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

NAME
       sane-sceptre - SANE backend for SCEPTRE scanners

DESCRIPTION
       The  sane-sceptre  library  implements a	SANE (Scanner Access Now Easy)
       backend that provides access to Sceptre flatbed scanners. This  backend
       should  be  considered beta-quality software! Please report any strange
       behavior	to the maintainer of the backend or to the SANE	mailing	list.

       At present, only	one scanner is known to	work with this backend:

	      Model			   Connection Type
	      ---------------------------  -------------------
	      Sceptre VividScan	S1200	   SCSI

       The make	of this	scanner	is KINPO, so other scanners from that manufac-
       turer may also work (eg.	the S600).

OPTIONS
       The options the backend supports	can either be selected through command
       line options to programs	like scanimage or through GUI elements in  xs-
       canimage	or xsane.

       Valid command line options and their syntax can be listed by using
	      scanimage	--help -d sceptre

       Scan Mode

       --mode selects the basic	mode of	operation of the scanner valid choices
	      are Lineart, Halftone, Gray and Color.  The Lineart and Halftone
	      mode  are	 black	and  white only	(1 bit). Gray will produce 256
	      levels of	gray (8	bits). Color will produce a 24 bits color  im-
	      age. The scanner supports	30 bits	internally but it only exports
	      24.

       --resolution
	      selects the resolution for a scan. The scanner  can  do  several
	      resolutions between 50 and 1200.

       --halftone-pattern
	      selects  the  pattern  mode that is used in Halftone mode. Valid
	      options are 1, 2,	3 and 4.

       --gamma-correction
	      controls the scanner internal gamma  correction.	Valid  options
	      are "Default", "User defined", "High density printing" "Low den-
	      sity printing" and "High contrast	printing".

       --custom-gamma
	      (color mode only)	allows the user	to specify a gamma table  (see
	      the next 3 parameters).

       --red-gamma-table
	      (color  mode  only) can be used to download a user defined gamma
	      table for	the red	channel. The table must	be 256 bytes long.

       --green-gamma-table
	      (color mode only)	can be used to download	a user	defined	 gamma
	      table for	the green channel. The table must be 256 bytes long.

       --blue-gamma-table
	      (color  mode  only) can be used to download a user defined gamma
	      table for	the blue channel. The table must be 256	bytes long.

       --threshold
	      sets the threshold for black and white pixels in	lineart	 mode.
	      Possible values are from 0 (darker) to 255 (lighter).

       --preview
	      requests a preview scan. The resolution used for that scan is 30
	      dpi and the scan area is the maximum allowed. The	scan  mode  is
	      user selected. The default is "no".

       The geometry options

       -l -t -x	-y
	      control the scan area: -l	sets the top left x coordinate,	-t the
	      top left y coordinate, -x	selects	the width and -y the height of
	      the  scan	 area.	All parameters are specified in	millimeters by
	      default.

CONFIGURATION FILE
       The configuration file /usr/local/etc/sane.d/sceptre.conf supports only
       one information:	the device name	to use (eg /dev/scanner).

FILES
       /usr/local/lib/sane/libsane-sceptre.a
	      The static library implementing this backend.

       /usr/local/lib/sane/libsane-sceptre.so
	      The shared library implementing this backend (present on systems
	      that support dynamic loading).

ENVIRONMENT
       SANE_DEBUG_SCEPTRE
	      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.

LIMITATIONS
       Resolutions
	      The windows TWAIN	driver can be set to any resolution between 50
	      to 1200 (excluding software interpolation). This backend cannot.
	      Only a handful of	resolution are available, although they	should
	      be numerous enough.

BUGS
       None known.

SEE ALSO
       sane-scsi(5), scanimage(1), xscanimage(1), xsane(1), sane(7)

AUTHOR
       The package is actively maintained by Frank Zago.
	      http://www.zago.net/sane/#sceptre

				  11 Jul 2008		       sane-sceptre(5)

NAME | DESCRIPTION | OPTIONS | CONFIGURATION FILE | FILES | ENVIRONMENT | LIMITATIONS | BUGS | SEE ALSO | AUTHOR

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