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 scan-
       ners:

	      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/lib64/sane/libsane-canon630u.a
	      The static library implementing this backend.

       /usr/lib64/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	configura-
	      tion  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 explic-
	      itly  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)