Updated: 20 June 2004
Table Of Contents
pgmtopbm - convert a PGM image to PBM
[-floyd | -fs | -threshold
| -dither8 | -d8 | -cluster3
| -c3 | -cluster4 | -c4
| -cluster8 | -c8]
This program is part of Netpbm.
This program is obsolete since Netpbm 10.23 (July 2004). Use pamditherbw 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
pamditherbw is backward compatible with pgmtopbm
except that it
So use the manual for pamditherbw for pgmtopbm, except
ignore anything that says it was added after Netpbm Release 10.23
and ignore any options that are not shown in the synopsis above.
- does the correct gamma adjustments.
- produces PAM output instead of PBM. (Modern Netpbm programs that
accept PBM input also accept PAM input, but if you need actual PBM,
you can use pamtopbm with pamditherbw).
If you just want to convert a PGM image with maxval 1 to PBM,