Provided by: libsane_1.0.19-6ubuntu1_i386 bug

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

       /usr/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