G3TOPBM

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.
      The -kludge flag tells g3topbm to ignore the first few lines of the
      file; sometimes FAX files have some junk at the beginning.
      The -reversebits flag 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.
      The -stretch flag 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.

SEE ALSO

      pbmtog3(1), pbm(5)

AUTHOR

      Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
      Permission to use, copy, modify, and distribute this software and its
      documentation for any purpose and without fee is hereby granted,
      provided that the above copyright notice appear in all copies and that
      both that copyright notice and this permission notice appear in
      supporting documentation.  This software is provided "as is" without
      express or implied warranty.