NAME¶
scanimage - scan an image
SYNOPSIS¶
scanimage [ -d | --device-name dev ] [ --format
format ] [ -i | --icc-profile profile ] [ -L |
--list-devices ] [ -f | --formatted-device-list format ]
[ --batch [= format ]] [ --batch-start start ]
[ --batch-count count ] [ --batch-increment increment
] [ --batch-double ] [ --accept-md5-only ] [ -p |
--progress ] [ -n | --dont-scan ] [ -T | --test ] [ -h |
--help ] [ -v | --verbose ] [ -B | --buffersize ] [ -V |
--version ] [ device-specific-options ]
DESCRIPTION¶
scanimage is a command-line interface to control image acquisition
devices such as flatbed scanners or cameras. The device is controlled via
command-line options. After command-line processing,
scanimage normally
proceeds to acquire an image. The image data is written to standard output in
one of the PNM (portable aNyMaP) formats (PBM for black-and-white images, PGM
for grayscale images, and PPM for color images) or in TIFF (black-and-white,
grayscale or color).
scanimage accesses image acquisition devices
through the
SANE (Scanner Access Now Easy) interface and can thus
support any device for which there exists a
SANE backend (try
apropos sane- to get a list of available backends).
EXAMPLES¶
To get a list of devices:
scanimage -L
To scan with default settings to the file image.pnm:
scanimage >image.pnm
To scan 100x100 mm to the file image.tiff (-x and -y may not be available with
all devices):
scanimage -x 100 -y 100 --format=tiff >image.tiff
To print all available options:
scanimage -h
OPTIONS¶
Parameters are separated by a blank from single-character options (e.g. -d
epson) and by a "=" from multi-character options (e.g.
--device-name=epson).
The
-d or
--device-name options must be followed by a
SANE
device-name like
` epson:/dev/sg0 ' or
` hp:/dev/usbscanner0 '.
A (partial) list of available devices can be obtained with the
--list-devices option (see below). If no device-name is specified
explicitly,
scanimage reads a device-name from the environment variable
SANE_DEFAULT_DEVICE . If this variable is not set,
scanimage
will attempt to open the first available device.
The
--format format option selects how image data is written to
standard output.
format can be
pnm or
tiff. If
--format is not used, PNM is written.
The
-i or
--icc-profile option is used to include an ICC profile
into a TIFF file.
The
-L or
--list-devices option requests a (partial) list of
devices that are available. The list is not complete since some devices may be
available, but are not listed in any of the configuration files (which are
typically stored in directory
/caehome/ra28145/etc/sane.d ). This is
particularly the case when accessing scanners through the network. If a device
is not listed in a configuration file, the only way to access it is by its
full device name. You may need to consult your system administrator to find
out the names of such devices.
The
-f or
--formatted-device-list option works similar to
--list-devices , but requires a format string.
scanimage
replaces the placeholders
%d %v
%m %t %i with the device name,
vendor name, model name, scanner type and an index number respectively. The
command
- scanimage -f \*(lq scanner number
%i device %d is a %t, model
%m, produced by %v \*(rq
will produce something like:
- scanner number 0 device sharp:/dev/sg1 is a flatbed
scanner, model JX250 SCSI, produced by SHARP
The
--batch* options provide the features for scanning documents using
document feeders.
--batch [ format ] is used to specify the
format of the filename that each page will be written to. Each page is written
out to a single file. If
format is not specified, the default of
out%d.pnm (or out%d.tif for --format tiff) will be used.
format is
given as a printf style string with one integer parameter.
--batch-start start selects the page number to start naming
files with. If this option is not given, the counter will start at 0.
--batch-count count specifies the number of pages to attempt to
scan. If not given, scanimage will continue scanning until the scanner returns
a state other than OK. Not all scanners with document feeders signal when the
ADF is empty, use this command to work around them. With
--batch-increment increment you can change the amount that the
number in the filename is incremented by. Generally this is used when you are
scanning double-sided documents on a single-sided document feeder. A specific
command is provided to aid this:
--batch-double will automatically set
the increment to 2.
--batch-prompt will ask for pressing RETURN before
scanning a page. This can be used for scanning multiple pages without an
automatic document feeder.
The
--accept-md5-only option only accepts user authorization requests
that support MD5 security. The
SANE network daemon
( saned ) is
capable of doing such requests. See
saned (8).
The
-p or
--progress option requests that
scanimage prints
a progress counter. It shows how much image data of the current image has
already been received by
scanimage (in percent).
The
-n or
--dont-scan option requests that
scanimage only
sets the options provided by the user but doesn't actually perform a scan.
This option can be used to e.g. turn off the scanner's lamp (if supported by
the backend).
The
-T or
--test option requests that
scanimage performs a
few simple sanity tests to make sure the backend works as defined by the
SANE API (in particular the
sane_read function is exercised by
this test).
The
-h or
--help options request help information. The information
is printed on standard output and in this case, no attempt will be made to
acquire an image.
