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(1) or through GUI elements in xscanimage(1) or xsane(1).

       Valid command line options and their syntax can be listed by using

              scanimage --help -d sceptre

       Scan Mode

       --mode Lineart|Halftone|Gray|Color
              Selects the basic mode of operation of the scanner.  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 50..1200
              Selects the resolution for a scan. The scanner can do several resolutions between 50 and 1200.

       --halftone-pattern 1|2|3|4
              Selects the pattern mode that is used in Halftone mode.

       --gamma-correction Default|User Defined|High Density Printing|Low density printing|High contrast printing
              controls the scanner internal gamma correction.

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

       --red-gamma-table
              Can be used to download a user defined gamma table for the red channel.  The  table  must  be  256
              bytes long.  Color mode only.

       --green-gamma-table
              Can  be  used  to download a user defined gamma table for the green channel. The table must be 256
              bytes long.  Color mode only.

       --blue-gamma-table
              Can be used to download a user defined gamma table for the blue channel. The  table  must  be  256
              bytes long.  Color mode only.

       --threshold 0..255
              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  item: the device name to use (eg
       /dev/scanner).

FILES

       /usr/lib/x86_64-linux-gnu/sane/libsane-sceptre.a
              The static library implementing this backend.

       /usr/lib/x86_64-linux-gnu/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)