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<B><A HREF="sane-avision.5.html">sane-avision(5)</A></B> SANE Scanner Access Now Easy <B><A HREF="sane-avision.5.html">sane-avision(5)</A></B>
</PRE>
<H2>NAME</H2><PRE>
sane-avision - SANE backend for Avision branded and Avision OEM (HP,
Minolta, Mitsubishi, UMAX and possibly more) flatbed and film scanners.
</PRE>
<H2>DESCRIPTION</H2><PRE>
The <B>sane-avision</B> library implements a SANE (Scanner Access Now Easy)
backend that provides access to various Avision scanners and the Avi-
sion OEM scanners labelled by HP, Minolta, Mitsubishi or Fujitsu.
It is fully big-endian aware and in everyday use on PowerPC and SPARC
systems.
<B>I</B> <B>suggest</B> <B>you</B> <B>hold</B> <B>one</B> <B>hand</B> <B>on</B> <B>the</B> <B>power-button</B> <B>of</B> <B>the</B> <B>scanner</B> <B>while</B>
<B>you</B> <B>try</B> <B>the</B> <B>first</B> <B>scans</B> <B>-</B> <B>especially</B> <B>with</B> <B>film-scanners!</B>
</PRE>
<H2>CONFIGURATION</H2><PRE>
The configuration file for this backend resides in
<I>/usr/local/etc/sane.d/avision.conf</I>.
Its contents is a list of device names that correspond to Avision and
Avision compatible scanners and backend-options. Empty lines and lines
starting with a hash mark (#) are ignored. A sample configuration file
is shown below:
# this is a comment
option force-a4
option force-a3
option skip-adf
option disable-gamma-table
option disable-calibration
#scsi Vendor Model Type Bus Channel ID LUN
scsi AVISION
scsi HP
scsi /dev/scanner
usb 0x03f0 0x0701
force-a4:
Forces the backend to overwrite the scanable area returned by
the scanner to ISO A4. Scanner that are known to return bogus
data are marked in the backend so if you need this option please
report this to the backend maintainer. USE WITH CARE!
force-a3:
Forces the backend to overwrite the scanable area returned by
the scanner to ISO A3. Scanner that are known to return bogus
data are marked in the backend so if you need this option please
report this to the backend maintainer. USE WITH CARE!
skip-adf:
Forces the backend to ignore an inconsistent ADF status returned
by the scanner (ADF not present, but ADF model number non-zero).
Without this option, the backend will make several attempts to
reset the ADF and retry the query in this situation, and will
fail with a "not supported" error if the ADF still doesn't
respond.
disable-gamma-table:
Disables the usage of the scanner's gamma-table. You might try
this if your scans hang or only produce random garbage.
disable-calibration:
Disables the scanner's color calibration. You might try this if
your scans hang or only produce random garbage.
Note: Any option above modifies the default code-flow for your scan-
ner. The options should only be used when you encounter problems
with the default behavior of the backend. Please report the need
of options to the backend-author so the backend can be fixed as
soon as possible.
</PRE>
<H2>DEVICE NAMES</H2><PRE>
This backend expects device names of the form:
<I>scsi</I> <I>scsi-spec</I>
<I>usb</I> <I>usb-spec</I>
Where <I>scsi-spec</I> is the path-name to a special device or a device ID for
the device that corresponds to a SCSI scanner. The special device name
must be a generic SCSI device or a symlink to such a device, for exam-
ple on Linux <I>/dev/sga</I> or <I>/dev/sg0</I>. The device ID is the ID returned by
the scanner, for example "HP" or "AVISION". See <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B> for
details.
Note: Since the backend now includes native USB access, it is no
longer needed - even considered obsolete - to access USB scanner
via the SCSI emulation (named hpusbscsi on Linux) for Avision
USB devices such as the HP 53xx, HP 74xx or Minolta film-scan-
ners.
<I>usb-spec</I> is the USB device name, the vendor/product ID pair or the name
used by libusb corresponding to the USB scanner. For example "0x03f0
0x0701" or "libusb:002:003". See <B><A HREF="sane-usb.5.html">sane-usb(5)</A></B> for details.
The program <B><A HREF="sane-find-scanner.1.html">sane-find-scanner(1)</A></B> helps to find out the correct scsi or
usb device name.
A list with supported devices is built into the avision backend so nor-
mally specifying an ID should not be necessary.
</PRE>
<H2>FILES</H2><PRE>
<I>/usr/local/etc/sane.d/avision.conf</I>
The backend configuration file (see also description of
<B>SANE_CONFIG_DIR</B> below).
<I>/usr/local/lib/sane/libsane-avision.a</I>
The static library implementing this backend.
<I>/usr/local/lib/sane/libsane-avision.so</I>
The shared library implementing this backend (present on systems
that support dynamic loading).
</PRE>
<H2>ENVIRONMENT</H2><PRE>
<B>SANE_CONFIG_DIR</B>
This environment variable specifies the list of directories that
may contain the configuration file. On *NIX systems, the direc-
tories are separated by a colon (`:'), under OS/2, they are sep-
arated by a semi-colon (`;'). If this variable is not set, the
configuration file is searched in two default directories:
first, the current working directory (".") and then in
<I>/usr/local/etc/sane.d</I>. If the value of the environment variable
ends with the directory separator character, then the default
directories are searched after the explicitly specified directo-
ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
would result in directories <I>tmp/config</I>, <I>.</I>, and
<I>/usr/local/etc/sane.d</I> being searched (in this order).
<B>SANE_DEBUG_AVISION</B>
If the library was compiled with debug support enabled, this
environment variable controls the debug level for this backend.
Higher debug levels increase the verbosity of the output. The
debug level 7 is the author's preferred value to debug backend
problems.
Example: export SANE_DEBUG_AVISION=7
</PRE>
<H2>SEE ALSO</H2><PRE>
<B><A HREF="sane.7.html">sane(7)</A></B>, <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B>, <B><A HREF="sane-usb.5.html">sane-usb(5)</A></B>
<I>http://exactcode.com/site/open</I><B>_</B><I>source/saneavision</I>
</PRE>
<H2>MAINTAINER</H2><PRE>
Ren<B>e</B> Rebe
</PRE>
<H2>AUTHOR</H2><PRE>
Ren<B>e</B> Rebe and Meino Christian Cramer
11 Jul 2008 <B><A HREF="sane-avision.5.html">sane-avision(5)</A></B>
</PRE>
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