ppmdither
Section: User Commands (1)
Updated: 14 July 1991
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NAME
ppmdither  ordered dither for color images
SYNOPSIS
ppmdither
[dim
power]
[red
shades]
[green
shades]
[blue
shades]
[ppmfile]
DESCRIPTION
Reads a portable pixmap as input, and applies dithering to it to reduce
the number of colors used down to the specified number of shades for
each primary.
The default number of shades is red=5, green=9, blue=5, for
a total of 225 colors.
To convert the image to a binary rgb format
suitable for color printers, use red 2 green 2 blue 2.
OPTIONS
 dim power

The size of the dithering matrix. The dithering matrix is a square whose
dimension is a power of 2.
power
is that power of 2. The default is 4, for a 16 by 16 matrix.
 red shades

The number of red shades to be used, including black; minimum of 2.
 green shades

The number of green shades to be used, including black; minimum of 2.
 blue shades

The number of blue shades to be used, including black; minimum of 2.
SEE ALSO
pnmdepth(1), ppmquant(1), ppm(5)
AUTHOR
Copyright (C) 1991 by Christos Zoulas.
Index
 NAME

 SYNOPSIS

 DESCRIPTION

 OPTIONS

 SEE ALSO

 AUTHOR

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