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

NAME
       sane-pieusb - SANE backend for USB-connected PIE PowerSlide and Reflecta
       DigitDia/CrystalScan/ProScan slide scanners

DESCRIPTION
       The  sane-pieusb  library  implements  a  SANE (Scanner Access Now Easy)
       backend that provides access to USB-connected  PIE  and  Reflecta  slide
       scanners.
       At present, the following scanners should work with this backend:

       Model:                    Status
       ------------------------- ------
       PIE PowerSlide 3600       Untested
       PIE PowerSlide 3650       Untested
       PIE PowerSlide 4000       Untested
       PIE PowerSlide 5000       Untested
       Reflecta CrystalScan 7200 Untested
       Reflecta ProScan 4000     Untested
       Reflecta ProScan 7200     Untested
       Reflecta DigitDia 3600    Untested
       Reflecta DigitDia 4000    Untested
       Reflecta DigitDia 5000    Untested
       Reflecta DigitDia 6000    Ok

MULTIPLE SLIDES
       Support for multiple slide scanners (like the PowerSlide or DigitDia se-
       ries)  is done by auto-advancing ('Advance slide' setting) the slide af-
       ter each scan.

       However, for best results, it is recommended to do a preview  for  every
       slide since this sets gamma, brightness, and contrast to optimal values.

       Attention:  SANE does not have an automatic landscape/portrait detection
       and re-orientation when scanning multiple slides. You have  to  put  all
       slides into one orientation first !

DIRT REMOVAL
       If available, sane-pieusb supports infrared scans for dirt detection and
       removal. This must be enabled via the 'Clean image' setting.

KNOWN PROBLEMS
       The sane-pieusb backend supports dirt removal based on infrared scan in-
       formation.  Since  SANE does not provide post-processing in the backend,
       sane-pieusb does the scanning and dirt removal during the  setup  phase.
       The  'scan'  phase is only used to transfer the completed image.  There-
       fore sane-pieusb does not multi-thread making a typical frontend  appear
       as 'blocked'. Also cancel requests are only honored between scans.

ENVIRONMENT
       SANE_DEBUG_PIEUSB
              If  the library was compiled with debug support enabled, this en-
              vironment variable controls the debug  level  for  this  backend.
              E.g.,  a  value  of  128 requests all debug output to be printed.
              Smaller levels reduce verbosity.

              level   debug output
              ------- ------------------------------
               0       nothing
               1       errors
               2       warnings & minor errors
               5       additional information
               7       SANE api calls
               9       backend functions
              11       scanner functions
              13       usb functions
              15       image buffer functions

FILES
       /etc/sane.d/pieusb.conf
              The backend configuration file

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

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

SEE ALSO
       sane(7)

CONTACT AND BUG-REPORTS
       Please send any information and bug-reports to:
       Klaus Kämpf <kkaempf@suse.com>

AUTHORS
       The  pieusb  backend is based on work by Jan Vleeshouwers, Michael Rick-
       mann, and Klaus Kämpf

                                  10 Aug 2015                    sane-pieusb(5)

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