kopia lustrzana https://gitlab.com/sane-project/backends
87 wiersze
2.8 KiB
Groff
87 wiersze
2.8 KiB
Groff
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.TH sane-canon 5 "27 July 2000"
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.IX sane-canon
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.SH NAME
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sane-canon - SANE backend for Canon flatbed 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 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 2700F
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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>.
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.PP
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.SH TIPS
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.PP
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When scanning either slides or negatives, I found that I must set the
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gamma value to something about 2.2 to 2.4 (I set the same value for all
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three red, green, blue). Also, for slides, using "Auto Exposure" helps
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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 after "Auto Focus", the image I get is often a bit too
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blurred. I found that using the GIMP to do a
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"Filter->Enhance->Sharpen" at about 40 to 60 improves the image
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quite a bit. In fact, I find it so good that I might implement a
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sharpen filter into the backend in the future.
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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. You can scan
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at any other resolution, but you will notice that the image has
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noticeably more jaggies that when using one of the "native"
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resolutions.
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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
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.br
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Man page by Henning Meier-Geinitz (mostly based on canon.README)
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