ppmhist
print a histogram of a portable pixmap
see also :
pgmhist - ppmtomap - pnmhistmap - ppmchange
Synopsis
ppmhist
[-hexcolor] [-noheader] [-map]
[-nomap] [-sort={frequency,rgb}]
[ppmfile]
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description
Reads a PPM
image as input. Generates a histogram of the colors in the
image, i.e. a list of all the colors and how many pixels of
each color are in the image.
options
-sort={frequency,rgb}
The -sort option
determines the order in which the colors are listed in the
output. frequency means to list them in order of how
pixels in the input image have the color, with the most
represented colors first. rgb means to sort them
first by the intensity of the red component of the color,
the of the green, then of the blue, with the least intense
first.
The default is
frequency.
-hexcolor
Print the color components in
hexadecimal. Default is decimal.
-noheader
Do not print the column
headings.
-map
Generates a PPM file of the colormap for the image, with
the color histogram as comments.
-nomap
Generates the histogram for human reading. This is the
default.
see also
ppm,
pgmhist , ppmtomap , pnmhistmap ,
ppmchange
author
Copyright (C)
1989 by Jef Poskanzer.