tiff2bw(1) 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 by taking 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 algorithm.
-c g4 CCITT Group 4 compression algorithm.
-c lzw Lempel-Ziv and Welch algorithm. This is the default algorithm.
-c none No compression.
-c packbits PackBits compression algorithm.
-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 attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWTiff |
+-----------------------------+-----------------------------+
|Interface stability |Uncommitted |
+-----------------------------+-----------------------------+
SEE ALSO
pal2rgb(1), tiffinfo(1), tiffcp(1), tiffmedian(1), libtiff(3)
NOTES
Updated by Breda McColgan, Sun Microsystems Inc., 2004.
SunOS 5.11 26 Mar 2004 tiff2bw(1)