pbmtog3

   Updated: July 2002
   Table Of Contents

NAME

   pbmtog3 - convert a PBM image into a Group 3 fax file

SYNOPSIS

   pbmtog3 [-reversebits] [-nofixedwidth] [pbmfile]

DESCRIPTION

   This program is part of Netpbm.

   pbmtog3  reads a PBM image as input and produces a Group 3 fax
file as
   output.

OPTIONS

   -reversebits
	  This option causes the output to have the bits in every
byte reversed
	  so  the  least  signficant bit becomes the most signfi-
cant bit.
	  Apparently, there is	some  ambiguity	 in  transmission
protocols so that
	  the bits get reversed on transmission, and this compen-
sates for that.
	  If you get a whole bunch of "bad  code  word"	 messages
when you try to
	  read the G3 file (e.g. with g3topbm, try using this op-
tion. Note that
	  the output is not G3 when you use this option.

   -nofixedwidth
	  Most	fax machines expect the image to be 1728  columns
wide, so
	  pbmtog3  cuts	 the  output to this width by default. If
you want to keep
	  the width of the original image, use this option.

	  This option was new in Netpbm 10.6 (July 2002).  Before
that, pbmtog3
	  always kept the width of the original image.



REFERENCES

   The	standard  for Group 3 fax is defined in CCITT Recommenda-
tion T.4.

SEE ALSO

   g3topbm, pbm

AUTHOR

   Copyright (C) 1989 by Paul Haeberli .
     _________________________________________________________________



Table Of Contents

     * NAME
     * SYNOPSIS
     * DESCRIPTION
     * REFERENCES
     * SEE ALSO
     * AUTHOR

UNIX/Linux commands referenced on this page:

1. convert
2. as
3. file
4. g3topbm