ppmhist man page on Debian

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ppmhist(1)							    ppmhist(1)

NAME
       ppmhist - print a histogram of a portable pixmap

SYNOPSIS
       ppmhist [-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 rep‐
	      resented	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(5), pgmhist(1), ppmtomap(1), pnmhistmap(1), ppmchange(1)

AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.

			       17 September 2000		    ppmhist(1)
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