Provided by: libsane_1.0.22-2ubuntu2_i386 bug

NAME

       sane-epson - SANE backend for EPSON scanners

DESCRIPTION

       The  sane-epson  library  implements  a  SANE (Scanner Access Now Easy)
       backend that provides access to Epson flatbed scanners.  Some functions
       of  this  backend  should  be  considered  beta-quality  software! Most
       functions have  been  stable  for  a  long  time,  but  of  course  new
       development can not and often times will not function properly from the
       very first day. Please report any strange behavior to the maintainer of
       the backend.

       At present, the following scanners are known to work with this backend:

              Model:                       Connection Type
              ---------------------------  -------------------
              GT-5000                      SCSI, parallel
              GT-6000                      parallel
              GT-6500                      SCSI (use only the line "scsi" in epson.conf)
              ActionScanner II             SCSI, parallel
              GT-7000                      SCSI
              Perfection 636               SCSI
              Perfection 636U              USB
              Perfection 610               USB
              Perfection 640               USB
              Perfection 1200S             SCSI
              Perfection 1200U             USB
              Perfection 1240              USB, SCSI
              Perfection 1640              USB, SCSI
              Perfection 1650              USB
              Perfection 1660              USB
              Perfection 2400              USB
              Perfection 2450              USB, IEEE-1394
              Expression 636 / GT-9500     SCSI
              Expression 1600              USB, SCSI, IEEE-1394
              Expression 1680              USB, SCSI, IEEE-1394
              CX-3200                      USB
              CX-5200                      USB
              and many more. The official list is on the Sane web site.

       For other scanners the software  may or may not work.  Please send mail
       to the backend author (khk@khk.net) to report success with scanners not
       on the list or problems with scanners that are listed.

OPTIONS

       The options the backend supports can either be selected through command
       line options to programs like scanimage  or  through  GUI  elements  in
       programs like xscanimage or xsane.

       Valid command line options and their syntax can be listed by using
              scanimage --help -d epson
       Not all devices support all options.

       Scan Mode
              The  --mode  switch  selects  the basic mode of operation of the
              scanner. Valid choices are Binary, Gray and Color.   The  Binary
              mode  is  black  and white only, Gray will produce 256 levels of
              gray or more depending on the scanner and  Color  means  24  bit
              color mode or more depending on the scanner.  Some scanners will
              internally use 36 bit color, their  external  interface  however
              may only support 24 bits.

              The  --depth  option selects the bit depth the scanner is using.
              This option is only available for  scanners  that  support  more
              than  one  bit  depth.  Older  scanners will always transfer the
              image in 8bit mode. Newer scanners  allow  to  select  either  8
              bits,  12  or  14  bits per color channel. For a color scan this
              means an effective color depth of 36 or 42 bits over  all  three
              channels. The valid choices depend on the scanner model.

              The  --halftoning switch selects the mode that is used in Binary
              mode. Valid  options  are  "None",  "Halftone  A  (Hard  Tone)",
              "Halftone  B  (Soft Tone)", "Halftone C (Net Screen)", "Dither A
              (4x4 Bayer)", "Dither  B  (4x4  Spiral)",  "Dither  C  (4x4  Net
              Screen)",   "Dither   D   (8x4   Net  Screen)",  "Text  Enhanced
              Technology", "Download pattern A", and "Download pattern B".

              The --dropout switch selects the so called dropout  color.  Vald
              options  are None, Red, Green and Blue. The default is None. The
              dropout color is used for monochrome scanning  and  selects  the
              color  that  is  not  scanned.  This can be used to e.g. scan an
              original with a colored background.

              The --brightness switch controls the  brightness  of  the  scan.
              Valid options are integer values from -3 to 3. The default is 0.
              The larger the brightness value, the brighter the image gets. If
              a  user  defined table for the gamma correction is selected, the
              brightness parameter is not available.

              The --sharpness switch sets the sharpness  of  the  image  data.
              Valid  options  are integer values from -2 to 2, with -2 meaning
              "Defocus",  -1  "Defocus  slightly",  0  "Normal",  1   "Sharpen
              slightly" and 2 "Sharpen".

              The  --gamma-correction  switch  controls the scanner's internal
              gamma correction. Valid options are "Default",  "User  defined",
              "High   density  printing"  "Low  density  printing"  and  "High
              contrast printing".

              The --color-correction switch controls  the  scanner's  internal
              color  correction  function.  Valid options are "No Correction",
              "Impact-dot printers", "Thermal  printers",  "Ink-jet  printers"
              and "CRT monitors". The default is "CRT monitors".

              The  --resolution switch selects the resolution for a scan. Some
              EPSON scanners will scan in any resolution  between  the  lowest
              and highest possible value. The list reported by the scanner can
              be  displayed  using  the  "--help  -d  epson"   parameters   to
              scanimage.

              The  --mirror  option  controls the way the image is scanned. By
              reading the image data from right to left the image is mirrored.
              Valid options are "yes" and "no". The default is "no".

              The  --speed  option  can  improve  the scan speed in monochrome
              mode. Valid options are "yes" or "no",  the  "yes"  option  will
              speed up the scan if this option is supported.

