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) back-
end that provides access to the following Canon flatbed and film scan-
ners:
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 operat-
ing 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 un-
likely) 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 in-
tensities; 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 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
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)
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