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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 Rut-
       man <>

       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/scan-
       ner0 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,	avail-
       able 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 ex-
       actly 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_DE-
       BUG_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 config-
	      uration  file is searched	in two default directories: first, the
	      current  working	directory   (".")   and	  then	 in   /usr/lo-
	      cal/etc/sane.d.	If  the	value of the environment variable ends
	      with the directory separator character, then the default	direc-
	      tories  are searched after the explicitly	specified directories.
	      For example, setting SANE_CONFIG_DIR to "/tmp/config:" would re-
	      sult   in	  directories	"tmp/config",	".",   and   "/usr/lo-
	      cal/etc/sane.d" being searched (in this order).

	      If the library was compiled with debug support enabled, this en-
	      vironment	 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

				  11 Jul 2008		     sane-canon630u(5)


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