Provided by: libsane-common_1.0.27-3.2ubuntu3_all bug


       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 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 ( 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 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.

              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 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 @CONFIGDIR@/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
       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  maintainer  or  the  SANE
       developers' email list.


       The backend is written and maintained by AndrĂ¡s Major (

@PACKAGEVERSION@                           11 Jul 2008                          sane-coolscan2(5)