The
-v or
--verbose options increase the verbosity of the
operation of
scanimage. The option may be specified repeatedly, each
time increasing the verbosity level.
The
-B or
--buffersize option changes the input buffersize that
scanimage uses from default 32*1024 to 1024*1024 kbytes.
The
-V or
--version option requests that
scanimage prints
the program and package name, the version number of the
SANE
distribution that it came with and the version of the backend that it loads.
Usually that's the dll backend. If more information about the version numbers
of the backends are necessary, the
DEBUG variable for the dll backend
can be used. Example: SANE_DEBUG_DLL=3 scanimage -L.
As you might imagine, much of the power of
scanimage comes from the fact
that it can control any
SANE backend. Thus, the exact set of
command-line options depends on the capabilities of the selected device. To
see the options for a device named
dev , invoke
scanimage via a
command-line of the form:
- scanimage --help --device-name dev
The documentation for the device-specific options printed by
--help is
best explained with a few examples:
-l 0..218mm [0]
Top-left x position of scan area.
- The description above shows that option -l expects
an option value in the range from 0 to 218 mm. The value in square brackets
indicates that the current option value is 0 mm. Most backends provide
similar geometry options for top-left y position (-t), width (-x) and height
of scan-area (-y).
--brightness -100..100% [0]
Controls the brightness of the acquired image.
- The description above shows that option --brightness
expects an option value in the range from -100 to 100 percent. The value in
square brackets indicates that the current option value is 0 percent.
--default-enhancements
Set default values for enhancement controls.
- The description above shows that option
--default-enhancements has no option value. It should be thought of
as having an immediate effect at the point of the command-line at which it
appears. For example, since this option resets the --brightness
option, the option-pair --brightness 50 --default-enhancements would
effectively be a no-op.
--mode Lineart|Gray|Color [Gray]
Selects the scan mode (e.g., lineart or color).
- The description above shows that option --mode
accepts an argument that must be one of the strings Lineart , Gray
, or Color . The value in the square bracket indicates that the
option is currently set to Gray . For convenience, it is legal to
abbreviate the string values as long as they remain unique. Also, the case
of the spelling doesn't matter. For example, option setting --mode
col is identical to "--mode Color" .
--custom-gamma[=(yes|no)] [inactive]
Determines whether a builtin or a custom gamma-table
should be used.
- The description above shows that option
--custom-gamma expects either no option value, a "yes"
string, or a "no" string. Specifying the option with no value is
equivalent to specifying "yes". The value in square-brackets
indicates that the option is not currently active. That is, attempting to
set the option would result in an error message. The set of available
options typically depends on the settings of other options. For example, the
--custom-gamma table might be active only when a grayscale or color
scan-mode has been requested.
Note that the
--help option is processed only after all other options
have been processed. This makes it possible to see the option settings for a
particular mode by specifying the appropriate mode-options along with the
--help option. For example, the command-line:
scanimage --help --mode color
would print the option settings that are in effect when the color-mode is
selected.
--gamma-table 0..255,...
Gamma-correction table. In color mode this option
equally affects the red, green, and blue channels
simultaneously (i.e., it is an intensity gamma table).
- The description above shows that option
--gamma-table expects zero or more values in the range 0 to 255. For
example, a legal value for this option would be
"3,4,5,6,7,8,9,10,11,12". Since it's cumbersome to specify long
vectors in this form, the same can be expressed by the abbreviated form
"[0]3-[9]12". What this means is that the first vector element is
set to 3, the 9-th element is set to 12 and the values in between are
interpolated linearly. Of course, it is possible to specify multiple such
linear segments. For example, "[0]3-[2]3-[6]7,[7]10-[9]6" is
equivalent to "3,3,3,4,5,6,7,10,8,6". The program
gamma4scanimage can be used to generate such gamma tables (see
gamma4scanimage (1) for details).
--filename <string> [/tmp/input.ppm]
The filename of the image to be loaded.
- The description above is an example of an option that takes
an arbitrary string value (which happens to be a filename). Again, the value
in brackets show that the option is current set to the filename
/tmp/input.ppm .
ENVIRONMENT¶
- SANE_DEFAULT_DEVICE
- The default device-name.
FILES¶
- /caehome/ra28145/etc/sane.d
- This directory holds various configuration files. For
details, please refer to the manual pages listed below.
- ~/.sane/pass
- This file contains lines of the form
- user:password:resource
- scanimage uses this information to answer user
authorization requests automatically. The file must have 0600 permissions
or stricter. You should use this file in conjunction with the
--accept-md5-only option to avoid server-side attacks. The resource may
contain any character but is limited to 127 characters.
SEE ALSO¶
sane (7), gamma4scanimage (1), xscanimage (1),
xcam(1) , xsane(1) ,
scanadf (1), sane-dll (5), sane-net (5),
sane-"backendname" (5)
AUTHOR¶
Transliterated from the C original by Jeffrey Ratcliffe.
BUGS¶
All the bugs of scanimage and much, much more.