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

FILES

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

/sane/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