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sane-coolscan3(5)	 SANE Scanner Access Now Easy	     sane-coolscan3(5)

NAME
       sane-coolscan3 - SANE backend for Nikon Coolscan film scanners

DESCRIPTION
       The  sane-coolscan3 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
       development  can not and will not function properly from the very first
       day.

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

	      Model:			   Connection Type
	      ---------------------------  -------------------
	      LS-30 (Coolscan III)	   SCSI
	      LS-40 ED (Coolscan IV)	   USB
	      LS-50 ED (Coolscan V)	   USB
	      LS-2000			   SCSI
	      LS-4000 ED		   IEEE 1394
	      LS-8000 ED		   IEEE 1394

       Please send mail to sane-devel@lists.alioth.debian.org to  report  suc‐
       cesses 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
       xscanimage or xsane.

       Valid command line options and their syntax can be listed by using
	      scanimage --help -d coolscan3:<interface>:<device>
       where  <interface>  and	<device> specify the device in question, as in
       the configuration file (see next section). The  -d  parameter  and  its
       argument	 can  be  omitted  to  obtain information on the first scanner
       identified. 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
	      (default 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   /etc/sane.d/coolscan3.conf	specifies  the
       device(s) that the backend will use. Owing to the nature	 of  the  sup‐
       ported  connection types SCSI, USB, and IEEE 1394, the default configu‐
       ration 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/lib/arch_triplet/sane/libsane-coolscan3.a
	      The static library implementing this backend.

       /usr/lib/arch_triplet/sane/libsane-coolscan3.so
	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

       /etc/sane.d/coolscan3.conf
	      Configuration  file for this backend, read each time the backend
	      is initialized.

ENVIRONMENT
       SANE_DEBUG_COOLSCAN3
	      If the library was compiled with	debug  support	enabled,  this
	      environment  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
       options whenever the hardware changes. Thus the number of  choices  for
       the  --frame option will be fixed when the backend is initialized (usu‐
       ally when the user runs the frontend). In particular, if	 there	is  no
       film  strip in the automatic film strip feeder when the backend is ini‐
       tialized, 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 SANE developers'
       list.

AUTHORS
       coolscan3  written by A. Zummo (a.zummo@towertech.it), based heavily on
       coolscan2 written by András Major (andras@users.sourceforge.net).

				  11 Jul 2008		     sane-coolscan3(5)
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