This program is part of Netpbm. pbmtoepson reads a PBM image as input and produces a stream of Epson printer graphics as output.
The input is from the file identified by the pbmfile argument or, if you don't specify pbmfile, from Standard Input. Output is to Standard Output.
The output is for traditional (ca 1991) Epson 9-wire dot matrix (sometimes called ESC/P 9-wire) printers or newer ESC/P printers. For a more modern Epson ESC/P2 type printer, try pbmtoescp2.
Before Netpbm 10.23 (July 2004), pbmtoepson could not produce ESC/P streams -- only ESC/P 9-wire.
The Epson printer protocols are described in Epson's protocol specification.
Note that there is no epsontopbm tool - this transformation is one way.
This option was new in Netpbm 10.23 (July 2004).
If you don't specify this, pbmtoepson chooses a horizontal print density for you consistent with your other options.
This option was new in Netpbm 10.23 (July 2004).
If you don't specify this, pbmtoepson selects adjacent dot printing unless that is incompatible with your other options.
This option was new in Netpbm 10.23 (July 2004).