kopia lustrzana https://gitlab.com/sane-project/backends
105 wiersze
3.6 KiB
Groff
105 wiersze
3.6 KiB
Groff
.TH sane-canon 5 "03 May 2001" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
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.IX sane-canon
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.SH NAME
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sane-canon \- SANE backend for Canon SCSI scanners
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.SH DESCRIPTION
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The
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.B sane-canon
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library implements a SANE (Scanner Access Now Easy) backend that
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provides access to the following Canon flatbed and film scanners:
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.PP
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.RS
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CanoScan 300
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.br
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CanoScan 600
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.br
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CanoScan FB620S
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.br
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CanoScan FS2700F
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.br
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CanoScan FS2710
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.br
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.RE
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.PP
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No parallel port and USB scanners are supported and there are no plans to
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support them in the future.
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.PP
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IMPORTANT: this is alpha code. Don't expect this to work
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correctly. Many functions are missing, others contain errors. In some
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cases, your computer might even hang. It cannot be excluded (although
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I consider it extremely unprobable) that your scanner will be
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damaged.
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.PP
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That said, TESTERS ARE WELCOME. Send your bug reports and comments to
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Manuel Panea <mpd@rzg.mpg.de>; for questions concerning the FB620
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contact Mitsuru Okaniwa <m-okaniwa@bea.hi-ho.ne.jp>, for the FS2710
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Ulrich Deiters <ukd@xenon.pc.uni-koeln.de>.
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.PP
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.SH TIPS (FS2700)
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.PP
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Scanning either slides or negatives has been found to require rather
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large gamma corrections of about 2.2 to 2.4 (same value for red, green,
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and blue). Also, for slides, using "Auto Exposure" helps a lot.
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.PP
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The "Auto Exposure" function for slides makes the scanner do a first
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pass on the film to determine the Highlight and Shadow point
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values. The "Auto Focus" function triggers yet another pass to
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determine the focus value. After that, the real scanning pass takes
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place. The "Auto Exposure" function is not available for negatives yet.
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.PP
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Even with "Auto Focus" turned on, the scanned image is often a bit too
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blurred. Using the GIMP to do a "Filter->Enhance->Sharpen" at about 40
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to 60 improves the image considerably. It is likely that a sharpen filter
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will be included in a future version of this backend.
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.PP
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The "native" scanner resolutions of the 2700F are the integer
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sub-multiples of 2720 dpi, i.e. 1360, 680, 340 and 170. Scanning at
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other resolutions is possible, but there will be noticeably more jaggies
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in the image than when using one of the "native" resolutions.
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.PP
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.SH TIPS (FS2710)
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.PP
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Gamma corrections are done not by the scanner, but by the backend.
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The scanner is always run in 12-bit mode. In "color" mode the image
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data are corrected for gamma, shadow point, etc., and then truncated
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to 8-bit intensities; the default gamma value is 2.5. In "raw" mode the
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image data are exported without corrections as 16-bit intensities; this
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mode can be recommended if extensive adjustments have to be made to a
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picture (and if the frontend can handle 16-bit intensities).
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.PP
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Negatives are handled by simple color inversion and may require manual
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removal of blue discoloration.
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.PP
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.SH FILES
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.TP
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.I @LIBDIR@/libsane-canon.a
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The static library implementing this backend.
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.TP
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.I @LIBDIR@/libsane-canon.so
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The shared library implementing this backend (present on systems that
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support dynamic loading).
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.SH ENVIRONMENT
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.TP
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.B SANE_DEBUG_CANON
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If the library was compiled with debug support enabled, this
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environment variable controls the debug level for this backend. Higher
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debug levels increase the verbosity of the output.
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Example:
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export SANE_DEBUG_CANON=4
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.SH "SEE ALSO"
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sane\-scsi(5)
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.br
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http://www.rzg.mpg.de/~mpd/sane/
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.br
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doc/canon.install2700F.txt (installation of a CanoScan 2700F
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.br
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.SH AUTHOR
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Helmut Koeberle, Manuel Panea, and Markus Mertinat; FB620S support
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by Mitsuru Okaniwa; FS2710 support by Ulrich Deiters
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.br
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Man page by Henning Meier-Geinitz (mostly based on canon.README)
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