25 20:05:51 bfriesen Exp $
Packit 7838c8
.\"
Packit 7838c8
.\" Copyright (c) 1988-1997 Sam Leffler
Packit 7838c8
.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
Packit 7838c8
.\"
Packit 7838c8
.\" Permission to use, copy, modify, distribute, and sell this software and 
Packit 7838c8
.\" its documentation for any purpose is hereby granted without fee, provided
Packit 7838c8
.\" that (i) the above copyright notices and this permission notice appear in
Packit 7838c8
.\" all copies of the software and related documentation, and (ii) the names of
Packit 7838c8
.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
Packit 7838c8
.\" publicity relating to the software without the specific, prior written
Packit 7838c8
.\" permission of Sam Leffler and Silicon Graphics.
Packit 7838c8
.\" 
Packit 7838c8
.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
Packit 7838c8
.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
Packit 7838c8
.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
Packit 7838c8
.\" 
Packit 7838c8
.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
Packit 7838c8
.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
Packit 7838c8
.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
Packit 7838c8
.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
Packit 7838c8
.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
Packit 7838c8
.\" OF THIS SOFTWARE.
Packit 7838c8
.\"
Packit 7838c8
.if n .po 0
Packit 7838c8
.TH TIFF2BW 1 "November 2, 2005" "libtiff"
Packit 7838c8
.SH NAME
Packit 7838c8
tiff2bw \- convert a color
Packit 7838c8
.SM TIFF
Packit 7838c8
image to greyscale
Packit 7838c8
.SH SYNOPSIS
Packit 7838c8
.B tiff2bw
Packit 7838c8
[
Packit 7838c8
.I options
Packit 7838c8
]
Packit 7838c8
.I input.tif
Packit 7838c8
.I output.tif
Packit 7838c8
.SH DESCRIPTION
Packit 7838c8
.I Tiff2bw
Packit 7838c8
converts an
Packit 7838c8
.SM RGB
Packit 7838c8
or Palette color
Packit 7838c8
.SM TIFF
Packit 7838c8
image to a greyscale image by
Packit 7838c8
combining percentages of the red, green, and blue channels.
Packit 7838c8
By default, output samples are created by taking
Packit 7838c8
28% of the red channel, 59% of the green channel, and 11% of
Packit 7838c8
the blue channel.
Packit 7838c8
To alter these percentages, the
Packit 7838c8
.BR \-R ,
Packit 7838c8
.BR \-G ,
Packit 7838c8
and
Packit 7838c8
.BR \-B
Packit 7838c8
options may be used.
Packit 7838c8
.SH OPTIONS
Packit 7838c8
.TP
Packit 7838c8
.B \-c
Packit 7838c8
Specify a compression scheme to use when writing image data:
Packit 7838c8
.B "\-c none"
Packit 7838c8
for no compression,
Packit 7838c8
.B "\-c packbits"
Packit 7838c8
for the PackBits compression algorithm,
Packit 7838c8
.B "\-c zip
Packit 7838c8
for the Deflate compression algorithm,
Packit 7838c8
.B "\-c g3
Packit 7838c8
for the CCITT Group 3 compression algorithm,
Packit 7838c8
.B "\-c g4
Packit 7838c8
for the CCITT Group 4 compression algorithm,
Packit 7838c8
and
Packit 7838c8
.B "\-c lzw"
Packit 7838c8
for Lempel-Ziv & Welch (the default).
Packit 7838c8
.TP
Packit 7838c8
.B \-r
Packit 7838c8
Write data with a specified number of rows per strip;
Packit 7838c8
by default the number of rows/strip is selected so that each strip
Packit 7838c8
is approximately 8 kilobytes.
Packit 7838c8
.TP
Packit 7838c8
.B \-R
Packit 7838c8
Specify the percentage of the red channel to use (default 28).
Packit 7838c8
.TP
Packit 7838c8
.B \-G
Packit 7838c8
Specify the percentage of the green channel to use (default 59).
Packit 7838c8
.TP
Packit 7838c8
.B \-B
Packit 7838c8
Specify the percentage of the blue channel to use (default 11).
Packit 7838c8
.SH "SEE ALSO"
Packit 7838c8
.BR pal2rgb (1),
Packit 7838c8
.BR tiffinfo (1),
Packit 7838c8
.BR tiffcp (1),
Packit 7838c8
.BR tiffmedian (1),
Packit 7838c8
.BR libtiff (3)
Packit 7838c8
.PP
Packit 7838c8
Libtiff library home page:
Packit 7838c8
.BR http://www.simplesystems.org/libtiff/