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g32pbm(1)		     mgetty+sendfax manual		     g32pbm(1)

NAME
       g32pbm -	convert	a Group	3 fax file into	a portable bitmap

SYNOPSIS
       g32pbm [-reversebits] [-stretch]	[g3file]

DESCRIPTION
       Reads  a	 Group 3 fax file (raw or digifax) as input. If	no filename is
       given, stdin is used.  Produces a portable bitmap as output.

OPTIONS
       -r     Tells g32pbm to interpret	bits least-significant first,  instead
	      of  the  default	most-significant first ("-reversebits").  Some
	      fax modems do it one way and others do it	the other way. If  you
	      get  a  whole  bunch  of "invalid	code" messages (nearly one per
	      line), try using this flag.

       -s     Double each horizontal row of the	 fax  file  in	the  pbm  file
	      ("-stretch)".   You can use this to adjust the aspect ratio of a
	      "normal resolution" fax file to match that of  a	"fine  resolu-
	      tion"  fax  file.	 This might not	seem like it belongs here, but
	      it's much	faster than using pnmscale|pgmtopbm later.  -s is  ac-
	      tivated  automatically  if  the file is specified	on the command
	      line and its name	starts with "fn..." (fax/normal).

       -l(aserjet)
	      Instead of a portable bitmap (PBM), output  HP  laserjet	files,
	      suitable for direct printing on a	HP laserjet or desjket.

       -d <dpi>
	      Scale  output to <dpi> dots per inch before printing. Normal FAX
	      resolution is 204x196 dpi	(fine mode),  or  204x98  dpi  (normal
	      mode).  In LaerJet mode, only the	values 75, 150 and 300 are al-
	      lowed for	<dpi>.

       -t     turn image by 90 degrees clockwise.  Multiple  -t	 commands  in-
	      crease  angle,  that  is,	-t -t will turn	it upside down,	and so
	      on.

       -?     Print a short command syntax.

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

BUGS
       g32pbm could be smarter about the image width, at the moment, the maxi-
       mum  width is 1728 pixels, and the maximum height is 4300 lines.	Every-
       thing bigger is just cut	off.

       Only 'raw' pbm files are	created.

       Scaling is too slow.

       Turning is too slow (and	not yet	fully implemented either).

SEE ALSO
       pbm2g3(1), pbm(5), g3cat(1), sendfax(8),	mgetty(1)

AUTHOR
       g32pbm is Copyright (C) 1993 by Gert Doering, <gert@greenie.muc.de>. It
       is  similar  to	the g3topbm program in Jef Poskanzers pbmplus package,
       but it's	a complete re-write. No	code is	copied.

greenie				   27 Oct 93			     g32pbm(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | REFERENCES | BUGS | SEE ALSO | AUTHOR

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