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Pgmtopbm User Manual(0)                                Pgmtopbm User Manual(0)



NAME
       pgmtopbm - convert a PGM image to PBM


SYNOPSIS
       pgmtopbm

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

       [-value val]

       [-clump size]

       [pgmfile]


DESCRIPTION
       This program is part of Netpbm(1).

       This program is obsolete since Netpbm 10.23 (July 2004).  Use pamditherbw(1)todowhatthisprogram 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


       ?      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).

              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.



netpbm documentation             20 June 2004          Pgmtopbm User Manual(0)