Provided by: libsane-common_1.2.1-5_all 
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(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 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. 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 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/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)