Provided by: libsane-common_1.0.23-3ubuntu3.1_amd64 
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/lib/arch_triplet/sane/libsane-coolscan3.a
The static library implementing this backend.
/usr/lib/arch_triplet/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 András Major (andras@users.sourceforge.net).
11 Jul 2008 sane-coolscan3(5)