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+.TH sane\-pieusb 5 "10 Aug 2015" "@PACKAGEVERSION@" "SANE Scanner Access Now Easy"
+.IX sane\-pieusb
+.SH NAME
+sane\-pieusb \- SANE backend for USB-connected PIE PowerSlide and
+Reflecta DigitDia/CrystalScan/ProScan slide scanners
+
+.SH DESCRIPTION
+The
+.B sane\-pieusb
+library implements a SANE (Scanner Access Now Easy) backend that
+provides access to USB-connected PIE and Reflecta slide scanners.
+.br
+At present, the following scanners should work with this backend:
+.PP
+.ft CR
+.nf
+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
+.fi
+.ft R
+.PP
+
+.SH "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 !
+
+.SH "DIRT REMOVAL"
+If available, pieusb supports infrared scans for dirt detection and
+removal. This must be enabled via the 'Clean image' setting.
+
+.SH "KNOWN PROBLEMS"
+The pieusb backend supports dirt removal based on infrared scan
+information. Since SANE does not provide post-processing in the
+backend, pieusb does the scanning and dirt removal during the setup
+phase. The 'scan' phase is only used to transfer the completed image.
+Therefore pieusb does not multi-thread making a typical frontend
+appear as 'blocked'. Also cancel requests are only honored between
+scans.
+
+.SH "ENVIRONMENT"
+.TP
+.B 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.
+
+.PP
+.RS
+.ft CR
+.nf
+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
+.fi
+.ft R
+.RE
+.PP
+
+.SH FILES
+.TP
+.I @CONFIGDIR@/pieusb.conf
+The backend configuration file
+.TP
+.I @LIBDIR@/libsane\-pieusb.a
+The static library implementing this backend.
+.TP
+.I @LIBDIR@/libsane\-pieusb.so
+The shared library implementing this backend (present on systems that
+support dynamic loading).
+.PP
+
+.SH SEE ALSO
+sane(7)
+
+.SH "CONTACT AND BUG-REPORTS"
+Please send any information and bug-reports to:
+.br
+.B Klaus Kämpf <kkaempf@suse.com>
+
+.SH AUTHORS
+The pieusb backend is based on work by Jan Vleeshouwers, Michael
+Rickmann, and Klaus Kämpf