ppmspread
Displace the pixels in a PPM image by a randomized amount.
TLDR
Displace the pixels in a PPM image by a randomized amount that is at most a
$ ppmspread [a] [path/to/input_file.ppm] > [path/to/output_file.ppm]
Specify a seed to a the pseudo-random number generator
$ ppmspread [a] [path/to/input_file.ppm] -randomseed [seed] > [path/to/output_file.ppm]
