sane-sceptre - SANE backend for SCEPTRE scanners
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).
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.
The configuration file /etc/sane.d/sceptre.conf supports
only one item: the device name to use (eg /dev/scanner).
- /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).
- 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.
- 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.