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FAX2TIFF(1)		    General Commands Manual		   FAX2TIFF(1)

NAME
       fax2tiff	- create a TIFF	Class F	fax file from raw fax data

SYNOPSIS
       fax2tiff	[ options ] [ -o output.tif ] input.raw

DESCRIPTION
       Fax2tiff	 creates  a  TIFF file containing CCITT	Group 3	or Group 4 en-
       coded data from one or more files containing ``raw'' Group 3 or Group 4
       encoded	data  (typically  obtained directly from a fax modem).	By de-
       fault, each row of data in the resultant	TIFF file  is  1-dimensionally
       encoded	and padded or truncated	to 1728	pixels,	as needed.  The	resul-
       tant image is a set of low resolution (98 lines/inch) or	medium resolu-
       tion  (196  lines/inch) pages, each of which is a single	strip of data.
       The generated file conforms to the TIFF Class F (FAX) specification for
       storing	facsimile  data.  This means, in particular, that each page of
       the data	does not include the trailing return to	control	(RTC) code; as
       required	 for  transmission  by	the CCITT Group	3 specifications.  The
       old, ``classic'', format	is created if the -c  option  is  used.	  (The
       Class F format can also be requested with the -f	option.)

       The  default  name  of the output image is fax.tif; this	can be changed
       with the	-o option.  Each input file is assumed to be a	separate  page
       of  facsimile  data  from  the same document.  The order	in which input
       files are specified on the command line is the order in which  the  re-
       sultant pages appear in the output file.

OPTIONS
       Options that affect the interpretation of input data are:

       -3     Assume input data	is CCITT Group 3 encoded (default).

       -4     Assume input data	is CCITT Group 4 encoded.

       -U     Assume input data	is uncompressed	(Group 3 or Group 4).

       -1     Assume  input  data is encoded with the 1-dimensional version of
	      the CCITT	Group 3	Huffman	encoding algorithm (default).

       -2     Assume input data	is 2-dimensional version of the	CCITT Group  3
	      Huffman encoding algorithm.

       -P     Assume  input data is not	EOL-aligned (default). This option has
	      effect with Group	3 encoded input	only.

       -A     Assume input data	is EOL-aligned.	This option  has  effect  with
	      Group 3 encoded input only.

       -M     Treat input data as having bits filled from most significant bit
	      (MSB) to most least bit (LSB).

       -L     Treat input data as having bits filled  from  least  significant
	      bit (LSB)	to most	significant bit	(MSB) (default).

       -B     Assume input data	was encoded with black as 0 and	white as 1.

       -W     Assume  input  data  was	encoded	with black as 1	and white as 0
	      (default).

       -R     Specify the vertical resolution, in lines/inch, of the input im-
	      ages.   By  default input	are assumed to have a vertical resolu-
	      tion of 196 lines/inch.  If images are low resolution facsimile,
	      a	value of 98 lines/inch should be specified.

       -X     Specify  the  width, in pixels, of the input images.  By default
	      input are	assumed	to have	a width	of 1728	pixels.

       Options that affect the output file format are:

       -o     Specify the name of the output file.

       -7     Force output to be compressed with the CCITT Group 3 Huffman en-
	      coding algorithm (default).

       -8     Force output to be compressed with the CCITT Group 4 Huffman en-
	      coding.

       -u     Force output to be uncompressed (Group 3 or Group	4).

       -5     Force output to be encoded with the 1-dimensional	version	of the
	      CCITT Group 3 Huffman encoding algorithm.

       -6     Force output to be encoded with the 2-dimensional	version	of the
	      CCITT Group 3 Huffman encoding algorithm (default).

       -a     Force the	last bit of each End Of	Line (EOL) code	to land	 on  a
	      byte boundary (default). This ``zero padding'' will be reflected
	      in the contents of the Group3Options tag of the  resultant  TIFF
	      file. This option	has effect with	Group 3	encoded	output only.

       -p     Do not EOL-align output. This option has effect with Group 3 en-
	      coded output only.

       -c     Generate "classic" Group 3 TIFF format.

       -f     Generate TIFF Class F (TIFF/F) format (default).

       -m     Force output data	to have	bits filled from most significant  bit
	      (MSB) to most least bit (LSB).

       -l     Force   output  data  to have bits filled	from least significant
	      bit (LSB)	to most	significant bit	(MSB) (default).

       -r     Specify the number of rows (scanlines) in	 each  strip  of  data
	      written  to  the	output	file.	By default (or when value 0 is
	      specified), tiffcp attempts to set the rows/strip	that  no  more
	      than 8 kilobytes of data appear in a strip (with except of G3/G4
	      compression schemes). If you specify special value  -1  it  will
	      results in infinite number of the	rows per strip.	The entire im-
	      age will be the one strip	in that	case. This is default in  case
	      of G3/G4 output compression schemes.

       -s     Stretch  the input image vertically by writing each input	row of
	      data twice to the	output file.

       -v     Force fax2tiff to	print the number of rows of data it  retrieved
	      from the input file.

       -z     Force output to be compressed with the LZW encoding.

DIAGNOSTICS
       The  following  warnings	 and errors come from the decoding routines in
       the library.

       Warning,	%s: Premature EOL at scanline %d (x %d).\n.   The  input  data
       had  a row that was shorter than	the expected width.  The row is	padded
       with white.

       %s: Premature EOF at scanline %d	(x %d).\n.  The	 decoder  ran  out  of
       data  in	 the  middle  of a scanline.  The resultant row	is padded with
       white.

       %s: Bad code word at row	%d, x %d\n.  An	invalid	Group 3	code  was  en-
       countered while decoding	the input file.	 The row number	and horizontal
       position	is given.  The remainder of the	input row is discarded,	 while
       the corresponding output	row is padded with white.

       %s: Bad 2D code word at scanline	%d.\n.	An invalid Group 4 or 2D Group
       3 code was encountered while decoding the input file.  The  row	number
       and  horizontal	position  is given.  The remainder of the input	row is
       discarded, while	the corresponding output row is	padded with white.

BUGS
       Input data are assumed to have a	a ``top	left'' orientation; it	should
       be possible to override this assumption from the	command	line.

SEE ALSO
       CCITT  Recommendation T.4 (Standardization of Group 3 Facsimile Appara-
       tus for Document	Transmission).

       The Spirit of TIFF Class	F, an appendix to the TIFF  5.0	 specification
       prepared	by Cygnet Technologies.

       tiffinfo(1), tiffdither(1), tiffgt(1), libtiff(3)

       Libtiff library home page: http://www.simplesystems.org/libtiff/

libtiff			       November	2, 2005			   FAX2TIFF(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | DIAGNOSTICS | BUGS | SEE ALSO

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