sane-stv680(5)           SANE Scanner Access Now Easy           sane-stv680(5)



NAME
       sane-stv680 - SANE backend for STV680 camera's

DESCRIPTION
       The sane-stv680 library implements a SANE (Scanner Access Now Easy)
       backend that provides access to some STV680 cameras. This backend
       should be considered beta-quality software! STV680 cameras are sold
       under various brands like Aiptek.  This backend may or may not support
       yours.

       The cameras that should work with this backend are:

       Vendor Model              USB vendor id  USB product id  status
       ------------------------  -------------  --------------  --------
       AIPTEK stv680                0x0553         0x0202       basic
       Konica e-mini                0x04c8         0x0722       untested
       DigitalDream l'espion XS     0x1183         0x0001       untested
       Creative WebCam Go mini      0x041e         0x4007       untested

       For all these cameras, see the backend home page (under AUTHOR) for the
       exact status of each camera.

       For startup of this backend check that if present the stv680 kernel
       module is removed or disabled.
       Also before using, enable the backend by editing the
       /etc/sane.d/dll.conf file, change #stv680 to stv680.

       For problems with the untested cameras, you should contact the author
       for that.

       The options the backend supports can either be selected through command
       line options to programs like scanimage or through GUI elements in
       xcam. For both programs use the -B option needed for size buffer.

       Some frontends examples:
       xcam
              xcam -B

       scanimage: for writing in batch mode to a file or to a new file each
       time.
              scanimage -B -d stv680:libusb:001:002 --batch=out.ppm --batch-
              count 5 --mode "Color RGB"
              scanimage -B -d stv680:libusb:001:002 --batch=out%d.ppm --batch-
              count 5 --mode "Color RGB"

       If you have any success with a camera 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 stv680



       Scan Mode


       --mode selects the basic mode of operation of the webcams valid
              choices.

              The read resolution mode is 8 bits, output resolution is 24
              bits.  Selects the resolution for a scan.  The camera can do
              only the resolutions listed.

       --Raw  In this mode raw data is displayed

       --Color
              In this mode the bayer unshuffle is done but no color correction

       --Color_RGB
              Bayer unshuffle, color correction

       --Color_RGB_TXT
              Bayer unshuffle, color correction, textline with date and time
              is added



       Enhancement options


       --white-level-r
              Selects what red radiance level should be considered "white",
              when scanning some sheets by changing the calibration value
              loaded into the scanner. Scale -32 .. 0 .. +32 in steps of 1.


       --white-level-g
              Selects what green radiance level should be considered "white",
              when scanning some sheets by changing the calibration i value
              loaded into the scanner. Scale -32 .. 0 .. +32 in steps of 1.


       --white-level-b
              Selects what blue radiance level should be considered "white",
              when scanning some sheets by changing the calibration value
              loaded into the scanner. Scale -32 .. 0 .. +32 in steps of 1.


CONFIGURATION FILE
       The configuration file /etc/sane.d/stv680.conf supports only one
       information: the device name to use (eg usb 0x.... 0x....).



FILES
       /usr/local/lib/sane/libsane-stv680.a
              The static library implementing this backend.

       /usr/local/lib/sane/libsane-stv680.so
              The shared library implementing this backend (present on systems
              that support dynamic loading).



ENVIRONMENT
       SANE_DEBUG_STV680
              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 webcam can support.



BUGS
       Plenty. Parts of this backend are still under development.
              1. Some untested cameras.
              2. Video streaming slow and stops sometimes (scanimage).
              3. Sometimes 1/3 of image is NOK (xcam).



SEE ALSO
       sane-usb(5), scanimage(1), xcam(1), sane(7)



AUTHORS
       Gerard Klaver http://gkall.hobby.nl/stv680-aiptek.html




CREDITS
       Thanks to developers of the other stv680 programs:
              STV680 kernel module
              pencam2 program
              libghoto2 program (camlib stv0680)




                                  11 Jul 2008                   sane-stv680(5)
