Pgmnoise User Manual(1) General Commands Manual Pgmnoise User Manual(1)
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 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
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 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
•
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
netpbm documentation 27 June 2013 Pgmnoise User Manual(1)
Generated by dwww version 1.15 on Sat Jun 29 02:31:55 CEST 2024.