Provided by: libsane-common_1.0.22-7ubuntu1_amd64 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/arch_triplet/sane/libsane-epson.a
              The static library implementing this backend.

       /usr/lib/arch_triplet/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)