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Amiga Format AFCD22 (Jan 1998, Issue 106).iso
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ppmdist.man
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ppmdist(1) AMIGA (22 July 1992) ppmdist(1)
NAME
ppmdist - simplistic grayscale assignment for machine
generated, color images
SYNOPSIS
ppmdist [-intensity|-frequency] [ppmfile]
DESCRIPTION
Reads a portable pixmap as input, performs a simplistic
grayscale assignment intended for use with grayscale or
bitmap printers.
Often conversion from ppm to pgm will yield an image with
contrast too low for good printer output. The program
maximizes contrast between the gray levels output.
A ppm input of n colors is read, and a pgm of n gray levels
is written. The gray levels take on the values 0..n-1,
while maxval takes on n-1.
The mapping from color to stepped grayscale can be performed
in order of input pixel intensity, or input pixel frequency
(number of repetitions).
OPTIONS
Helpful only for images with a very small number of colors.
Perhaps should have been an option to ppmtopgm(1).
SEE ALSO
ppmtopgm(1), ppmhist(1), ppm(5)
AUTHOR
Copyright (C) 1993 by Dan Stromberg.
Page 1 (printed 3/1/94)