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



NAME
       sane-cardscan - SANE backend for Corex CardScan usb scanners


DESCRIPTION
       The sane-cardscan library implements a SANE (Scanner Access Now Easy)
       backend which provides access to the Corex CardScan 800c & 600c small-
       format scanners.

       The backend supports only grayscale and color modes and media of
       (theoretically) infinite length.

       This backend may support other scanners. The best way to determine
       level of support is to get a trace of the windows driver in action, and
       send it to the author.


OPTIONS
       The cardscan backend supports the following options:

       mode m
              Selects the mode for the scan. Options are "Gray" and "Color".

CONFIGURATION FILE
       The configuration file "cardscan.conf" is used to tell the backend how
       to look for scanners, and provide options controlling the operation of
       the backend.  This file is read each time the frontend asks the backend
       for a list of scanners, generally only when the frontend starts. If the
       configuration file is missing, the backend will use a set of compiled
       defaults, which are identical to the default configuration file shipped
       with SANE.

       Scanners can be specified in the configuration file in 2 ways:

       "usb 0x04c5 0x1042" (or other vendor/product ids)
              Requests backend to search all usb busses in the system for a
              device which uses that vendor and product id. The device will
              then be queried to determine if it is a cardscan scanner.

       "usb /dev/usb/scanner0" (or other device file)
              Some systems use a kernel driver to access usb scanners. This
              method is untested.

       Additionally, there are two configuration options that control the
       protocol used by the backend:


       "lines_per_block 16" (or other number from 1 to 32)
              Controls the number of lines of image data which will be aquired
              in each pass.  Older scanners will require this number set
              lower, often 1.

       "has_cal_buffer 1" (1 or 0)
              Causes the backend to get calibration data from scanner during
              initialization.  Older scanners do not support this request, and
              must be set to 0.


ENVIRONMENT
       The backend uses a single environment variable, SANE_DEBUG_CARDSCAN,
       which enables debugging output to stderr. Valid values are:

              5  Errors
              10 Function trace
              15 Function detail
              20 Option commands
              25 SCSI/USB trace
              30 SCSI/USB detail
              35 Useless noise


KNOWN ISSUES
              The scanner does not seem to have much control possible, so the
              backend cannot set x/y coordinate values, resolutions, etc.
              These things could be simulated in the backend, but there are
              plenty of command line tools.
              The backend also does not send all the commands that the windows
              driver does, so it may not function the same.
              The backend does not have the calibration or ejection options of
              the windows driver.


CREDITS
       The hardware to build this driver was provided to the author by:
         Jeff Kowalczyk <jtk a t yahoo d o t com>


SEE ALSO
       sane(7), sane-usb(5)


AUTHOR
       m. allan noah: <kitno455 a t gmail d o t com>




                                  10 Feb 2010                 sane-cardscan(5)
