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 acquired 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>

@PACKAGEVERSION@                                   10 Feb 2010                                  sane-cardscan(5)