Convert a PBM image to an Epson printer graphic. See also:
pbmtoescp2
. More information: https://netpbm.sourceforge.net/doc/pbmtoepson.html.
pbmtoepson path/to/image.pbm > path/to/output.epson
pbmtoepson -protocol escp9|escp path/to/image.pbm > path/to/output.epson
pbmtoepson -dpi 60|72|80|90|120|144|240 path/to/image.pbm > path/to/output.epson