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

       sane-epson - SANE backend for EPSON scanners

       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 func-
       tions 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  back-

       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 ( to report success with scanners not
       on the list or problems with scanners that are listed.

       The options the backend supports can either be selected through command
       line options to programs like scanimage or through GUI elements in pro-
       grams 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 im-
              age in 8bit mode. Newer scanners allow one 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)", "Half-
              tone  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", "Down-
              load pattern A", and "Download pattern B".

              The --dropout switch selects the so called dropout color.  Valid
              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 con-
              trast 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  scanim-

              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  de-
              termine 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 de-
              fined 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 soft-
              ware 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  se-
              lects  the width and -y the height of the scan area. All parame-
              ters 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 de-
              pend 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  neces-
              sary  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 scan-
              ners will ignore this option.

       The configuration file @CONFIGDIR@/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 back-
              end software will open a given path as SCSI device. More  infor-
              mation  about  valid  syntax  for  SCSI  devices can be found in
              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.

              The static library implementing this backend.

              The shared library implementing this backend (present on systems
              that support dynamic loading).

              If the library was compiled with debug support enabled, this en-
              vironment 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.

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

              This allows one 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!

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

       None :-) At least none are currently known.

       The backend may be used with Epson scanners that are not yet listed un-
       der 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 prob-
       ably because the device name reported by the scanner is not in the cor-
       rect format. Please send this information  to  the  backend  maintainer
       (email  address is in the AUTHOR section of this man page or in the AU-
       THORS file of the SANE distribution).

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

       The  package is actively maintained by Karl Heinz Kremer (
       The software is based on work by Christian Bucher and Kazuhiro Sasayama

@PACKAGEVERSION@                  11 Jul 2008                    sane-epson(5)
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