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       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 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

              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

       Enhancement options

              (grayscale  and  color  mode  only) allows the user to specify a
              gamma table (see the next 3 parameters).

              (color mode only) can be used to download a user  defined  gamma
              table for the red channel. The table must be 256 bytes long.

              (color  mode  only) can be used to download a user defined gamma
              table for the green channel. The table must be 256 bytes long.

              (color mode only) can be used to download a user  defined  gamma
              table for the blue channel. The table must be 256 bytes long.

              (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

              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).


              The static library implementing this backend.

              The shared library implementing this backend (present on systems
              that support dynamic loading).


              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.


       None known.


       sane-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)


       The package is actively maintained by Frank Zago.

                                  11 Jul 2008                      sane-leo(5)