sane-canon

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

NAME

   sane-canon - SANE backend for Canon SCSI scanners

DESCRIPTION

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

          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 information.

   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 operating systems, SCSI adapters, SANE frontend programs, or Canon scanners 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
   <m-okaniwa@bea.hi-ho.ne.jp>, 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 focus 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 will require manual removal of blue discoloration.

FILES

   /usr/lib/x86_64-linux-gnu/sane/libsane-canon.a
          The static library implementing this backend.

   /usr/lib/x86_64-linux-gnu/sane/libsane-canon.so
          The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

   SANE_DEBUG_CANON
          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: export SANE_DEBUG_CANON=4

SEE ALSO

   sane-scsi(5)
   http://www.rzg.mpg.de/~mpd/sane/doc/canon.install2700F.txt (installation of a CanoScan 2700F)

AUTHOR

   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)