Provided by: libsane-common_1.0.27-3.2ubuntu3_all 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 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 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 @CONFIGDIR@/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  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

       @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  configuration  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 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 "@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

       René Rebe

AUTHOR

       René Rebe and Meino Christian Cramer

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