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sane-coolscan2(5)	 SANE Scanner Access Now Easy	     sane-coolscan2(5)

NAME
       sane-coolscan2 -	SANE backend for Nikon Coolscan	film scanners

DESCRIPTION
       The  sane-coolscan2 library implements a	SANE (Scanner Access Now Easy)
       backend that provides access to Nikon  Coolscan	film  scanners.	  Some
       functions  of  this backend should be considered	beta-quality software.
       Most functions have been	stable for a long time,	but of course new  de-
       velopment  can  not  and	will not function properly from	the very first
       day. Please report any strange behaviour	to the maintainer of the back-
       end.

       At present, the following scanners are known to work with this backend:

	      Model:			   Connection Type
	      ---------------------------  -------------------
	      LS-30 (Coolscan III)	   SCSI
	      LS-2000			   SCSI
	      LS-40 ED (Coolscan IV)	   USB
	      LS-4000 ED		   IEEE	1394
	      LS-8000 ED		   IEEE	1394

       Please  send  mail to the backend author	(andras@users.sourceforge.net)
       to report successes or failures.

OPTIONS
       The options the backend supports	can either be selected through command
       line  options to	programs like scanimage	or through GUI elements	in xs-
       canimage	or xsane.

       Valid command line options and their syntax can be listed by using
	      scanimage	--help -d coolscan2:<interface>:<device>
       where <interface> and <device> specify the device in  question,	as  in
       the configuration file (see next	section). The -d parameter and its ar-
       gument can be omitted to	obtain information on the first	scanner	 iden-
       tified. Use the command
	      scanimage	-L
       to list all devices recognized by your SANE installation.

       The  options  should  be	fully described	by the description or tooltips
       given by	frontend. Here is a description	of some	of the most  important
       options,	in the syntax with which they must be supplied to scanimage:

       --frame _n_
	      This  option specifies which frame to operate on,	if a motorized
	      film strip feeder	or APS adapter are used. The frame number  _n_
	      ranges from 1 to the number of frames available, which is	sensed
	      each time	the backend is	initialized  (usually  each  time  you
	      start the	frontend).

       --subframe _x_
	      This  option shifts the scan window by the specified amount (de-
	      fault unit is mm).

       --infrared=yes/no
	      If set to	"yes", the scanner will	 read  the  infrared  channel,
	      thus  allowing defect removal in software. The infrared image is
	      read during a second scan, with no options altered. The  backend
	      must  not	be restarted between the scans.	 If you	use scanimage,
	      perform a	batch scan with	batch-count=2 to obtain	the IR	infor-
	      mation.

       --depth _n_
	      Here <n> can either be 8 or the maximum number of	bits supported
	      by the scanner (10, 12, or 14). It specifies whether or not  the
	      scanner  reduces the scanned data	to 8 bits before sending it to
	      the backend. If 8	bits are used, some information	and thus image
	      quality  is  lost, but the amount	of data	is smaller compared to
	      higher depths. Also, many	imaging	 programs  and	image  formats
	      cannot handle depths greater than	8 bits.

       --autofocus
	      Perform  autofocus  operation. Unless otherwise specified	by the
	      other options ( --focus-on-centre	and friends), focusing is per-
	      formed on	the centre of the selected scan	area.

       --ae-wb

       --ae   Perform  a  pre-scan to calculate	exposure values	automatically.
	      --ae-wb will maintain the	white balance, while --ae will	adjust
	      each channel separately.

       --exposure
	      Multiply	all  exposure times with this value. This allows expo-
	      sure correction without modifying	white balance.

       --load Load the next slide when using the slide loader.

       --eject
	      Eject the	film strip or  mounted	slide  when  using  the	 slide
	      loader.

       --reset
	      Reset  scanner. The scanner will perform the same	action as when
	      power is turned on: it will eject	the film strip	and  calibrate
	      itself.  Use  this  whenever  the	scanner	refuses	to load	a film
	      strip properly, as a result of which --eject does	not work.

CONFIGURATION FILE
       The configuration file  /usr/local/etc/sane.d/coolscan2.conf  specifies
       the  device(s)  that  the  backend will use. Owing to the nature	of the
       supported connection types SCSI,	USB, and IEEE 1394, the	 default  con-
       figuration file supplied	with the SANE distribution should work without
       being edited.

       Each line in the	configuration file is either of	the  following,	 where
       all entries are case-sensitive:

       blank or	starting with a	'#' character
	      These  lines  are	 ignored, thus '#' can be used to include com-
	      ments.

       containing only the word	"auto"
	      This instructs the backend to probe for a	 scanner  by  scanning
	      the  buses for devices with know identifiers. This is the	action
	      taken when no configuration file is present.

       a line of the form _interface_:_device_
	      Here <interface> can be one of "scsi" or "usb", and <device>  is
	      the  device file of the scanner. Note that IEEE 1394 devices are
	      handled by the SBP-2 module in the kernel	and appear to SANE  as
	      SCSI devices.

FILES
       /usr/local/lib/sane/libsane-coolscan2.a
	      The static library implementing this backend.

       /usr/local/lib/sane/libsane-coolscan2.so
	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

       /usr/local/etc/sane.d/coolscan2.conf
	      Configuration file for this backend, read	each time the  backend
	      is initialized.

ENVIRONMENT
       SANE_DEBUG_COOLSCAN2
	      If the library was compiled with debug support enabled, this en-
	      vironment	variable controls the debug level  for	this  backend.
	      E.g.,  a	value  of 128 requests all debug output	to be printed.
	      Smaller levels reduce verbosity.

SEE ALSO
       sane-scsi(5), sane-usb(5), scanimage(1),	xscanimage(1), xsane(1)

BUGS
       Currently, the SANE protocol does not allow automatically updating  op-
       tions whenever the hardware changes. Thus the number of choices for the
       --frame option will be fixed when the backend is	 initialized  (usually
       when  the  user	runs the frontend). In particular, if there is no film
       strip in	the automatic film strip feeder	when the backend  is  initial-
       ized,  the  frame  option  will not appear at all. Also,	restarting the
       frontend	after swapping film adapters is	strongly recommended.

       Linux kernels prior to 2.4.19 had a patch that truncated	 INQUIRY  data
       from IEEE 1394 scanners to 36 bytes, discarding vital information about
       the scanner. The	IEEE 1394 models therefore only	work  with  2.4.19  or
       later.

       No  real	 bugs  currently known,	please report any to the backend main-
       tainer or the SANE developers' email list.

AUTHORS
       The  backend  is	 written  and  maintained   by	 Andras	  Major	  (an-
       dras@users.sourceforge.net).

				  11 Jul 2008		     sane-coolscan2(5)

NAME | DESCRIPTION | OPTIONS | CONFIGURATION FILE | FILES | ENVIRONMENT | SEE ALSO | BUGS | AUTHORS

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