06-21-2010
Is the server completely down? Does it have power on it? Is there any messages on the monitor? If the server has power are the disk lights green or red? Do you have an emergency restore procedure?
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ppmdither(1) General Commands Manual ppmdither(1)
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.
14 July 1991 ppmdither(1)