pgmtofs
converts PGM images to Usenix FaceSaver format, used for storing face images
TLDR
Convert PGM to Usenix FaceSaver format
$ pgmtofs [input.pgm] > [output.fs]
SYNOPSIS
pgmtofs [file]
DESCRIPTION
pgmtofs converts PGM images to Usenix FaceSaver format, used for storing face images for email and news systems. Part of Netpbm toolkit.