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

       sane-canon - SANE backend for Canon SCSI	scanners

       The  sane-canon	library	 implements  a	SANE (Scanner Access Now Easy)
       backend that provides access to the following Canon  flatbed  and  film

	      CanoScan 300
	      CanoScan 600
	      CanoScan FB620S
	      CanoScan FB1200S
	      CanoScan FS2700F
	      CanoScan FS2710S

       Parallel	 port  and USB scanners	are not	supported by this backend; see
       the manual pages	for sane-canon_pp(5) and sane-canon630u(5) for further

       IMPORTANT: This is beta code. We	tested the code	on the scanners	listed
       above, using the	computers and operating	systems	available to  us,  but
       we cannot guarantee that	the backend will work smoothly with future op-
       erating systems,	SCSI adapters, SANE frontend programs, or Canon	 scan-
       ners not	contained in the list above. In	some cases your	computer might
       even hang.  It cannot be	excluded (although we  consider	 it  extremely
       unlikely) that your scanner will	be damaged.

       That  said,  TESTERS ARE	WELCOME. Send your bug reports and comments to
       Manuel Panea _mpd@rzg.mpg.de_; for questions concerning the  FB620  and
       FB1200S	contact	 Mitsuru  Okaniwa, for the
       FS2710S Ulrich Deiters _ukd@xenon.pc.uni-koeln.de_.

TIPS (FS2700F)
       Scanning	either slides or negatives has been found  to  require	rather
       large gamma corrections of about	2.2 to 2.4 (same value for red,	green,
       and blue). It is	recommended to use the automatic exposure controls  of
       the frontend xsane(1) for best results.

       The  "Auto Focus" function triggers a special pass to determine the fo-
       cus value. After	that, the real scanning	pass takes place.

       Even with "Auto Focus" turned on, the scanned image is often a bit  too
       blurred.	 Using the gimp(1) to do a "Filter->Enhance->Sharpen" at about
       40 to 60	improves the image considerably.

TIPS (FS2710S)
       Gamma corrections are done not by the scanner, but by the backend.  The
       scanner	is  always  run	in 12-bit mode.	In "color" mode	the image data
       are corrected for gamma,	shadow point,  etc.,  and  then	 truncated  to
       8-bit  intensities;  the	 default gamma value is	2.0. In	"raw" mode the
       image data are exported without corrections as 16-bit intensities; this
       mode  can  be recommended if extensive adjustments have to be made to a
       picture (and if the frontend can	handle 16-bit intensities).

       Negatives are handled by	simple color inversion and may require	manual
       removal of blue discoloration.

	      The static library implementing this backend.

	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

	      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.

	      Example: export SANE_DEBUG_CANON=4

       sane-scsi(5)   (installa-
       tion of a CanoScan 2700F)

       Helmut Koeberle,	Manuel Panea, and Markus Mertinat;
       FB620S and FB1200S support by Mitsuru Okaniwa;
       FS2710S support by Ulrich Deiters
       Man page	by Henning Meier-Geinitz (mostly based on canon.README)

				  11 Jul 2008			 sane-canon(5)


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