sane-avision - SANE backend for original Avision and Avision OEM
scanners (HP, Minolta, Mitsubishi, UMAX and possibly more) flatbed and film
scanners.
This file is a short description for the avision-backend shipped
with SANE.
The sane-avision library implements a SANE (Scanner Access
Now Easy) backend that provides access to various Avision scanners and the
Avision OEM scanners labelled by HP, Minolta, Mitsubishi or Fujitsu.
It is fully big-endian aware and in every-day use on PowerPC and
SPARC systems.
I suggest you hold one hand on the power-button of the scanner
while you try the first scans - especially with film-scanners!
The configuration file for this backend resides in
/etc/sane.d/avision.conf.
Its contents is a list of device names that correspond to Avision
and Avision compatible scanners and backend-options. Empty lines and lines
starting with a hash mark (#) are ignored. A sample configuration file is
shown below:
# this is a comment
option force-a4
option force-a3
option skip-adf
option disable-gamma-table
option disable-calibration
#scsi Vendor Model Type Bus Channel ID LUN
scsi AVISION
scsi HP
scsi /dev/scanner
usb 0x03f0 0x0701
- force-a4:
- Forces the backend to overwrite the scanable area returned by the scanner
to ISO A4. Scanner that are known to return bogus data are marked in the
backend so if you need this option please report this to the backend
maintainer. USE WITH CARE!
- force-a3:
- Forces the backend to overwrite the scanable area returned by the scanner
to ISO A3. Scanner that are known to return bogus data are marked in the
backend so if you need this option please report this to the backend
maintainer. USE WITH CARE!
- skip-adf:
- Forces the backend to ignore an inconsistent ADF status returned by the
scanner (ADF not present, but ADF model number non-zero). Without this
option, the backend will make several attempts to reset the ADF and retry
the query in this situation, and will fail with a "not
supported" error if the ADF still doesn't respond.
- disable-gamma-table:
- Disables the usage of the scanner's gamma-table. You might try this if
your scans hang or only produces random garbage.
- disable-calibration:
- Disables the scanner's color calibration. You might try this if your scans
hang or only produces random garbage.
- Note:
- Any option above modifies the default code-flow for your scanner. The
options should only be used when you encounter problems with the default
be- haviour of the backend. Please report the need of options to the
backend-author so the backend can be fixed as soon as possible.
This backend expects device names of the form:
scsi scsi-spec
usb usb-spec
Where scsi-spec is the path-name to a special device or a
device ID for the device that corresponds to a SCSI scanner. The special
device name must be a generic SCSI device or a symlink to such a device, for
example on Linux "/dev/sga" or "/dev/sg0". The device ID
is the ID returned by the scanner, for example "HP" or
"AVISION". See sane-scsi(5) for details.
- Note:
- Since the backend now includes native USB access, it is no longer needed -
even considered obsolete - to access USB scanner via the SCSI emulation
(named hpusbscsi on Linux) for Avision USB devices such as the HP 53xx, HP
74xx or Minolta film-scanners.
usb-spec is the USB device name, the vendor/product ID pair
or the name used by libusb corresponding to the USB scanner. For example
"0x03f0 0x0701" or "libusb:002:003". See sane-usb(5) for
details.
The program sane-find-scanner helps to find out the correct
scsi or usb device name.
A list with supported devices is built into the avision backend so
normally specifying an ID should not be necessary.
- /etc/sane.d/avision.conf
- The backend configuration file (see also description of
SANE_CONFIG_DIR below).
- /usr/lib/x86_64-linux-gnu/sane/libsane-avision.a
- The static library implementing this backend.
- /usr/lib/x86_64-linux-gnu/sane/libsane-avision.so
- The shared library implementing this backend (present on systems that
support dynamic loading).
- SANE_CONFIG_DIR
- This environment variable specifies the list of directories that may
contain the configuration file. Under UNIX, the directories are separated
by a colon (`:'), under OS/2, they are separated by a semi-colon (`;'). If
this variable is not set, the configuration file is searched in two
default directories: first, the current working directory (".")
and then in /etc/sane.d. If the value of the environment variable ends
with the directory separator character, then the default directories are
searched after the explicitly specified directories. For example, setting
SANE_CONFIG_DIR to "/tmp/config:" would result in
directories "tmp/config", ".", and
"/etc/sane.d" being searched (in this order).
- SANE_DEBUG_AVISION
- If the library was compiled with debug support enabled, this environment
variable controls the debug level for this backend. Higher debug levels
increase the verbosity of the output. The debug level 7 is the author's
preferred value to debug backend problems.
Example: export SANE_DEBUG_AVISION=7
René Rebe and Meino Christian Cramer