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)