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Pgmnoise User Manual(0)				       Pgmnoise User Manual(0)

NAME
       pgmnoise - create a PGM image made up of white noise

SYNOPSIS
       pgmnoise width height

       [-randomseed=integer]

       Minimum	unique	abbreviations  of  option are acceptable.  You may use
       double hyphens instead of single hyphen to denote options.  You may use
       white space in place of the equals sign to separate an option name from
       its value.

DESCRIPTION
       This program is part of Netpbm(1).

       pgmnoise creates a PGM image that  is  made  up	of  pixels  of	random
       brightness.  The maxval is 255.

       You specify the dimensions of the image with the width and height argu‐
       ments.

       The randomness in the image is limited before  Netpbm  10.37  (December
       2006)  --  if you run the program twice in the same second, you may get
       identical output.

OPTIONS
       -randomseed=integer
	      This is the seed for the random number generator that  generates
	      the pixels.

	      Use  this	 to  ensure you get the same image on separate invoca‐
	      tions.

	      By default, pgmnoise uses a seed derived from the	 time  of  day
	      and  process  ID, which gives you fairly uncorrelated results in
	      multiple invocations.

	      This option was new in Netpbm 10.45 (December 2008).

SEE ALSO
       pgm(1)

AUTHOR
       Copyright (C) 1993 by Frank Neumann

netpbm documentation	       23 November 2008	       Pgmnoise User Manual(0)

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