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  @CONFIGDIR@/leo.conf  supports only one information: the device name to use (eg
       /dev/scanner).

FILES

       @LIBDIR@/libsane-leo.a
              The static library implementing this backend.

       @LIBDIR@/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

@PACKAGEVERSION@                                   11 Jul 2008                                       sane-leo(5)