              The --auto-area-segmentation switch activates the automatic area
              segmentation for monochrome  scans.  The  scanner  will  try  to
              determine  which  areas  are  text and which contain images. The
              image areas will be halftoned, and the text  will  be  improved.
              Valid options are "yes" and "no". The default is "yes".

              The  --gamma-table  parameter  can  be  used  to download a user
              defined gamma table. The option takes 256 values from the  range
              0-255. In color mode this option equally affects the red, green,
              and blue channel.

              The --red-gamma-table parameter can be used to download  a  user
              defined  gamma  table for the red channel. The valid options are
              the same as for --gamma-table.

              The --green-gamma-table parameter can be used to download a user
              defined gamma table for the green channel. The valid options are
              the same as for --gamma-table.

              The --blue-gamma-table parameter can be used to download a  user
              defined  gamma table for the blue channel. The valid options are
              the same as for --gamma-table.

              The color correction coefficients --cct-1  --cct-2  --cct-3  ...
              --cct-9  will install color correction coefficients for the user
              defined color correction. Values are specified  as  integers  in
              the range -127..127.

              The  --preview  option  requests  a  preview  scan. The frontend
              software automatically selects a low resolution.  Valid  options
              are "yes" and "no". The default is "no".

              The --preview-speed options will increase the scan speed if this
              is supported by the scanner. Valid options are "yes"  and  "no",
              the default is "no".

              The  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.

              The --quick-format option lets the user select a scan area  with
              predefined  sizes. Valid parameters are "CD", "A5 portrait", "A5
              landscape", "Letter", "A4" and  "max".  The  default  is  "max",
              which selects the largest possible area.

              The  --source  option  selects  the  scan  source. Valid options
              depend on the installed options. The default is "Flatbed".

              The --auto-eject option will eject a page  after  scanning  from
              the document feeder.

              The  --film-type option will select the film type for scans with
              the transparency unit. This option is only activated if the  TPU
              is  selected  as  scan source. Valid options are "Negative Film"
              and "Positive Film".

              The --focus-position option selects the focus position  for  all
              scans. Valid options are "Focus 2.5mm above glass" and "Focus on
              glass". The  focus  on  the  2.5mm  point  above  the  glass  is
              necessary  for  scans  with  the  transparency unit, so that the
              scanner can focus on the film if one  of  the  film  holders  is
              used.  This option is only functional for selected scanners, all
              other scanners will ignore this option.

CONFIGURATION FILE

       The configuration file /etc/sane.d/epson.conf specifies  the  device(s)
       that the backend will use. Possible connection types are:

       SCSI   This  is  the  default,  and  if  nothing  else is specified the
              backend software will open a given path  as  SCSI  device.  More
              information  about valid syntax for SCSI devices can be found in
              sane-scsi(5).
              Usually SCSI scanners are configured with a line "scsi EPSON" in
              this  file.  In  some  cases it may be necessary to only use the
              string "scsi" (e.g. for the GT-6500).

       PIO - Parallel Interface
              The parallel interface can be configured in two ways: An integer
              value starting at the beginning of a line will be interpreted as
              the IO address of the parallel port. To make it clearer  that  a
              configured IO address is a parallel port the port address can be
              preceded by the string "PIO". The PIO connection does not use  a
              special device file in the /dev directory. The IO address can be
              specified in hex mode (prefixed with "0x").

       USB    A device file that is preceded by the string "USB" is treated as
              a  scanner  connected  via the Universal Serial Bus. The correct
              special device file has to be created prior  to  using  it  with
              Sane.  See  the USB documentation for more information about how
              to set up the USB subsystem and the required device files.

FILES

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

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

ENVIRONMENT

       SANE_DEBUG_EPSON
              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_DEBUG_EPSON_SCSI
              If the library was compiled with  debug  support  enabled,  this
              environment  variable  controls the SCSI related debug level for
              this backend.  Only a value of 2 is supported.

       SANE_EPSON_CMD_LVL
              This allows to override the function or command level  that  the
              backend uses to communicate with the scanner. The function level
              a scanner supports is determined during  the  initialization  of
              the device. If the backend does not recognize the function level
              reported by the scanner it will default to  function  level  B3.
              Valid  function  levels  are A1, A2, B1, B2, B3, B4, B5, B6, B7,
              B8, D1 and F5. Use this feature only if you know  what  you  are
              doing!

SEE ALSO

       sane-scsi(5), scanimage(1), xscanimage(1), xsane(1)

BUGS

       None :-) At least none are currently known.

UNSUPPORTED DEVICES

       The  backend  may  be  used with Epson scanners that are not yet listed
       under the list of supported devices. A scanner that is  not  recognized
       may  default  to  the  function  level  B3,  which  means  that not all
       functions that the scanner may be capable of are accessible.

       If the scanner is not even recognized  as  an  Epson  scanner  this  is
       probably  because the device name reported by the scanner is not in the
       correct format. Please send this information to the backend  maintainer
       (email  address  is  in  the  AUTHOR section of this man page or in the
       AUTHORS file of the SANE distribution).

       The Perfection 600, Perfection 650, Perfection 660, Perfection 1250 and
       Perfection 1260 are not supported by this backend.

AUTHOR

       The  package is actively maintained by Karl Heinz Kremer (khk@khk.net).
       The software is based on work by Christian Bucher and Kazuhiro Sasayama

                                  11 Jul 2008                    sane-epson(5)