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 back-
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-4000 ED IEEE 1394
LS-8000 ED IEEE 1394
Please send mail to the backend author (firstname.lastname@example.org)
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
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:
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).
This option shifts the scan window by the specified amount
(default unit is mm).
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 per-
formed 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 expo-
sure 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 sup-
ported connection types SCSI, USB, and IEEE 1394, the default configu-
ration file supplied with the SANE distribution should work without
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 com-
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
Configuration file for this backend, read each time the backend
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 (usu-
ally when the user runs the frontend). In particular, if there is no
film strip in the automatic film strip feeder when the backend is ini-
tialized, 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 main-
tainer or the SANE developers' email list.
The backend is written and maintained by Andras Major
11 Jul 2008 sane-coolscan2(5)
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