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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.

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 everyday 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/lo-
       cal/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 re-
	      spond.

       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  de-
       tails.

       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(1) 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/lo-
	      cal/etc/sane.d.	If  the	value of the environment variable ends
	      with the directory separator character, then the default	direc-
	      tories  are searched after the explicitly	specified directories.
	      For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
	      sult in directories tmp/config, ., and /usr/local/etc/sane.d be-
	      ing searched (in this order).

       SANE_DEBUG_AVISION
	      If the library was compiled with debug support enabled, this en-
	      vironment	 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

				  11 Jul 2008		       sane-avision(5)

NAME | DESCRIPTION | CONFIGURATION | DEVICE NAMES | FILES | ENVIRONMENT | SEE ALSO | MAINTAINER | AUTHOR

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