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+.TH sane\-leo 5 "11 Jul 2008" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
+.IX sane\-leo
+.SH NAME
+sane\-leo \- SANE backend for LEO Technologies scanners
+.SH DESCRIPTION
+The
+.B 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
+.B beta-quality
+software! LEO scanners were also sold under the Across Technologies brand.
+.PP
+The scanners that should work with this backend are:
+.PP
+.RS
+.ft CR
+.nf
+   Vendor Model           status
+----------------------  -----------
+  Across FS-1130          tested
+  Leo S3                  tested
+.fi
+.ft R
+.RE
+
+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.
+
+.br
+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 
+.RS
+scanimage \-\-help \-d leo
+.RE
+
+.TP
+.B Scan Mode
+
+.TP
+.B \-\-mode
+selects the basic mode of operation of the scanner valid choices are 
+.I Black & White
+,
+.I Grayscale
+and
+.I 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.
+
+.TP
+.B \-\-resolution
+selects the resolution for a scan. The scanner can do all resolutions
+between 1 and 300, in increments of 1.
+
+
+.TP
+.B Geometry options
+
+.TP
+.B \-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.
+
+
+.TP
+.B Enhancement options
+
+.TP
+.B \-\-custom\-gamma
+(grayscale and color mode only) allows the user to specify a gamma table (see the
+next 3 parameters).
+
+.TP 
+.B \-\-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.
+
+.TP 
+.B \-\-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.
+
+.TP
+.B \-\-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.
+
+.TP
+.B \-\-halftone
+(Black & White only) select the halftone mask to use. Possible values are 
+.I Diamond
+,
+.I 8x8 Coarse Fatting
+,
+.I 8x8 Fine Fatting
+,
+.I 8x8 Bayer
+and
+.I 8x8 Vertical Line
+
+.TP 
+.B \-\-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".
+
+
+.SH CONFIGURATION FILE
+The configuration file @CONFIGDIR@/leo.conf supports only one information: the device name to use (eg /dev/scanner).
+
+
+.SH FILES
+.TP
+.I @LIBDIR@/libsane\-leo.a
+The static library implementing this backend.
+.TP
+.I @LIBDIR@/libsane\-leo.so
+The shared library implementing this backend (present on systems that
+support dynamic loading).
+
+
+.SH ENVIRONMENT
+.TP
+.B 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.
+
+
+.SH 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.
+
+
+.SH BUGS
+
+None known.
+
+
+.SH "SEE ALSO"
+
+sane\-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)
+
+
+.SH AUTHOR
+
+.TP
+The package is actively maintained by Frank Zago.
+.I http://www.zago.net/sane/#leo