NAME

       pgmnoise - create a PGM image made up of white noise

SYNOPSIS

       pgmnoise width height

       [-maxval=n] [-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.

       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

       In addition to the options common to all programs based on libnetpbm (most notably -quiet,
       see
        Common  Options  ⟨index.html#commonoptions⟩  ), pgmnoise recognizes the following command
       line options:

       -maxval=n
              The maxval of the generated image.

              Default is 255.

              This option was new in Netpbm 10.63 (June 2013).

       -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

       •

              pbmnoise(1)

       •

              pgm(1)

AUTHOR

       Copyright (C) 1993 by Frank Neumann

DOCUMENT SOURCE

       This  manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master
       documentation is at

              http://netpbm.sourceforge.net/doc/pgmnoise.html