# pbmnoise > Generate white noise. > More information: . - 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}}`