NAME

       sane-teco3 - SANE backend for TECO / RELISYS scanners

DESCRIPTION

       The  sane-teco3  library implements a SANE (Scanner Access Now Easy) backend that provides access to some
       TECO SCSI flatbed scanners. This backend should be considered alpha-quality software! TECO  scanners  are
       sold under various brands like RELYSIS, PIOTECH, TRUST. This backend may or may not support yours.

       The scanners that should work with this backend are:

                Vendor Model                 TECO model   status
                ---------------------------  ----------  ----------
                Relisys Scorpio                VM3552     tested
                Plustek OpticPro 2400SP        VM3552     untested
                PIOTECH Splendeur 3024         VM3552     tested
                Trust Imagery 2400 SP          VM3552     tested
                Trust Imagery 4800 SP+         VM3552     tested
                Trust Imagery 9600 SP          VM3552     untested

       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 or xsane.

       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 teco3

       Scan Mode

       --mode selects the basic mode of operation of the scanner valid choices are Black & White , Grayscale and
              Color The Black & White mode is black and white only (1 bit). Grayscale will produce 256 levels of
              gray (8 bits). Color will produce a 24 bits color image.

       --resolution
              selects  the  resolution  for  a  scan.  The scanner can do all resolutions between 1 and 1200, in
              increments of 1.

       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
              (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 1024 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 1024 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 1024 bytes long.

       --preview
              requests a preview scan. The resolution used for that scan is 22 dpi and  the  scan  area  is  the
              maximum allowed. The scan mode is user selected. The default is "no".

CONFIGURATION FILE

       The  configuration  file @CONFIGDIR@/teco3.conf supports only one information: the device name to use (eg
       /dev/scanner).

FILES

       @LIBDIR@/libsane-teco3.a
              The static library implementing this backend.

       @LIBDIR@/libsane-teco3.so
              The shared library implementing this backend (present on systems that support dynamic loading).

ENVIRONMENT

       SANE_DEBUG_TECO3
              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.

LIMITATIONS

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

BUGS

       Not much.

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/#teco3

@PACKAGEVERSION@                                   14 Jul 2008                                     sane-teco3(5)