Provided by: libsane-common_1.0.22-7ubuntu1_amd64 bug

NAME

       sane-epson2 - SANE backend for EPSON scanners

DESCRIPTION

       The  sane-epson2 library implements a SANE (Scanner Access Now Easy) backend that provides
       access to Epson flatbed scanners.  This library supports a similar set of scanners as  the
       sane-epson  driver  but  was  developed  to  support  a  wider range of connections to the
       scanner; include network access.

       Because sane-epson and sane-epson2 drivers support many of the same devices, if one driver
       gives  you  problems  you  may  try  disabling  it  to try the other.  This can be done by
       removing the driver name from the dll.conf or perhaps by commenting  out  the  options  in
       epson.conf or epson2.conf.

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

              Model:                       Connection Type
              ---------------------------  -------------------
              ActionScanner II             SCSI, parallel
              AcuLaser CX11 Series         USB, Network
              AcuLaser CX21 Series         USB, Network
              CX-3200                      USB
              CX-3600                      USB
              CX-3650                      USB
              CX-4050                      USB
              CX-4600                      USB
              CX-4800                      USB
              CX-5000                      USB
              CX-5200                      USB
              CX-5400                      USB
              CX-6300                      USB
              CX-6400                      USB
              CX-6500                      USB
              CX-6600                      USB
              DX-3800                      USB
              DX-5000                      USB
              DX-5050                      USB
              DX-6000                      USB
              DX-7400                      USB
              ES-300C                      SCSI, parallel
              ES-300GS                     SCSI
              ES-600C                      parallel
              ES-1200C                     parallel
              Expression 636               SCSI
              Expression 800               SCSI
              Expression 1600              USB, SCSI, IEEE-1394
              Expression 1680              USB, SCSI, IEEE-1394
              FilmScan 200                 SCSI
              GT-5000                      SCSI, parallel
              GT-5500                      SCSI
              GT-6000                      parallel
              GT-6500                      parallel
              GT-7000                      SCSI
              GT-8000                      SCSI
              GT-8500                      SCSI
              Perfection 610               USB
              Perfection 636S              SCSI
              Perfection 636U              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
              Perfection 3200              USB
              Perfection 4870              USB
              Perfection 4990              USB
              RX-425                       USB
              RX-500                       USB
              RX-600                       USB
              RX-700                       USB
              V700                         USB, IEEE-1394
              V750                         USB, IEEE-1394
              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 sane-
       backend mailing list 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 epson2
       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 --threshold switch selects the minimum brightness to get a white point.

              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 --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  --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 --wait-for-button parameter can be used to wait until the button on the scanner
              is pressed to actually start the scan process.

              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 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 --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 --bay option selects which bay to scan

              The --eject option ejects the sheet in the ADF.

              The --adf-mode option selecst the ADF mode (simplex/duplex).

CONFIGURATION FILE

       The  configuration  file  /etc/sane.d/epson2.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    For USB scanners not automatically detect, their  VENDOR  and  PRODUCT  ID  can  be
              specified manually in the config file.  More information about valid syntax for USB
              devices can be found in sane-usb(5).

       Network
              Network scanners can be auto-discovered if autodiscovery  is  specified  after  net
              keyword.  An IP address to connect to can also be used.

FILES

       /usr/lib/arch_triplet/sane/libsane-epson2.a
              The static library implementing this backend.

       /usr/lib/arch_triplet/sane/libsane-epson2.so
              The  shared  library  implementing  this  backend  (present on systems that support
              dynamic loading).

ENVIRONMENT

       SANE_DEBUG_EPSON2
              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_EPSON2_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_DEBUG_EPSON2_NET
              If the library was compiled with debug support enabled, this  environment  variable
              controls  the  network  related debug level for this backend.  E.g., a value of 128
              requests all debug output to be printed.  Smaller levels reduce verbosity.

       SANE_EPSON2_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), sane-usb(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).

AUTHOR

       The package is written by Alessandro Zummo and is based on  previous  work  done  by  Karl
       Hienz  Kremer  in  the  epson  package  as  well  as based on work by Christian Bucher and
       Kazuhiro Sasayama

                                           22 Jan 2009                             sane-epson2(5)