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 @CONFIGDIR@/sceptre.conf supports only one information: the device name to use (eg
       /dev/scanner).

FILES

       @LIBDIR@/libsane-sceptre.a
              The static library implementing this backend.

       @LIBDIR@/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

@PACKAGEVERSION@                                   11 Jul 2008                                   sane-sceptre(5)