pgmtopbm man page

pgmtopbm — convert a PGM image to PBM



[-floyd | -fs | -threshold | -hilbert | -dither8 | -d8 | -cluster3 | -c3 | -cluster4 | -c4 | -cluster8 | -c8]

[-value val]

[-clump size]



This program is part of Netpbm(1).

This program is obsolete since Netpbm 10.23 (July 2004).  Use pamditherbw(1) to do what this program used to do.

pgmtopbm never was the simple converter it appeared to be. It was a dithering program.  Unfortunately, it didn't do the dithering properly because it treated the PGM input samples as if they were directly proportional to light intensity, but they are actually gamma-adjusted.

pamditherbw is backward compatible with pgmtopbm except that it

If you just want to convert a PGM image with maxval 1 to PBM, use pamtopnm(1)

Document Source

This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at


20 June 2004 netpbm documentation