sane-matsushita - SANE backend for Panasonic KV-SS high speed scanners
DESCRIPTION
The
sane-matsushita
library implements a SANE (Scanner Access Now Easy) backend that
provides access to some Panasonic KV-SS high speed scanners. This
backend is stable.
At present, the following scanners are known to work with this
backend:
(*) WARNING: None of the advanced options of these scanners are available (ie no color, no high resolution, no automatic cropping). Basically, the driver does no more than what it does for the KV-SS25. I don't have access to such scanners, and thus cannot add these options.
Other Panasonic high speed scanners may or may not work with that backend.
Valid command line options and their syntax can be listed by using
scanimage --help -d matsushita
Scan Mode
--mode
selects the basic mode of operation of the scanner.
--resolution
selects the resolution for a scan. Each model supports all or a subset of these resolutions: 100, 150, 200, 240, 300, 360, 400.
--duplex
indicates whether to scan both side of the sheet.
--feeder-mode
selects the number of pages to scan (one or until the tray is empty).
Geometry
--paper-size A4|...|Legal|Letter [A4]
options selects the area to scan. It adjust the
-l -t -x -y
options accordingly. It does not need to be the real size of the paper.
-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. It is possible to use
the option
--paper-size
instead.
Enhancement
--brightness
controls the brightness of the acquired image. The value varies from 1 to 255, or less, depending on the scanner model.
--contrast
controls the contrast of the acquired image. Some models do not support that option.
--automatic-threshold
automatically sets brightness, contrast, white level, gamma, noise reduction and image emphasis. These options are not available when automatic-threshold is in use.
--halftone-pattern
option sets the tonal gradation for the halftone mode. Pattern downloading is not implemented by the backend.
--autoseparation
provides automatic separation of text and images.
--white-level
option indicate the source of the white base.
--noise-reduction
reduces the isolated dot noise. This option is not supported by all scanners.
--image-emphasis
option sets the image emphasis. Some selection are not available on all scanners.
--gamma
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.
CONFIGURATION FILE
The configuration file /etc/sane.d/matsushita.conf supports the device name to use (eg /dev/scanner) and the SCSI option to auto-detect the scanners supported.
FILES
/usr/lib/sane/libsane-matsushita.a
The static library implementing this backend.
/usr/lib/sane/libsane-matsushita.so
The shared library implementing this backend (present on systems that
support dynamic loading).
ENVIRONMENT
SANE_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.
LIMITATIONS
Memory in the KV-SS 25
The KV-SS 25 has not enough internal memory to scan a whole A4 page in duplex mode at high resolution. The frontend will return a memory error in that case. Apparently, the KV-SS 25D has not that problem.
Pattern and gamma downloading
The scanner, with the proper firmware, can download a halftone pattern
and a gamma table. This is not implemented.
Sub-areas
The scanner can support up to 3 sub-areas on each side to define some
more precise enhancement options. This is not implemented.
Duplex mode
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.
SCANNING EXAMPLE
To date, the only frontend capable of using this scanner at full speed is
scanadf.
