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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 or through GUI elements in
       xscanimage, xsane, quiteinsane or kooka.

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

       Valid command line options and their syntax can be listed by using
	      scanimage --help -d teco2

       Scan Mode

       --mode selects the basic mode of operation of the scanner valid choices
	      are Lineart , Gray and Color 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
	      Lineart  and Gray selects the resolution for a scan. The scanner
	      can do all resolutions between 1 and 600, in increments of 1.

	      Color selects the resolution for a scan. The scanner can do only
	      the resolutions listed.

	      All  values  with	 ydpi  >  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 imagemagick command: convert -geome‐
	      try (dpi/max_xdpi * 100%)x100% max_xdpi is for the  vm3575  con‐
	      stant  with  300	dpi e.g. 600dpi adjust with: convert -geometry
	      200%x100%

       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).

       --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.

       --white-level-r
	      (VM3564,	VM356A, VM3575 and VM6575 only) Selects what red radi‐
	      ance level should be  considered	"white",  when	scanning  some
	      sheets  by  changing the calibration value loaded into the scan‐
	      ner. Scale 0..64 in steps of 1.

       --white-level-g
	      (VM3564, VM356A, VM3575 and  VM6575  only)  Selects  what	 green
	      radiance	level should be considered "white", when scanning some
	      sheets by changing the calibration i value loaded into the scan‐
	      ner. Scale 0..64 in steps of 1.

       --white-level-b
	      (VM3564, VM356A, VM3575 and VM6575 only) Selects what blue radi‐
	      ance level should be  considered	"white",  when	scanning  some
	      sheets  by  changing the calibration value loaded into the scan‐
	      ner. Scale 0..64 in steps of 1.

       --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 max‐
	      imum allowed.  The scan mode is user selected.  The  default  is
	      "no".

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

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

       /usr/lib/arch_triplet/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
	      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.

       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.
       However they are only software adjustments. This	 backend  only	imple‐
       ments what the scanner can support.

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

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

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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