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+.TH sane\-coolscan3 5 "11 Jul 2008"  "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
+.IX sane\-coolscan3
+.SH NAME
+sane\-coolscan3 \- SANE backend for Nikon Coolscan film scanners
+.SH DESCRIPTION
+The
+.B 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 
+.B 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.
+
+.PP
+At present, the following scanners are known to work with this backend:
+.PP
+.RS
+.ft CR
+.nf
+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
+.fi
+.ft R
+.RE
+
+Please send mail to sane-devel@lists.alioth.debian.org to report successes 
+or failures.
+
+.SH 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 
+.RS
+scanimage \-\-help \-d coolscan3:<interface>:<device>
+.RE
+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 
+.RS
+scanimage \-L
+.RE
+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:
+.TP
+.I \-\-frame <n>
+This option specifies which frame to operate on, if a motorized film strip
+feeder or APS adapter are used. The frame number
+.I <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).
+.TP
+.I \-\-subframe <x>
+This option shifts the scan window by the specified amount (default
+unit is mm).
+.TP
+.I \-\-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.
+.TP
+.I \-\-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.
+.TP
+.I \-\-autofocus
+Perform autofocus operation. Unless otherwise specified by the other options (
+.I \-\-focus\-on\-centre
+and friends), focusing is performed on the centre of the selected scan area.
+.TP
+.I \-\-ae\-wb
+.TP
+.I \-\-ae
+Perform a pre-scan to calculate exposure values automatically.
+.I \-\-ae\-wb
+will maintain the white balance, while
+.I \-\-ae
+will adjust each channel separately.
+.TP
+.I \-\-exposure
+Multiply all exposure times with this value. This allows exposure
+correction without modifying white balance.
+.TP
+.I \-\-load
+Load the next slide when using the slide loader.
+.TP
+.I \-\-eject
+Eject the film strip or mounted slide when using the slide loader.
+.TP
+.I \-\-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 
+.I \-\-eject
+does not work.
+
+.SH CONFIGURATION FILE
+The configuration file @CONFIGDIR@/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:
+.TP
+.I blank or starting with a '#' character
+These lines are ignored, thus '#' can be used to include comments.
+.TP
+.I 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.
+.TP
+.I 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.
+
+.SH FILES
+.TP
+.I @LIBDIR@/libsane\-coolscan3.a
+The static library implementing this backend.
+.TP
+.I @LIBDIR@/libsane\-coolscan3.so
+The shared library implementing this backend (present on systems that
+support dynamic loading).
+.TP
+.I @CONFIGDIR@/coolscan3.conf
+Configuration file for this backend, read each time the backend is
+initialized.
+
+.SH ENVIRONMENT
+.TP
+.B 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.
+
+.SH "SEE ALSO"
+sane\-scsi(5), sane\-usb(5), scanimage(1), xscanimage(1), xsane(1)
+
+.SH BUGS
+Currently, the SANE protocol does not allow automatically updating options
+whenever the hardware changes. Thus the number of choices for the
+.B \-\-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.
+
+.SH AUTHORS
+coolscan3 written by A. Zummo (a.zummo@towertech.it), based heavily on
+coolscan2 written by Andr\['a]s Major (andras@users.sourceforge.net). 
+