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<H1>g3topbm</H1>
Section: User Commands (1)<BR>Updated: 02 October 1989<BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
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<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
g3topbm - convert a Group 3 fax file into a portable bitmap
<A NAME="lbAC">&nbsp;</A>
<H2>SYNOPSIS</H2>
<B>g3topbm</B>
[<B>-kludge</B>]
[<B>-reversebits</B>]
[<B>-stretch</B>]
[<I>g3file</I>]
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<H2>DESCRIPTION</H2>
Reads a Group 3 fax file as input.
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Produces a portable bitmap as output.
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<H2>OPTIONS</H2>
<DL COMPACT>
<DT id="1"><B>-kludge</B>
<DD>
Tells
<I>g3topbm</I>
to ignore the first few lines of the file;
sometimes fax files have some junk at the beginning.
<DT id="2"><B>-reversebits</B>
<DD>
Tells
<I>g3topbm</I>
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 &quot;bad code word&quot; messages, try using this
flag.
<DT id="3"><B>-stretch</B>
<DD>
Tells
<I>g3topbm</I>
to stretch the image vertically by
duplicating each row.
This is for the low-quality transmission mode.
</DL>
<P>
All flags can be abbreviated to their shortest unique prefix.
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<H2>REFERENCES</H2>
The standard for Group 3 fax is defined in CCITT Recommendation T.4.
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<H2>BUGS</H2>
Probably.
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<H2>SEE ALSO</H2>
<A HREF="/cgi-bin/man/man2html?1+pbmtog3">pbmtog3</A>(1), <A HREF="/cgi-bin/man/man2html?5+pbm">pbm</A>(5)
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<H2>AUTHOR</H2>
Copyright (C) 1989 by Paul Haeberli &lt;<A HREF="mailto:paul@manray.sgi.com">paul@manray.sgi.com</A>&gt;.
<P>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="4"><A HREF="#lbAB">NAME</A><DD>
<DT id="5"><A HREF="#lbAC">SYNOPSIS</A><DD>
<DT id="6"><A HREF="#lbAD">DESCRIPTION</A><DD>
<DT id="7"><A HREF="#lbAE">OPTIONS</A><DD>
<DT id="8"><A HREF="#lbAF">REFERENCES</A><DD>
<DT id="9"><A HREF="#lbAG">BUGS</A><DD>
<DT id="10"><A HREF="#lbAH">SEE ALSO</A><DD>
<DT id="11"><A HREF="#lbAI">AUTHOR</A><DD>
</DL>
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