NAME
sane-avision - SANE backend for original Avision and Avision OEM
scanners (HP, Minolta, Mitsubishi, UMAX and possibly more) flatbed and
film scanners.
ABOUT THIS FILE
This file is a short descripton for the avision-backend shipped with
SANE.
DESCRIPTION
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!
CONFIGURATION
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 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!
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.
DEVICE NAMES
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.
FILES
/etc/sane.d/avision.conf
The backend configuration file (see also description of
SANE_CONFIG_DIR below).
/usr/lib/sane/libsane-avision.a
The static library implementing this backend.
/usr/lib/sane/libsane-avision.so
The shared library implementing this backend (present on systems
that support dynamic loading).
ENVIRONMENT
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 prefered value to debug backend
problems.
Example: export SANE_DEBUG_AVISION=7
SEE ALSO
sane(7), sane-scsi(5), sane-usb(5)
http://www.exactcode.de/oss/avision/
AUTHOR
René Rebe and Meino Christian Cramer
11 Jul 2008 sane-avision(5)