sane-leo(5)              SANE Scanner Access Now Easy              sane-leo(5)



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/local/lib/sane/libsane-leo.a
              The static library implementing this backend.

       /usr/local/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)
