src/tiff/man/tiff2bw.1

.\"
.\" 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/
Commit	Line	Data
	1	.\"
	2	.\" Copyright (c) 1988-1997 Sam Leffler
	3	.\" Copyright (c) 1991-1997 Silicon Graphics, Inc.
	4	.\"
	5	.\" Permission to use, copy, modify, distribute, and sell this software and
	6	.\" its documentation for any purpose is hereby granted without fee, provided
	7	.\" that (i) the above copyright notices and this permission notice appear in
	8	.\" all copies of the software and related documentation, and (ii) the names of
	9	.\" Sam Leffler and Silicon Graphics may not be used in any advertising or
	10	.\" publicity relating to the software without the specific, prior written
	11	.\" permission of Sam Leffler and Silicon Graphics.
	12	.\"
	13	.\" THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
	14	.\" EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
	15	.\" WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
	16	.\"
	17	.\" IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
	18	.\" ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
	19	.\" OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
	20	.\" WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
	21	.\" LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
	22	.\" OF THIS SOFTWARE.
	23	.\"
	24	.if n .po 0
	25	.TH TIFF2BW 1 "November 2, 2005" "libtiff"
	26	.SH NAME
	27	tiff2bw \- convert a color
	28	.SM TIFF
	29	image to greyscale
	30	.SH SYNOPSIS
	31	.B tiff2bw
	32	[
	33	.I options
	34	]
	35	.I input.tif
	36	.I output.tif
	37	.SH DESCRIPTION
	38	.I Tiff2bw
	39	converts an
	40	.SM RGB
	41	or Palette color
	42	.SM TIFF
	43	image to a greyscale image by
	44	combining percentages of the red, green, and blue channels.
	45	By default, output samples are created by taking
	46	28% of the red channel, 59% of the green channel, and 11% of
	47	the blue channel.
	48	To alter these percentages, the
	49	.BR \-R ,
	50	.BR \-G ,
	51	and
	52	.BR \-B
	53	options may be used.
	54	.SH OPTIONS
	55	.TP
	56	.B \-c
	57	Specify a compression scheme to use when writing image data:
	58	.B "\-c none"
	59	for no compression,
	60	.B "\-c packbits"
	61	for the PackBits compression algorithm,
	62	.B "\-c zip
	63	for the Deflate compression algorithm,
	64	.B "\-c g3
	65	for the CCITT Group 3 compression algorithm,
	66	.B "\-c g4
	67	for the CCITT Group 4 compression algorithm,
	68	and
	69	.B "\-c lzw"
	70	for Lempel-Ziv & Welch (the default).
	71	.TP
	72	.B \-r
	73	Write data with a specified number of rows per strip;
	74	by default the number of rows/strip is selected so that each strip
	75	is approximately 8 kilobytes.
	76	.TP
	77	.B \-R
	78	Specify the percentage of the red channel to use (default 28).
	79	.TP
	80	.B \-G
	81	Specify the percentage of the green channel to use (default 59).
	82	.TP
	83	.B \-B
	84	Specify the percentage of the blue channel to use (default 11).
	85	.SH "SEE ALSO"
	86	.BR pal2rgb (1),
	87	.BR tiffinfo (1),
	88	.BR tiffcp (1),
	89	.BR tiffmedian (1),
	90	.BR libtiff (3)
	91	.PP
	92	Libtiff library home page:
	93	.BR http://www.remotesensing.org/libtiff/