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
       successes 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
              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.

       --autofocus
              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-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
              exposure 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
       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
              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 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/local/lib/sane/libsane-coolscan3.a
              The static library implementing this backend.

       /usr/local/lib/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
       (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 SANE developers'
       list.


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




                                  11 Jul 2008                sane-coolscan3(5)
