g3topbm(1)              UNIX System V(02 October 1989)               g3topbm(1)


NAME
      g3topbm - convert a Group 3 fax file into a portable bitmap

SYNOPSIS
      g3topbm [-kludge] [-reversebits] [-stretch] [g3file]

DESCRIPTION
      Reads a Group 3 fax file as input.  Produces a portable bitmap as output.

OPTIONS
      -kludge
            Tells g3topbm to ignore the first few lines of the file; sometimes
            fax files have some junk at the beginning.

      -reversebits
            Tells g3topbm to interpret bits least-significant first, instead of
            the default most-significant first.  Apparently some fax modems do
            it one way and others do it the other way.  If you get a whole
            bunch of "bad code word" messages, try using this flag.

      -stretch
            Tells g3topbm to stretch the image vertically by duplicating each
            row.  This is for the low-quality transmission mode.

      All flags can be abbreviated to their shortest unique prefix.

REFERENCES
      The standard for Group 3 fax is defined in CCITT Recommendation T.4.

BUGS
      Probably.

SEE ALSO
      pbmtog3(1), pbm(5)

AUTHOR
      Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.

















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