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# sane-avision.5

    sane-avision(5)          SANE Scanner Access Now Easy          sane-avision(5)

## NAME

           sane-avision  - SANE backend for original Avision and Avision OEM scan‐
           ners (HP, Minolta, Mitsubishi, UMAX and possibly more) flatbed and film
           scanners.

## ABOUT THIS FILE

           This  file  is a short description for the avision-backend shipped with
           SANE.

## DESCRIPTION

           The sane-avision 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 every-day use on PowerPC and  SPARC
           systems.

           I  suggest  you  hold one hand on the power-button of the scanner while
           you try the first scans - especially with film-scanners!

## CONFIGURATION

           The    configuration    file    for    this    backend    resides    in
           /usr/local/etc/sane.d/avision.conf.

           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 produces random garbage.

           disable-calibration:
                  Disables the scanner's color calibration. You might try this  if
                  your scans hang or only produces 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 be- haviour of the backend. Please report the
                  need of options to the backend-author  so  the  backend  can  be
                  fixed as soon as possible.

## DEVICE NAMES

           This backend expects device names of the form:

                  scsi scsi-spec

                  usb usb-spec

           Where scsi-spec 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 "/dev/sga" or "/dev/sg0". The device ID is the ID returned
           by  the  scanner,  for  example "HP" or "AVISION". See sane-scsi(5) 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.

           usb-spec 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 sane-usb(5) for details.

           The program sane-find-scanner 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.

## FILES

           /usr/local/etc/sane.d/avision.conf
                  The  backend  configuration  file  (see  also   description   of
                  SANE_CONFIG_DIR below).

           /usr/local/lib/sane/libsane-avision.a
                  The static library implementing this backend.

           /usr/local/lib/sane/libsane-avision.so
                  The shared library implementing this backend (present on systems
                  that support dynamic loading).

## ENVIRONMENT

           SANE_CONFIG_DIR
                  This environment variable specifies the list of directories that
                  may contain the configuration file.  Under UNIX, the directories
                  are separated by a colon (`:'), under OS/2, they  are  separated
                  by a semi-colon (`;').  If this variable is not set, the config‐
                  uration file is searched in two default directories: first,  the
                  current     working     directory     (".")    and    then    in
                  /usr/local/etc/sane.d.  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 SANE_CONFIG_DIR to "/tmp/config:"
                  would   result   in   directories   "tmp/config",    ".",    and
                  "/usr/local/etc/sane.d" being searched (in this order).

           SANE_DEBUG_AVISION
                  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

## SEE ALSO

           sane(7), sane-scsi(5), sane-usb(5)
           http://exactcode.com/site/open_source/saneavision/

## MAINTAINER

           René Rebe

## AUTHOR

           René Rebe and Meino Christian Cramer

                                      11 Jul 2008                  sane-avision(5)