tiff2bw(1) User Commands tiff2bw(1)NAMEtiff2bw - convert a color TIFF image to grayscale
SYNOPSIStiff2bw [options] input.tif output.tif
DESCRIPTIONtiff2bw 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 algo‐
rithm.
-c g4 CCITT Group 4 compression algo‐
rithm.
-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 │image/library/libtiff │
├─────────────────────────────┼─────────────────────────────┤
│Interface stability │Uncommitted │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOpal2rgb(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)