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TIFF2BW

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

SEE ALSO

NAME

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tiff2bw − convert a color <small>TIFF</small> image

to greyscale

SYNOPSIS

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tiff2bw [ options ] input.tif

output.tif

DESCRIPTION

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Tiff2bw converts an <small>RGB</small> or Palette

color <small>TIFF</small> 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 −R,

−G, and −B options may be

used.

OPTIONS

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−c

Specify a compression scheme to use when writing image

data: −c none for no compression, −c

packbits for the PackBits compression 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).

SEE ALSO

       cols="2" cellspacing="0" cellpadding="0">

pal2rgb(1), tiffinfo(1), tiffcp(1),

tiffmedian(1), libtiff(3)

Libtiff library home page:

http://www.remotesensing.org/libtiff/