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<H1>sane-leo</H1>
Section: SANE Scanner Access Now Easy (5)<BR>Updated: 11 Jul 2008<BR><A HREF="#index">Index</A>
<A HREF="/cgi-bin/man/man2html">Return to Main Contents</A><HR>
<A NAME="ixAAB"></A>
<A NAME="lbAB">&nbsp;</A>
<H2>NAME</H2>
sane-leo - SANE backend for LEO Technologies scanners
<A NAME="lbAC">&nbsp;</A>
<H2>DESCRIPTION</H2>
The
<B>sane-leo</B>
library implements a SANE (Scanner Access Now Easy) backend that
provides access to some LEO SCSI flatbed scanners. This backend
should be considered
<B>beta-quality</B>
software! LEO scanners were also sold under the Across Technologies brand.
<P>
The scanners that should work with this backend are:
<P>
<DL COMPACT><DT id="1"><DD>
<PRE>
Vendor Model status
---------------------- -----------
Across FS-1130 tested
Leo S3 tested
</PRE>
</DL>
<P>
The options the backend supports can either be selected through
command line options to programs like scanimage or through GUI
elements in xscanimage or xsane.
<P>
<BR>
If you have any strange behavior, please report to the backend
maintainer or to the SANE mailing list.
<P>
Valid command line options and their syntax can be listed by using
<DL COMPACT><DT id="2"><DD>
scanimage --help -d leo
</DL>
<P>
<DL COMPACT>
<DT id="3"><B>Scan Mode</B>
<DD>
<P>
<DT id="4"><B>--mode</B>
<DD>
selects the basic mode of operation of the scanner valid choices are
<I>Black &amp; White</I>
,
<I>Grayscale</I>
and
<I>Color</I>
The Black &amp; White mode is black and white only (1 bit). Grayscale
will produce 256 levels of gray (8 bits). Color will produce a 24 bits
color image.
<P>
<DT id="5"><B>--resolution</B>
<DD>
selects the resolution for a scan. The scanner can do all resolutions
between 1 and 300, in increments of 1.
<P>
<P>
<DT id="6"><B>Geometry options</B>
<DD>
<P>
<DT id="7"><B>-l -t -x -y</B>
<DD>
control the scan area: -l sets the top left x coordinate, -t the top
left y coordinate, -x selects the width and -y the height of the scan
area. All parameters are specified in millimeters by default.
<P>
<P>
<DT id="8"><B>Enhancement options</B>
<DD>
<P>
<DT id="9"><B>--custom-gamma</B>
<DD>
(grayscale and color mode only) allows the user to specify a gamma table (see the
next 3 parameters).
<P>
<DT id="10"><B>--red-gamma-table</B>
<DD>
(color mode only) can be used to download a user defined
gamma table for the red channel. The table must be 256 bytes long.
<P>
<DT id="11"><B>--green-gamma-table</B>
<DD>
(color mode only) can be used to download a user defined
gamma table for the green channel. The table must be 256 bytes long.
<P>
<DT id="12"><B>--blue-gamma-table</B>
<DD>
(color mode only) can be used to download a user defined gamma table
for the blue channel. The table must be 256 bytes long.
<P>
<DT id="13"><B>--halftone</B>
<DD>
(Black &amp; White only) select the halftone mask to use. Possible values are
<I>Diamond</I>
,
<I>8x8 Coarse Fatting</I>
,
<I>8x8 Fine Fatting</I>
,
<I>8x8 Bayer</I>
and
<I>8x8 Vertical Line</I>
<P>
<DT id="14"><B>--preview</B>
<DD>
requests a preview scan. The resolution used for that scan is 28 dpi
and the scan area is the maximum allowed. The scan mode is user
selected. The default is &quot;no&quot;.
<P>
<P>
</DL>
<A NAME="lbAD">&nbsp;</A>
<H2>CONFIGURATION FILE</H2>
The configuration file @CONFIGDIR@/leo.conf supports only one information: the device name to use (eg /dev/scanner).
<P>
<P>
<A NAME="lbAE">&nbsp;</A>
<H2>FILES</H2>
<DL COMPACT>
<DT id="15"><I>@LIBDIR@/libsane-leo.a</I>
<DD>
The static library implementing this backend.
<DT id="16"><I>@LIBDIR@/libsane-leo.so</I>
<DD>
The shared library implementing this backend (present on systems that
support dynamic loading).
<P>
<P>
</DL>
<A NAME="lbAF">&nbsp;</A>
<H2>ENVIRONMENT</H2>
<DL COMPACT>
<DT id="17"><B>SANE_DEBUG_LEO</B>
<DD>
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend. E.g.,
a value of 128 requests all debug output to be printed. Smaller levels
reduce verbosity.
<P>
<P>
</DL>
<A NAME="lbAG">&nbsp;</A>
<H2>LIMITATIONS</H2>
The windows TWAIN driver has many more options than this SANE
backend. However they are only software adjustments. This backend only
implements what the scanner can support.
<P>
<P>
<A NAME="lbAH">&nbsp;</A>
<H2>BUGS</H2>
<P>
None known.
<P>
<P>
<A NAME="lbAI">&nbsp;</A>
<H2>SEE ALSO</H2>
<P>
<A HREF="/cgi-bin/man/man2html?5+sane-scsi">sane-scsi</A>(5), <A HREF="/cgi-bin/man/man2html?1+scanimage">scanimage</A>(1), <A HREF="/cgi-bin/man/man2html?1+xscanimage">xscanimage</A>(1), <A HREF="/cgi-bin/man/man2html?1+xsane">xsane</A>(1), <A HREF="/cgi-bin/man/man2html?7+sane">sane</A>(7)
<P>
<P>
<A NAME="lbAJ">&nbsp;</A>
<H2>AUTHOR</H2>
<P>
<DL COMPACT>
<DT id="18">The package is actively maintained by Frank Zago.<DD>
<I><A HREF="http://www.zago.net/sane/#leo">http://www.zago.net/sane/#leo</A></I>
<P>
</DL>
<HR>
<A NAME="index">&nbsp;</A><H2>Index</H2>
<DL>
<DT id="19"><A HREF="#lbAB">NAME</A><DD>
<DT id="20"><A HREF="#lbAC">DESCRIPTION</A><DD>
<DT id="21"><A HREF="#lbAD">CONFIGURATION FILE</A><DD>
<DT id="22"><A HREF="#lbAE">FILES</A><DD>
<DT id="23"><A HREF="#lbAF">ENVIRONMENT</A><DD>
<DT id="24"><A HREF="#lbAG">LIMITATIONS</A><DD>
<DT id="25"><A HREF="#lbAH">BUGS</A><DD>
<DT id="26"><A HREF="#lbAI">SEE ALSO</A><DD>
<DT id="27"><A HREF="#lbAJ">AUTHOR</A><DD>
</DL>
<HR>
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