User Commands tiff2bw(1)
NAME
tiff2bw - convert a color TIFF image to grayscale
SYNOPSIS
tiff2bw [options] input.tif output.tif
DESCRIPTION
tiff2bw converts an RGB or palette color TIFF image to a
grayscale image by combining percentages of the red, green, and blue channels. By default, output samples are created bytaking 28% of the red channel, 59% of the green channel, and
11% of the blue channel. To alter these percentages, use the
-R. -G, and -B options.
OPTIONS The following options are supported:-B Specify the percentage of the blue channel
to use. The default value is 11.-c Specify a compression scheme to use when
writing image data:-c g3 CCITT Group 3
compression algo-
rithm.-c g4 CCITT Group 4
compression algo-
rithm.-c lzw Lempel-Ziv and Welch
algorithm. This isthe default algo-
rithm.-c none No compression.
-c packbits PackBits compression
algorithm.SunOS 5.11 Last change: 26 Mar 2004 1
User Commands tiff2bw(1)
-c zip Deflate compression
algorithm.-G Specify the percentage of the green channel
to use. The default value is 59.-R Specify the percentage of the red channel to
use. The default value is 28.-r Write data with a specified number of rows
per strip. By default, the number of rows per strip is selected so that each strip is approximately 8 kilobytes. OPERANDS The following operands are supported: input.tif The name of the input TIFF file. output.tif The name of the output file.ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | image/library/libtiff ||_____________________________|_____________________________|
| Interface stability | Uncommitted ||_____________________________|_____________________________|
SEE ALSO
pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), lib-
tiff(3) NOTESSunOS 5.11 Last change: 26 Mar 2004 2
User Commands tiff2bw(1)
Updated by Breda McColgan, Sun Microsystems Inc., 2004.SunOS 5.11 Last change: 26 Mar 2004 3