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    Andrs    Major

                              11 Jul 2008                sane-coolscan2(5)


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