tiff2bw - convert a color TIFF image to greyscale
tiff2bw [ options ] input.tif output.tif
TIFF2BW(1) General Commands Manual TIFF2BW(1)
NAME
tiff2bw - convert a color TIFF image to greyscale
SYNOPSIS
tiff2bw [ options ] input.tif output.tif
DESCRIPTION
Tiff2bw converts an RGB or Palette color 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 chan-
nel, 59% of the green channel, and 11% of the blue channel. To alter
these percentages, the -R, -G, and -B options may be used.
OPTIONS
-c Specify a compression scheme to use when writing image data: -c
none for no compression, -c packbits for the PackBits compres-
sion algorithm, -c zip for the Deflate compression algorithm, -c
g3 for the CCITT Group 3 compression algorithm, -c g4 for the
CCITT Group 4 compression algorithm, and -c lzw for Lempel-Ziv &
Welch (the default).
-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.
-R Specify the percentage of the red channel to use (default 28).
-G Specify the percentage of the green channel to use (default 59).
-B Specify the percentage of the blue channel to use (default 11).
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | image/library/libtiff |
+---------------+-----------------------+
|Stability | Volatile |
+---------------+-----------------------+
SEE ALSO
pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)
Libtiff library home page: http://www.simplesystems.org/libtiff/
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from http://down-
load.osgeo.org/libtiff/tiff-4.2.0.tar.gz.
Further information about this software can be found on the open source
community website at http://www.simplesystems.org/libtiff/.
libtiff November 2, 2005 TIFF2BW(1)