pbmtoybm – convert a portable bitmap into a Bennet Yee “face” file
Reads a portable bitmap as input. Produces as output a file acceptable
to the face and xbm programs by Bennet Yee (email@example.com).
ybmtopbm, pbm(5), face(1), face(5), xbm(1)
Copyright (C) 1991 by Jamie Zawinski and Jef Poskanzer.
06 March 1990 pbmtoybm