NAME

g3topbm - convert a Group 3 FAX file into a portable bitmap

SYNOPSIS

g3topbm [-kludge][-reversebits][-stretch] [g3file]

DESCRIPTION

Reads a Group 3 FAX file as input.  Produces a portable bitmap as output. 

The -kludge flag tells g3topbm to ignore the first few lines of the file; sometimes FAX files have some junk at the beginning. 

The -reversebits flag tells g3topbm to interpret bits least-significant first, instead of the default most-significant first.  Apparently some FAX modems do it one way and others do it the other way.  If you get a whole bunch of "bad code word" messages, try using this flag. 

The -stretch flag tells g3topbm to stretch the image vertically by duplicating each row.  This is for the low-quality transmission mode. 

All flags can be abbreviated to their shortest unique prefix. 

REFERENCES

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

SEE ALSO

pbmtog3(1), pbm(5)

AUTHOR

Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>. 
 
Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation.  This software is provided "as is" without express or implied warranty.

Amiga Unix  —  Last change: 02 October 1989