bionic (5) sane-coolscan2.5.gz
NAME
sane-coolscan2 - SANE backend for Nikon Coolscan film scanners
DESCRIPTION
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 (andras@users.sourceforge.net) 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 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).
--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 @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 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
@LIBDIR@/libsane-coolscan2.a
The static library implementing this backend.
@LIBDIR@/libsane-coolscan2.so
The shared library implementing this backend (present on systems that support dynamic loading).
@CONFIGDIR@/coolscan2.conf
Configuration file for this backend, read each time the backend is initialized.
ENVIRONMENT
SANE_DEBUG_COOLSCAN2
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 backend maintainer or the SANE developers' email
list.
AUTHORS
The backend is written and maintained by András Major (andras@users.sourceforge.net). @PACKAGEVERSION@ 11 Jul 2008 sane-coolscan2(5)