sane-epson

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

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

   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 ex
          ternal 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 pat‐
          tern 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 scanimage(1).

          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 im
          ages. 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  de
          fault 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 se
          lected 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/x86_64-linux-gnu/sane/libsane-epson.a
          The static library implementing this backend.

   /usr/lib/x86_64-linux-gnu/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 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!

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)