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 -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).