sane-leo(5)

1sane-leo(5)              SANE Scanner Access Now Easy              sane-leo(5)
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NAME

6       sane-leo - SANE backend for LEO Technologies scanners
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DESCRIPTION

9       The  sane-leo library implements a SANE (Scanner Access Now Easy) back‐
10       end that provides access to some LEO SCSI flatbed scanners. This  back‐
11       end  should be considered beta-quality software! LEO scanners were also
12       sold under the Across Technologies brand.
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14       The scanners that should work with this backend are:
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16                 Vendor Model           status
17              ----------------------  -----------
18                Across FS-1130          tested
19                LEO S3                  tested
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21       The options the backend supports can either be selected through command
22       line  options  to programs like scanimage(1) or through GUI elements in
23       xscanimage(1) or xsane(1).
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25       If you have any strange behavior, please report to  the  backend  main‐
26       tainer or to the SANE mailing list.
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28       Valid command line options and their syntax can be listed by using
29              scanimage --help -d leo
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32       Scan Mode
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35       --mode selects  the  basic  mode  of  operation  of  the scanner. Valid
36              choices are Black & White, Grayscale and  Color.   The  Black  &
37              White mode is black and white only (1 bit).  Grayscale mode will
38              produce 256 levels of gray (8 bits).  Color mode will produce  a
39              24 bit color image.
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42       --resolution
43              selects  the resolution for a scan. The scanner can do all reso‐
44              lutions between 1 and 300, in increments of 1.
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48       Geometry options
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51       -l -t -x -y
52              control the scan area: -l sets the top left x coordinate, -t the
53              top left y coordinate, -x selects the width and -y the height of
54              the scan area. All parameters are specified  in  millimeters  by
55              default.
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59       Enhancement options
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62       --custom-gamma
63              (grayscale  and  color  mode  only) allows the user to specify a
64              gamma table (see the next 3 parameters).
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67       --red-gamma-table
68              (color mode only) can be used to download a user  defined  gamma
69              table for the red channel. The table must be 256 bytes long.
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72       --green-gamma-table
73              (color  mode  only) can be used to download a user defined gamma
74              table for the green channel. The table must be 256 bytes long.
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77       --blue-gamma-table
78              (color mode only) can be used to download a user  defined  gamma
79              table for the blue channel. The table must be 256 bytes long.
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82       --halftone
83              (Black  &  White only) select the halftone mask to use. Possible
84              values are Diamond, 8x8 Coarse Fatting, 8x8  Fine  Fatting,  8x8
85              Bayer and 8x8 Vertical Line.
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88       --preview
89              requests a preview scan. The resolution used for that scan is 28
90              dpi and the scan area is the maximum allowed. The scan  mode  is
91              user selected. The default is "no".
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CONFIGURATION FILE

96       The  configuration file /etc/sane.d/leo.conf supports only one informa‐
97       tion: the device name to use (eg /dev/scanner).
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FILES

102       /usr/lib64/sane/libsane-leo.a
103              The static library implementing this backend.
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105       /usr/lib64/sane/libsane-leo.so
106              The shared library implementing this backend (present on systems
107              that support dynamic loading).
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ENVIRONMENT

112       SANE_DEBUG_LEO
113              If the library was compiled with debug support enabled, this en‐
114              vironment variable controls the debug level  for  this  backend.
115              E.g.,  a  value  of 128 requests all debug output to be printed.
116              Smaller levels reduce verbosity.
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LIMITATIONS

121       The windows TWAIN driver has many more options than this SANE  backend.
122       However  they  are  only software adjustments. This backend only imple‐
123       ments what the scanner can support.
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BUGS

128       None known.
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AUTHOR

138       The package is actively maintained by Frank Zago.
139              http://www.zago.net/sane/#leo
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143                                  11 Jul 2008                      sane-leo(5)