Provided by: libsane_1.0.22-2ubuntu2_i386 bug

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

       /usr/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)