Provided by: libsane-common_1.0.22-7ubuntu1_amd64 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  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 -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%

       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 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
              (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 scanner. Scale 0..64 in steps of 1.

       --white-level-b
              (VM3564, VM356A, VM3575 and VM6575 only) 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.

       --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".

CONFIGURATION FILE

       The  configuration  file  /etc/sane.d/teco2.conf supports only one information: 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 implements 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)