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) back-
end 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 re-
port 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 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 ef-
fective 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 Technol-
ogy", "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 orig-
inal 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 deter-
mine which areas are text and which contain images. The image ar-
eas will be halftoned, and the text will be improved. Valid op-
tions are "yes" and "no". The default is "yes".
The --gamma-table parameter can be used to download a user de-
fined 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 soft-
ware 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 se-
lects the width and -y the height of the scan area. All parame-
ters 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 fo-
cus 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/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 en-
vironment 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 en-
vironment 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 do-
ing!
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 un-
der 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 proba-
bly because the device name reported by the scanner is not in the cor-
rect format. Please send this information to the backend maintainer
(email address is in the AUTHOR section of this man page or in the AU-
THORS 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)
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