Provided by: libsane_1.0.19-6ubuntu1_i386 bug

NAME

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

ABOUT THIS FILE

       This  file  is  a short descripton 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
       Avision 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
       /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 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!

       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
              scanner.  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
       example  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-
              scanners.

       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
       normally specifying an ID should not be necessary.

FILES

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

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

       /usr/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
              configuration  file  is  searched  in  two  default directories:
              first,  the  current  working  directory  (".")  and   then   in
              /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 directories.  For
              example, setting SANE_CONFIG_DIR to "/tmp/config:" would  result
              in   directories  "tmp/config",  ".",  and  "/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 prefered value to debug backend
              problems.

              Example: export SANE_DEBUG_AVISION=7

SEE ALSO

       sane(7), sane-scsi(5), sane-usb(5)
       http://www.exactcode.de/oss/avision/

AUTHOR

       René Rebe and Meino Christian Cramer