Provided by: libsane-common_1.2.1-5_all bug

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  xscanimage(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 resolutions 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 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
              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 channel. 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 models.

       --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 /etc/sane.d/teco2.conf supports only one item: the device  name  to
       use (eg /dev/scanner).

FILES

       /usr/lib/x86_64-linux-gnu/sane/libsane-teco2.a
              The static library implementing this backend.

       /usr/lib/x86_64-linux-gnu/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 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)