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.
For backward compatibility, you can alternatively specify the width and height as arguments.
This program is part of Netpbm.
pamnoise creates a PAM image that is made up of random samples.
In addition to the options common to all programs based on libnetpbm (most notably -quiet, see Common Options), pgmnoise recognizes the following command line options:
Default is 1.
Default is 1.
Default is 1.
Default is 255.
Default is a null string.
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.
pamnoise was written by Akira F Urushibata in 2026 and contributed to the public domain by its author.
pamnoise was new in Netpbm 11.16 (September 2026).
Before that, you can use pgmnoise to make a single plane of random numbers and pamstack to combine single planes into deeeper PAM images.