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ppmdither
!!!ppmdither
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
SEE ALSO
AUTHOR
----
!!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.
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Last edited on Monday, June 3, 2002 6:50:59 pm by "perry"

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