sane-avision

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  @CONFIGDIR@/avi-
       sion.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
       @CONFIGDIR@/avision.conf
              The  backend  configuration  file  (see  also   description   of
              SANE_CONFIG_DIR below).

       @LIBDIR@/libsane-avision.a
              The static library implementing this backend.

       @LIBDIR@/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 @CONFIGDIR@.  If the
              value of the environment variable ends with the directory  sepa-
              rator 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 "@CONFIGDIR@"  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
       Rene Rebe

AUTHOR
       Rene Rebe and Meino Christian Cramer

@PACKAGEVERSION@                  11 Jul 2008                  sane-avision(5)
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