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(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 den-
sity printing|High contrast printing
controls the scanner internal gamma correction.
--custom-gamma
Allows the user to specify a gamma table (see the next 3 parame-
ters). 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 de-
fault.
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 en-
vironment 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)
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