NAME
sane-leo - SANE backend for LEO Technologies scanners
DESCRIPTION
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 or through GUI elements in
xscanimage or xsane.
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 will produce 256
levels of gray (8 bits). Color will produce a 24 bits 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".
CONFIGURATION FILE
The configuration file /etc/sane.d/leo.conf supports only one
information: the device name to use (eg /dev/scanner).
FILES
/usr/lib/sane/libsane-leo.a
The static library implementing this backend.
/usr/lib/sane/libsane-leo.so
The shared library implementing this backend (present on systems
that support dynamic loading).
ENVIRONMENT
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.
LIMITATIONS
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.
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/#leo
11 Jul 2008 sane-leo(5)