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<HTML>
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<TITLE>sane-avision.5</TITLE>
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<BODY BGCOLOR=#FFFFFF TEXT=#000000><H1 ALIGN=CENTER><IMG SRC="/images/sane.png" HEIGHT=117 WIDTH=346></H1>
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<H1>sane-avision.5</H1>
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<HR>
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<PRE>
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<!-- Manpage converted by man2html 3.0.1 -->
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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>
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</PRE>
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<H2>NAME</H2><PRE>
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sane-avision - SANE backend for original Avision and Avision OEM scan-
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ners (HP, Minolta, Mitsubishi, UMAX and possibly more) flatbed scan-
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ners.
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</PRE>
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<H2>ABOUT THIS FILE</H2><PRE>
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This file is a short descripton for the avision-backend shipped with
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SANE.
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</PRE>
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<H2>DESCRIPTION</H2><PRE>
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The <B>sane-avision</B> library implements a SANE (Scanner Access Now Easy)
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backend that provides access to various Avision scanners and the Avi-
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sion OEM scanners labelled by HP, Minolta, Mitsubishi or Fujitsu.
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<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>
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<B>you</B> <B>try</B> the first scans!
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</PRE>
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<H2>CONFIGURATION</H2><PRE>
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The configuration file for this backend resides in
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/usr/local/etc/sane.d/avision.conf.
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Its contents is a list of device names that correspond to Avision and
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Avision compatible scanners and backend-options. Empty lines and lines
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starting with a hash mark (#) are ignored. A sample configuration file
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is shown below:
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# this is a comment
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option force-a4
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option disable-gamma-table
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option disable-calibration
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option one-calib-only
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option old-calibration
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#scsi Vendor Model Type Bus Channel ID LUN
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scsi AVISION
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scsi HP
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scsi /dev/scanner
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usb 0x03f0 0x0701
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- force-a4:
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Forces the backend to overwrite the scanable area
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returned by the scanner. This might be needed for
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the AV 630 which returns no area - or newer scanners
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which retun the area in a unkown format our backend
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doesn't recongize yet.
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- disable-gamma-table:
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Disables the usage of the scanner's gamma-table. You
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might try this if your scans hang or only produces
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random garbage.
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- disable-calibration:
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Disables the scanner's color calibration. You
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might try this if your scans hang or only produces
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random garbage.
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- one-calib-only:
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When this option is enabled, the backend will only
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perform a calibration when the backend is initialized
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and not before each scan. This might extend the life
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of the CCD, but does not work reliable with the newer
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USB scanners (they hang sometimes or return garbage
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image data). So this option should be used with care.
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- old-calibration:
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This enables the use of the old calibration code for
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testing purposes.
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Note: Any option above modifies the default code-flow
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for your scanner. The options should only be used
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when you encounter problems with the default be-
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haviour of the backend. Please report the need of
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options to the backend-author so the backend can
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be fixed as soon as possible.
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</PRE>
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<H2>DEVICE NAMES</H2><PRE>
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This backend expects device names of the form:
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<I>scsi</I> <I>scsi-spec</I>
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<I>usb</I> <I>usb-sec</I>
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Where <I>scsi-spec</I> is the path-name to a special device or a device ID for
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the device that corresponds to a SCSI scanner. The special device name
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must be a generic SCSI device or a symlink to such a device, for exam-
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ple on Linux "/dev/sga" or "/dev/sg0". The device ID is the ID returned
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by the scanner, for example "HP" or "AVISION". See <B><A HREF="sane-scsi.5.html">sane-scsi(5)</A></B> for
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details.
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Note: Since the backend now includes native USB access,
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it is no longer needed - even considered obsolete -
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to access USB scanner via the SCSI emulation (named
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hpusbscsi on Linux) for Avision USB devices such as
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the HP 53xx, HP 74xx or Minolta film-scanners.
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<I>usb-spec</I> is the USB device name, the vendor/product ID pair or the name
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used by libusb corresponding to the USB scanner. For example "0x03f0
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0x0701" or "libusb:002:003". See <B><A HREF="sane-usb.5.html">sane-usb(5)</A></B> for details.
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The program <I>sane-find-scanner</I> helps to find out the correct scsi or usb
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device name.
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A list with supported devices is built into the avision backend so nor-
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mally specifying an ID should not be necessary.
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</PRE>
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<H2>FILES</H2><PRE>
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<I>/usr/local/etc/sane.d/avision.conf</I>
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The backend configuration file (see also description of
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<B>SANE_CONFIG_DIR</B> below).
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<I>/usr/local/lib/sane/libsane-avision.a</I>
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The static library implementing this backend.
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<I>/usr/local/lib/sane/libsane-avision.so</I>
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The shared library implementing this backend (present on systems
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that support dynamic loading).
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</PRE>
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<H2>ENVIRONMENT</H2><PRE>
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<B>SANE_CONFIG_DIR</B>
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This environment variable specifies the list of directories that
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may contain the configuration file. Under UNIX, the directories
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are separated by a colon (`:'), under OS/2, they are separated
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by a semi-colon (`;'). If this variable is not set, the config-
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uration file is searched in two default directories: first, the
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current working directory (".") and then in
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/usr/local/etc/sane.d. If the value of the environment variable
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ends with the directory separator character, then the default
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directories are searched after the explicitly specified directo-
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ries. For example, setting <B>SANE_CONFIG_DIR</B> to "/tmp/config:"
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would result in directories "tmp/config", ".", and
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"/usr/local/etc/sane.d" being searched (in this order).
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<B>SANE_DEBUG_AVISION</B>
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend.
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Higher debug levels increase the verbosity of the output. The
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debug level 7 is the author's prefered value to debug backend
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problems.
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Example: export SANE_DEBUG_AVISION=7
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</PRE>
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<H2>SEE ALSO</H2><PRE>
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<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>
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http://www.rocklinux-consulting.de/oss/avision/
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</PRE>
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<H2>AUTHOR</H2><PRE>
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Ren<65> Rebe and Meino Christian Cramer
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sane-backends 1.0.13 04 Mar 2003 <B><A HREF="sane-avision.5.html">sane-avision(5)</A></B>
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</PRE>
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