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



NAME
       sane-canon630u - SANE backend for the Canon 630u USB flatbed scanner

DESCRIPTION
       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 <nthn1@yahoo.com>

CONFIGURATION
       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"

NOTES
       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"

FILES
       /etc/sane.d/canon630u.conf
              The backend configuration file (see also description of
              SANE_CONFIG_DIR below).

       /usr/local/lib/sane/libsane-canon630u.a
              The static library implementing this backend.

       /usr/local/lib/sane/libsane-canon630u.so
              The shared library implementing this backend (present on systems
              that support dynamic loading).

       /tmp/canon.cal
              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.

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_CANON630U
              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.

              Example:
              SANE_DEBUG_CANON630U=12 scanimage > /dev/null

SEE ALSO
       sane(7), sane-usb(5), sane-find-scanner(1)
       http://canon-fb630u.sourceforge.net/

AUTHOR
       Nathan Rutman




                                  11 Jul 2008                sane-canon630u(5)
