# pbmtog3

Updated: 02 October 1989
Index

## NAME

pbmtog3 - convert a portable bitmap into a Group 3 fax file

## SYNOPSIS

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

## DESCRIPTION

Reads a PBM image as input. 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 protocols so that the bits get reversed on transmission, and this compensates for that. If you get a whole bunch of "bad code word" messages, 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 pbmtog4 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).

## REFERENCES

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

## SEE ALSO

g3topbm, pbm

## AUTHOR

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

## Index

NAME
SYNOPSIS
DESCRIPTION
REFERENCES
SEE ALSO
AUTHOR