Provided by: libsane_1.0.19-23ubuntu7_i386 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/sane/libsane-teco2.a
              The static library implementing this backend.

       /usr/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
              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).