Provided by: libtiff-tools_4.0.3-7_amd64 bug

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 encoded data from one or
       more files containing ``raw'' Group 3 or Group 4 encoded data (typically obtained directly
       from  a  fax  modem).   By  default,  each  row  of  data  in  the  resultant TIFF file is
       1-dimensionally encoded and padded or truncated to 1728 pixels, as needed.  The  resultant
       image  is  a  set  of low resolution (98 lines/inch) or medium resolution (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
       resultant 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  images.   By  default
              input  are  assumed to have a vertical resolution 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 encoding algorithm
              (default).

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

       -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 encoded 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 image 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  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.

       %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  Apparatus  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.remotesensing.org/libtiff/