ppmhist(1)ppmhist(1)NAMEppmhist - print a histogram of a PPM image
SYNOPSISppmhist [-hexcolor] [-noheader] [-map] [-nomap]
[-sort={frequency,rgb}] [ppmfile]
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 ALSOppm(5), pgmhist(1), ppmtomap(1), pnmhistmap(1), ppm
change(1)AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
17 September 2000 ppmhist(1)
