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sane-coolscan2(5)								sane-coolscan2(5)

       sane-coolscan2 - SANE backend for Nikon Coolscan film scanners

       The  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. Please  report
       any strange behaviour to the maintainer of the backend.

       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.

       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 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 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

       --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.

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


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

	      Multiply	all exposure times with this value. This allows exposure correction with-
	      out modifying white balance.

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

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

	      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.

       The configuration file /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 configuration 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

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

       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

       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.

	      The static library implementing this backend.

	      The shared library implementing this  backend  (present  on  systems  that  support
	      dynamic loading).

	      Configuration file for this backend, read each time the backend is initialized.

	      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.

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

       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 (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	initialized,  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 scan-
       ners  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	maintainer  or	the  SANE
       developers' email list.

       The backend is written and maintained by Andras Major (andras@users.sourceforge.net).

					    22/08/2002				sane-coolscan2(5)
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