sane-canon630u(5)        SANE Scanner Access Now Easy        sane-canon630u(5)

       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:

              CanoScan 630u
              CanoScan 636u

       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
       Rutman <>

       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
              SANE_CONFIG_DIR below).

              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
              /usr/local/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 "/usr/local/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)

       Nathan Rutman

sane-backends 1.0.17              06 Apr 2002                sane-canon630u(5)