Provided by: libsane-common_1.1.1-5ubuntu1_all bug


       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 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 ( 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(1) or through GUI  elements  in  programs  like  xscanimage(1)  or

       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 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)", "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. 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 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

              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.


       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.


              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  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.

              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

              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 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.


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

                                           11 Jul 2008                              sane-epson(5)