sane-sceptre(5)          SANE Scanner Access Now Easy          sane-sceptre(5)



NAME
       sane-sceptre - SANE backend for SCEPTRE scanners

DESCRIPTION
       The sane-sceptre library implements a SANE (Scanner Access Now Easy)
       backend that provides access to Sceptre flatbed scanners. This backend
       should be considered beta-quality software! Please report any strange
       behavior to the maintainer of the backend or to the SANE mailing list.

       At present, only one scanner is known to work with this backend:

              Model                        Connection Type
              ---------------------------  -------------------
              Sceptre VividScan S1200      SCSI

       The make of this scanner is KINPO, so other scanners from that
       manufacturer may also work (eg. the S600).

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 sceptre


       Scan Mode


       --mode selects the basic mode of operation of the scanner valid choices
              are Lineart, Halftone, Gray and Color.  The Lineart and Halftone
              mode are black and white only (1 bit). Gray will produce 256
              levels of gray (8 bits). Color will produce a 24 bits color
              image. The scanner supports 30 bits internally but it only
              exports 24.


       --resolution
              selects the resolution for a scan. The scanner can do several
              resolutions between 50 and 1200.


       --halftone-pattern
              selects the pattern mode that is used in Halftone mode. Valid
              options are 1, 2, 3 and 4.


       --gamma-correction
              controls the scanner internal gamma correction. Valid options
              are "Default", "User defined", "High density printing" "Low
              density printing" and "High contrast printing".


       --custom-gamma
              (color mode only) allows the user to specify a gamma table (see
              the next 3 parameters).


       --red-gamma-table
              (color mode only) can be used to download a user defined gamma
              table for the red channel. The table must be 256 bytes long.


       --green-gamma-table
              (color mode only) can be used to download a user defined gamma
              table for the green channel. The table must be 256 bytes long.


       --blue-gamma-table
              (color mode only) can be used to download a user defined gamma
              table for the blue channel. The table must be 256 bytes long.


       --threshold
              sets the threshold for black and white pixels in lineart mode.
              Possible values are from 0 (darker) to 255 (lighter).


       --preview
              requests a preview scan. The resolution used for that scan is 30
              dpi and the scan area is the maximum allowed. The scan mode is
              user selected. The default is "no".


       The geometry options


       -l -t -x -y
              control the scan area: -l sets the top left x coordinate, -t the
              top left y coordinate, -x selects the width and -y the height of
              the scan area. All parameters are specified in millimeters by
              default.



CONFIGURATION FILE
       The configuration file /etc/sane.d/sceptre.conf supports only one
       information: the device name to use (eg /dev/scanner).



FILES
       /usr/local/lib/sane/libsane-sceptre.a
              The static library implementing this backend.

       /usr/local/lib/sane/libsane-sceptre.so
              The shared library implementing this backend (present on systems
              that support dynamic loading).



ENVIRONMENT
       SANE_DEBUG_SCEPTRE
              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.



LIMITATIONS
       Resolutions
              The windows TWAIN driver can be set to any resolution between 50
              to 1200 (excluding software interpolation). This backend cannot.
              Only a handful of resolution are available, although they should
              be numerous enough.



BUGS
       None known.



SEE ALSO
       sane-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)



AUTHOR
       The package is actively maintained by Frank Zago.
              http://www.zago.net/sane/#sceptre



                                  11 Jul 2008                  sane-sceptre(5)
