sane-leo(5) SANE Scanner Access Now Easy sane-leo(5)NAMEsane-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 coor-
dinate, -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 Fat-
ting , 8x8 Fine Fatting , 8x8 Bayer and 8x8 Verti-
cal Line
--preview
requests a preview scan. The resolution used for
that scan is 28 dpi and the scan area is the maxi-
mum allowed. The scan mode is user selected. The
default is "no".
CONFIGURATION FILE
The configuration file /usr/freeware/etc/sane.d/leo.conf
supports only one information: the device name to use (eg
/dev/scanner).
FILES
/usr/freeware/lib32/sane/libsane-leo.a
The static library implementing this backend.
/usr/freeware/lib32/sane/libsane-leo.so
The shared library implementing this backend (pre-
sent 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 ALSOsane-scsi(5), scanimage(1), xscanimage(1), xsane(1),
sane(7)AUTHOR
The package is actively maintained by Frank Zago.
http://fz.eryx.net/sane/#leo
sane-backends 1.0.12 16 April 2002 sane-leo(5)
