1Pgmnoise User Manual(0)                                Pgmnoise User Manual(0)
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NAME

6       pgmnoise - create a PGM image made up of white noise
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SYNOPSIS

10       pgmnoise width height
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12       [-randomseed=integer]
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14       Minimum  unique  abbreviations  of  option are acceptable.  You may use
15       double hyphens instead of single hyphen to denote options.  You may use
16       white space in place of the equals sign to separate an option name from
17       its value.
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DESCRIPTION

22       This program is part of Netpbm(1).
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24       pgmnoise creates a PGM image that  is  made  up  of  pixels  of  random
25       brightness.  The maxval is 255.
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27       You specify the dimensions of the image with the width and height argu‐
28       ments.
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30       The randomness in the image is limited before  Netpbm  10.37  (December
31       2006)  --  if you run the program twice in the same second, you may get
32       identical output.
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OPTIONS

36       -randomseed=integer
37              This is the seed for the random number generator that  generates
38              the pixels.
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40              Use  this  to  ensure you get the same image on separate invoca‐
41              tions.
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43              By default, pgmnoise uses a seed derived from the  time  of  day
44              and  process  ID, which gives you fairly uncorrelated results in
45              multiple invocations.
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47              This option was new in Netpbm 10.45 (December 2008).
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SEE ALSO

53       pgm(1)
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AUTHOR

57       Copyright (C) 1993 by Frank Neumann
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61netpbm documentation           23 November 2008        Pgmnoise User Manual(0)