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Pbmtog3 User Manual(0)					Pbmtog3 User Manual(0)

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

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

DESCRIPTION
       This program is part of Netpbm(1).

       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 signficant
	      bit.  Apparently, there is some ambiguity in transmission proto‐
	      cols  so	that  the  bits get reversed on transmission, and this
	      compensates 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 option.  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 Recommendation T.4.

SEE ALSO
       g3topbm(1), pbm(1)

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

netpbm documentation		   July 2002		Pbmtog3 User Manual(0)

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