1Pbmtog3 User Manual(0)                                  Pbmtog3 User Manual(0)
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NAME

6       pbmtog3 - convert a PBM image into a Group 3 MH fax file
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SYNOPSIS

10       pbmtog3 [-reversebits] [-nofixedwidth] [pbmfile]
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DESCRIPTION

14       This program is part of Netpbm(1).
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16       pbmtog3  reads  a PBM image as input and produces a Group 3 MH fax file
17       as output.
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19       You can also generate a TIFF file that uses the same  encoding  inside,
20       with pamtotiff.
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22       There is no program in Netpbm that generates other fax formats, such as
23       MR and MMR, but pamtotiff can generate TIFF files that use those encod‐
24       ings.
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OPTIONS

28       -reversebits
29              This  option  causes  the  output to have the bits in every byte
30              reversed so the least signficant bit becomes the most signficant
31              bit.  Apparently, there is some ambiguity in transmission proto‐
32              cols so that the bits get reversed  on  transmission,  and  this
33              compensates  for  that.   If  you get a whole bunch of "bad code
34              word" messages when you try to  read  the  G3  file  (e.g.  with
35              g3topbm,  try using this option.  Note that the output is not G3
36              when you use this option.
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39       -nofixedwidth
40              Most fax machines expect the image to be 1728 columns  wide,  so
41              pbmtog3  cuts  the output to this width by default.  If you want
42              to keep the width of the original image, use this option.
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44              This option was new in Netpbm 10.6 (July  2002).   Before  that,
45              pbmtog3 always kept the width of the original image.
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SEE ALSO

51       g3topbm(1), pamtotiff(1), pbm(1) faxformats(1)
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AUTHOR

56       Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
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60netpbm documentation           03 December 2008         Pbmtog3 User Manual(0)