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       sane-coolscan2 - SANE backend for Nikon Coolscan film scanners


       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
       development  can not and will not function properly from the very first
       day. Please report any strange  behaviour  to  the  maintainer  of  the

       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  (
       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).

              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 maintain the white balance, while --ae will adjust
              each channel separately.

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

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

              Eject  the  film  strip  or  mounted  slide when using the slide

              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 case-sensitive:

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

       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.


              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 scanners to 36 bytes, discarding vital information about
       the  scanner.  The  IEEE 1394 models therefore only work with 2.4.19 or

       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   András   Major

                                  11 Jul 2008                sane-coolscan2(5)