sane-sceptre.5

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 manufac‐
       turer 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 den‐
              sity 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 /usr/local/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)