Provided by: libsane_1.0.20-4ubuntu3_i386 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/sane/libsane-epson2.a
              The static library implementing this backend.

       /usr/lib/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)