sane-canon630u - SANE backend for the Canon 630u USB flatbed scanner
The sane-canon630u library implements a SANE (Scanner Access Now Easy)
backend that provides access to the following Canon flatbed scanners:
Color scanning is supported at 75, 150, 300, and 600 dpi, and gamma and
analog gain are adjustable.
TESTERS ARE WELCOME. Send your bug reports and comments to Nathan
The contents of the canon630u.conf file is a list of device names that
correspond to Canon USB scanners. Empty lines and lines starting with
a hash mark (#) are ignored. Only one device name can be listed in
canon630u.conf. The program sane-find-scanner helps to find out the
correct device. Under Linux, such a device name could be
/dev/usb/scanner0 for example. See sane-usb(5) for details.
This product-specific scanner driver uses the lower-level kernel USB
driver "scanner". Check for "Driver=usbscanner" under
/proc/bus/usb/devices. If "Driver=(none)", try forcing it with "insmod
scanner vendor=0x04a9 product=0x2204"
Due to Canon’s unwillingness to provide scanner documentation, this
software was developed by analyzing the USB traffic of the Windows 2000
driver. So things like the calibration procedure I kind of made up; it
seems to work for my scanner. If you have complaints, let me know.
This driver requires the ability to send USB Control Messages,
available in kernel 2.4.12 or later.
Some users have reported that this driver doesn’t work at all. This
seems to be a hardware specific issue, although I don’t know what
exactly the problem is. If you are having problems, please send me the
info in /proc/bus/usb/devices, /proc/pci, the kernel scanner.c driver
version from /var/log/messages, and the output from
"SANE_DEBUG_CANON630U=12 scanimage > /dev/null"
The backend configuration file (see also description of
The static library implementing this backend.
The shared library implementing this backend (present on systems
that support dynamic loading).
The calibration file used to normalize pixel brightness. This
is calculated every time the scanner is first used after it has
lost power. Deleting this file will force recalibration.
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).
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.
SANE_DEBUG_CANON630U=12 scanimage > /dev/null
sane(7), sane-usb(5), sane-find-scanner(1)
11 Jul 2008 sane-canon630u(5)