sane-leo - SANE backend for LEO Technologies scanners
The sane-leo library implements a SANE (Scanner Access Now
Easy) backend that provides access to some LEO SCSI flatbed scanners. This
backend should be considered beta-quality software! LEO scanners were
also sold under the Across Technologies brand.
The scanners that should work with this backend are:
Vendor Model status
---------------------- -----------
Across FS-1130 tested
LEO S3 tested
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).
If you have any strange behavior, please report to the backend
maintainer or to the SANE mailing list.
Valid command line options and their syntax can be listed by
using
scanimage --help -d leo
- Scan Mode
-
- --mode
- selects the basic mode of operation of the scanner. Valid choices are
Black & White, Grayscale and Color. The Black
& White mode is black and white only (1 bit). Grayscale
mode will produce 256 levels of gray (8 bits). Color mode will
produce a 24 bit color image.
- --resolution
- selects the resolution for a scan. The scanner can do all resolutions
between 1 and 300, in increments of 1.
- 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.
- Enhancement
options
-
- --custom-gamma
- (grayscale and 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.
- --halftone
- (Black & White only) select the halftone mask to use. Possible values
are Diamond, 8x8 Coarse Fatting, 8x8 Fine Fatting,
8x8 Bayer and 8x8 Vertical Line.
- --preview
- requests a preview scan. The resolution used for that scan is 28 dpi and
the scan area is the maximum allowed. The scan mode is user selected. The
default is "no".
The configuration file /etc/sane.d/leo.conf supports only
one information: the device name to use (eg /dev/scanner).
- /usr/lib/x86_64-linux-gnu/sane/libsane-leo.a
- The static library implementing this backend.
- /usr/lib/x86_64-linux-gnu/sane/libsane-leo.so
- The shared library implementing this backend (present on systems that
support dynamic loading).
- SANE_DEBUG_LEO
- 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.
The windows TWAIN driver has many more options than this SANE
backend. However they are only software adjustments. This backend only
implements what the scanner can support.