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.TH g3topbm 1 "02 October 1989"
.IX g3topbm
.SH NAME
g3topbm - convert a Group 3 fax file into a portable bitmap
.SH SYNOPSIS
.B g3topbm
.RB [ -kludge ]
.RB [ -reversebits ]
.RB [ -stretch ]
.RI [ g3file ]
.SH DESCRIPTION
Reads a Group 3 fax file as input.
.IX "Group 3 fax"
.IX fax
Produces a portable bitmap as output.
.SH OPTIONS
.TP
.B -kludge
Tells
.I g3topbm
to ignore the first few lines of the file;
sometimes fax files have some junk at the beginning.
.TP
.B -reversebits
Tells
.I 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.
.TP
.B -stretch
Tells
.I g3topbm
to stretch the image vertically by
duplicating each row.
This is for the low-quality transmission mode.
.PP
All flags can be abbreviated to their shortest unique prefix.
.SH REFERENCES
The standard for Group 3 fax is defined in CCITT Recommendation T.4.
.SH BUGS
Probably.
.SH "SEE ALSO"
pbmtog3(1), pbm(5)
.SH 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.
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