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 series) is done by
       auto-advancing ('Advance slide' setting) the slide after 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 information. 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.  Therefore 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 environment 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 Rickmann, and Klaus Kämpf

                                           10 Aug 2015                             sane-pieusb(5)