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pbmnoise

Generate white noise. More information: https://netpbm.sourceforge.net/doc/pbmnoise.html.

Generate a PGM image containing white noise:

pbmnoise {{width}} {{height}} > {{path/to/output.pbm}}

Specify the seed for the pseudo-random number generator:

pbmnoise {{width}} {{height}} -randomseed {{value}} > {{path/to/output.pbm}}

Specify the desired rate of white to black pixels:

pbmnoise {{width}} {{height}} -ratio {{1/3}} > {{path/to/output.pbm}}