Ppmdither User Manual(0) Ppmdither User Manual(0)
ppmdither - ordered dither for color images
This program is part of Netpbm(1).
ppmdither reads a PPM image 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.
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.
The number of red shades to be used, including black; minimum of
The number of green shades to be used, including black; minimum
The number of blue shades to be used, including black; minimum
pnmdepth(1), pnmquant(1), ppm(1)
Copyright (C) 1991 by Christos Zoulas.
netpbm documentation 14 July 1991 Ppmdither User Manual(0)
Man(1) output converted with