sane-canon(5)

1sane-canon(5)            SANE Scanner Access Now Easy            sane-canon(5)
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NAME

6       sane-canon - SANE backend for Canon SCSI scanners
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DESCRIPTION

9       The  sane-canon  library  implements  a  SANE (Scanner Access Now Easy)
10       backend that provides access to the following Canon  flatbed  and  film
11       scanners:
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13              CanoScan 300
14              CanoScan 600
15              CanoScan FB620S
16              CanoScan FB1200S
17              CanoScan FS2700F
18              CanoScan FS2710S
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20       Parallel  port  and USB scanners are not supported by this backend; see
21       the manual pages  for  sane-canon_pp  and  sane-canon630u  for  further
22       information.
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24       IMPORTANT: This is beta code. We tested the code on the scanners listed
25       above, using the computers and operating systems available to  us,  but
26       we  cannot  guarantee  that  the backend will work smoothly with future
27       operating systems, SCSI adapters,  SANE  frontend  programs,  or  Canon
28       scanners  not  contained in the list above. In some cases your computer
29       might even hang.  It  cannot  be  excluded  (although  we  consider  it
30       extremely unlikely) that your scanner will be damaged.
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32       That  said,  TESTERS ARE WELCOME. Send your bug reports and comments to
33       Manuel Panea <mpd@rzg.mpg.de>; for questions concerning the  FB620  and
34       FB1200S  contact  Mitsuru  Okaniwa <m-okaniwa@bea.hi-ho.ne.jp>, for the
35       FS2710S Ulrich Deiters <ukd@xenon.pc.uni-koeln.de>.
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TIPS (FS2700F)

38       Scanning either slides or negatives has been found  to  require  rather
39       large gamma corrections of about 2.2 to 2.4 (same value for red, green,
40       and blue). It is recommended to use the automatic exposure controls  of
41       the frontend xsane for best results.
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43       The  "Auto  Focus"  function  triggers  a special pass to determine the
44       focus value. After that, the real scanning pass takes place.
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46       Even with "Auto Focus" turned on, the scanned image is often a bit  too
47       blurred.  Using the GIMP to do a "Filter->Enhance->Sharpen" at about 40
48       to 60 improves the image considerably.
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TIPS (FS2710S)

51       Gamma corrections are done not by the scanner, but by the backend.  The
52       scanner  is  always  run in 12-bit mode. In "color" mode the image data
53       are corrected for gamma, shadow point,  etc.,  and  then  truncated  to
54       8-bit  intensities;  the  default gamma value is 2.0. In "raw" mode the
55       image data are exported without corrections as 16-bit intensities; this
56       mode  can  be recommended if extensive adjustments have to be made to a
57       picture (and if the frontend can handle 16-bit intensities).
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59       Negatives are handled by simple color inversion and may require  manual
60       removal of blue discoloration.
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FILES

63       /usr/lib*/sane/libsane-canon.a
64              The static library implementing this backend.
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66       /usr/lib*/sane/libsane-canon.so
67              The shared library implementing this backend (present on systems
68              that support dynamic loading).
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ENVIRONMENT

71       SANE_DEBUG_CANON
72              If the library was compiled with  debug  support  enabled,  this
73              environment  variable controls the debug level for this backend.
74              Higher debug levels increase the verbosity of the output.
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76              Example: export SANE_DEBUG_CANON=4
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AUTHOR

85       Helmut Koeberle, Manuel Panea, and Markus Mertinat; FB620S and  FB1200S
86       support by Mitsuru Okaniwa; FS2710S support by Ulrich Deiters
87       Man page by Henning Meier-Geinitz (mostly based on canon.README)
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91sane-backends 1.0.18              03 May 2001                    sane-canon(5)