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sane-teco2(5)		  SANE Scanner Access Now Easy		   sane-teco2(5)

NAME
     sane-teco2 - SANE backend for TECO / RELISYS scanners

DESCRIPTION
     The  sane-teco2 library implements a SANE (Scanner Access Now Easy) backend
     that provides access to some  TECO  SCSI  flatbed	scanners.  This  backend
     should  be  considered  beta-quality software! TECO scanners are sold under
     various brands like Mustek, Relisys, Piotech, Primax, TRUST.  This  backend
     may or may not support yours.

     The scanners that should work with this backend are:

	       Vendor Model		  TECO model	  status
	    --------------------------- --------------	-----------
	      Mustek ScanMagic 4830S	  VM3575	 untested
	      Primax Jewel 4800 	  VM356A	 good
	      Primax Profi 9600 	  VM6575	 basic
	      Primax Profi 19200	  VM6586	 good
	      Relisys APOLLO Express 3	  VM356A	 basic
	      Relisys APOLLO Express 6	  VM6565	 good
	      Relisys APOLLO Express 12   ?		 untested
	      Relisys AVEC II S3	  VM3564	 good
	      Relisys AVEC Super 3	  VM3575	 basic
	      Relisys SCORPIO Pro	  VM6575	 good
	      Relisys SCORPIO Pro-S	  VM6586	 untested
	      Relisys SCORPIO Super 3	  VM3575	 good

     For  all  these scanners, lineart and gray mode work well. However, most of
     them do not support more than a handful of resolutions in color  mode.  See
     the backend home page (under AUTHOR) for the exact status of each scanner.

     Note  that  the untested scanner will not be directly supported. You should
     contact the author for that.

     The TECO VM number can usually be found at the back of the scanner.  It  is
     also part of the FCC ID.

     The  options  the	backend  supports can either be selected through command
     line options to programs like scanimage(1) or through GUI elements  in  xs-
     canimage(1), xsane(1), quiteinsane(1) or kooka(1).

     If  you  have  any success with a scanner not listed here, or if you notice
     any strange behavior, please report to the backend  maintainer  or  to  the
     SANE mailing list.

OPTIONS
     Valid command line options and their syntax can be listed by using:

	    scanimage --help -d teco2

     Scan Mode

     --mode Lineart|Gray|Color
	    selects  the  basic  mode  of operation of the scanner.  The Lineart
	    mode is black and white only (1 bit).  Gray mode  will  produce  256
	    levels of gray (8 bits).  Color will produce a 24 bits color image.

     --resolution 1..600
	    Selects  the  resolution  for a scan. The scanner can do all resolu-
	    tions between 1 and 600, in increments of 1, for Lineart  and  Gray.
	    For Color, a restricted set of resolutions are available.

	    Note:  All	values with vertical resolution in dpi > 300 (300 x 600)
	    or 600 (600 x 1200) result in a wrong proportion for the  scan.  The
	    proportion	can  be  adjusted  with the following convert(1) command
	    from imagemagick:
	    convert -geometry (dpi/max_xdpi * 100%)x100%
	    max_xdpi is for the vm3575 constant with 300 dpi e.g. 600dpi  adjust
	    with: convert -geometry 200%x100%

     --preview
	    requests  a  preview  scan.  The resolution used for that scan is 50
	    dpi (for VM356A and VM6575 75 dpi) and the scan area is the  maximum
	    allowed.  The scan mode is user selected. The default is "no".

     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.

     Enhancement options

     --custom-gamma (no custom gamma option for the VM3564 and VM356A)
	    (color mode only) allows the user to specify a gamma table (see  the
	    next 3 parameters).

OPTIONS FOR COLOR MODE
     These options are valid for scan mode Color only.

     --red-gamma-table
	    Can be used to download a user defined gamma table for the red chan-
	    nel. The table must be 256 bytes long.

     --green-gamma-table
	    Can  be  used  to  download a user defined gamma table for the green
	    channel. The table must be 256 bytes long.

     --blue-gamma-table
	    Can be used to download a user defined  gamma  table  for  the  blue
	    channel. The table must be 256 bytes long.

OPTIONS ONLY FOR VM3564, VM356A, VM3575 and VM6575
     These options are only available for VM3564, VM356A, VM3575 and VM6575 mod-
     els.

     --white-level-r 0..64
	    Selects  what  red radiance level should be considered "white", when
	    scanning some sheets by changing the calibration value  loaded  into
	    the scanner. Scale 0..64 in steps of 1.

     --white-level-g 0..64
	    Selects what green radiance level should be considered "white", when
	    scanning  some  sheets by changing the calibration value loaded into
	    the scanner. Scale 0..64 in steps of 1.

     --white-level-b 0..64
	    Selects what blue radiance level should be considered "white",  when
	    scanning  some  sheets by changing the calibration value loaded into
	    the scanner. Scale 0..64 in steps of 1.

CONFIGURATION FILE
     The configuration file /usr/local/etc/sane.d/teco2.conf supports  only  one
     item: the device name to use (eg /dev/scanner).

FILES
     /usr/local/lib/sane/libsane-teco2.a
	    The static library implementing this backend.

     /usr/local/lib/sane/libsane-teco2.so
	    The  shared  library  implementing	this backend (present on systems
	    that support dynamic loading).

ENVIRONMENT
     SANE_DEBUG_TECO2
	    If the library was compiled with debug support enabled,  this  envi-
	    ronment  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.

     SANE_TECO2_CAL_ALGO
	    Either 0 or 1. Selects the algorithm for the calibration. A value of
	    1 seems to give better scans on the VM356A, VM3575.  Feedback on  it
	    is	welcome.   For	VM3564,  VM356A,  VM3575, VM6575 default 1.  For
	    other supported types default 0.

LIMITATIONS
     The windows TWAIN driver has many more options than this SANE backend. How-
     ever they are only software adjustments. This backend only implements  what
     the scanner can support.

BUGS
     Plenty. Parts of this backend are still under development.

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

AUTHORS
     Frank Zago
	    http://www.zago.net/sane/#teco2

     The package is actively maintained by Gerard Klaver.
	    http://gkall.hobby.nl/teco2.html

CREDITS
     Thanks to:

     Gerard Klaver for his relentless VM3575 testings and contributed a patch to
     support the VM3564 and VM356A.

     Mark Plowman for providing the first SCSI traces from a VM3575.

     Andreas Klaedtke for providing the first SCSI traces from a VM6586 and for
     his testing, and to Stefan von Dombrowski for his testing.

     Nicolas Peyresaubes for providing the first SCSI traces from a VM656A and
     for his testing.

     Dave Parker for testing the support for the VM6575.

     Michael Hoeller for testing the support for the VM356A.

     Christoph Hoeffner for testing the support for the VM3564 (Relisys AVEC II
     S3 firmware 1.09).

				   14 Jul 2008			   sane-teco2(5)

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