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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 arguments.

       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 invocations.

              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)