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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(1) or through GUI elements in
       xscanimage(1) or	xsane(1).

       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 scanim-
       age(1):

       --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  scanim-
	      age(1), perform a	batch scan with	batch-count=2 to obtain	the IR
	      information.

       --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 known identifiers. This  is  the  de-
	      fault action 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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