pnmsmooth
Smooth out a PNM image.
TLDR
Smooth out a PNM image using a convolution matrix of size 3x3
$ pnmsmooth [path/to/input.pnm] > [path/to/output.pnm]
Smooth out a PNM image using a convolution matrix of size width times height
$ pnmsmooth -width [width] -height [height] [path/to/input.pnm] > [path/to/output.pnm]
