automatically sets brightness, contrast, white level, gamma, noise reduction and image emphasis. These options are not available when automatic-threshold is in use.
options set the gamma curve. It is only valid for Gray modes, and is not available on all scanners. Gamma downloading is not implemented by the backend.
The configuration file @CONFIGDIR@/matsushita.conf supports the device name to use (eg /dev/scanner) and the scsi option to autodetect the scanners supported.
.SHFILES
.TP
.I@LIBDIR@/libsane-matsushita.a
The static library implementing this backend.
.TP
.I@LIBDIR@/libsane-matsushita.so
The shared library implementing this backend (present on systems that
support dynamic loading).
.SHENVIRONMENT
.TP
.BSANE_DEBUG_MATSUSHITA
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.
.SHLIMITATIONS
.TP
.BPatternandgammadownloading
The scanner, with the proper firmware, can download a halftone pattern
and a gamma table. This is not implemented.
.TP
.BSub-areas
The scanner can support up to 3 sub-areas on each side to define some
more precise enhancment options. This is not implemented.
.TP
.BDuplexmode
The backend does not support the setting of different options for each side. The scan will occur with the same options (halftone pattern, brightness, image emphasis) for both sides.