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<H1>scanadf.1</H1>
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<B><A HREF="scanadf.1.html">scanadf(1)</A></B> <B><A HREF="scanadf.1.html">scanadf(1)</A></B>
</PRE>
<H2>NAME</H2><PRE>
scanadf - acquire multiple images from a scanner equipped with an ADF
</PRE>
<H2>SYNOPSIS</H2><PRE>
<B>scanadf</B> [<B>-d</B>|<B>--device-name</B> <I>dev</I>] [<B>-h</B>|<B>--help</B>] [<B>-L</B>|<B>--list-devices</B>]
[<B>-v</B>|<B>--verbose</B>] [<B>-V</B>|<B>--version</B>] [<B>-o</B>|<B>--output-file</B> <I>name</I>] [<B>-S</B>|<B>--scan-script</B>
<I>name</I>] [<B>-s</B>|<B>--start-count</B> <I>num</I>] [<B>-e</B>|<B>--end-count</B> <I>num</I>] [<B>-r</B>|<B>--raw</B>] [<I>device-</I>
<I>specific-options</I>]
</PRE>
<H2>DESCRIPTION</H2><PRE>
<B>scanadf</B> is a command-line interface to control image acquisition
devices which are capable of returning a series of images (e.g. a scan-
ner with an automatic document feeder (ADF)). The device is controlled
via command-line options. After command-line processing, <B>scanadf</B> nor-
mally proceeds to acquire a series of images until the device returns
the <B>SANE_STATUS_NO_DOCS</B> status code.
The images are written to output files, specified by the <B>--output-file</B>
option. These files are typically written in one of the PNM (portable
aNyMaP) formats (PBM for black-and-white images, PGM for grayscale
images, and PPM for color images). Several optional frame formats
(SANE_FRAME_JPEG, SANE_FRAME_G31D, SANE_FRAME_G32D, SANE_FRAME_G42D,
and SANE_FRAME_TEXT) are supported. In each case, the data is written
out to the output file as-is without a header. Unrecognized frame for-
mats are handled in the same way, although a warning message is printed
in verbose mode.
Typically, the optional frame formats are used in conjunction with a
scan script (specified by the <B>--scanscript</B> option) which is invoked for
each acquired image. The script is provided with a series of environ-
ment variables which describe the parameters and format of the image
file.
<B>scanadf</B> 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).
</PRE>
<H2>OPTIONS</H2><PRE>
The <B>-d</B> or <B>--device-name</B> options must be followed by a SANE device-name.
A (partial) list of available devices can be obtained with the <B>--list-</B>
<B>devices</B> option (see below). If no device-name is specified explicitly,
<B>scanadf</B> will attempt to open the first available device.
The <B>-h</B> or <B>--help</B> 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 <B>-L</B> or <B>--list-devices</B> 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 /usr/local/etc/sane.d). This is par-
ticularly 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 admin-
istrator to find out the names of such devices.
The <B>-v</B> or <B>--verbose</B> options increase the verbosity of the operation of
<B>scanadf.</B> The option may be specified repeatedly, each time increasing
the verbosity level.
The <B>-V</B> or <B>--version</B> option requests that <B>scanadf</B> print the program and
package name, as well as the version number of the SANE distribution
that it came with.
The <B>-o</B> or <B>--output-file</B> option specifies a format string used to gener-
ate the name of file to write the image data to. You can use %d
replacement in the output file name; this will be replaced with the
current page number. The default format string is image-%04d.
The <B>-S</B> or <B>--scan-script</B> option specifies the name of script to run
after each scanned image is acquired. The script receives the name of
the image output file as its first and only command line argument.
Additionally the scan script can reference the following environment
variables to get information about the parameters of the image.
<B>SCAN_RES</B> - the image resolution (in DPI)
<B>SCAN_WIDTH</B> - the image width (in pixels)
<B>SCAN_HEIGHT</B> - the image height (in pixels)
<B>SCAN_DEPTH</B> - the image bit-depth (in bits)
<B>SCAN_FORMAT</B> - a string representing the image format (e.g. gray,
g42d, text, etc)
<B>SCAN_FORMAT_ID</B> - the numeric image format identifier
The <B>-s</B> or <B>--start-count</B> option specifies the page number of first
scanned image.
The <B>-e</B> or <B>--end-count</B> option specifies the last page number to scan.
Using this option, you can request a specific number of pages to be
scanned, rather than scanning until there are no more images available.
The <B>-r</B> or <B>--raw</B> option specifies that the raw image data be written to
the output file as-is without interpretation. This disables the writ-
ing of the PNM header for basic frame types. This feature is usually
used in conjunction with the <B>--scan-script</B> option where the scan script
uses the environment variables to understand the format and parameters
of the image and converts the file to a more useful format. NOTE: With
support for the optional frame types and the default handling of unrec-
ognized frametypes, this option becomes less and less useful.
As you might imagine, much of the power of <B>scanadf</B> 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 <I>dev</I>, invoke <B>scanadf</B> via a command-
line of the form:
scanadf --help --device <I>dev</I>
The documentation for the device-specific options printed by <B>--help</B> is
explained in the manual page for <B>scanimage.</B>
</PRE>
<H2>FILES</H2><PRE>
<I>/usr/local/etc/sane.d</I>
This directory holds various configuration files. For details,
please refer to the manual pages listed below.
</PRE>
<H2>SEE ALSO</H2><PRE>
<B><A HREF="scanimage.1.html">scanimage(1)</A></B>, <B><A HREF="xscanimage.1.html">xscanimage(1)</A></B>, <B><A HREF="sane.7.html">sane(7)</A></B>
</PRE>
<H2>AUTHOR</H2><PRE>
scanadf is an adaptation by Tom Martone of scanimage by David Mos-
berger, Andreas Beck, and Gordon Matzigkeit following closely the
features of bnhscan by Sean Reifschneider of tummy.com, ltd.
</PRE>
<H2>BUGS</H2><PRE>
Please send reports to <I>sane-devel@lists.alioth.debian.org</I>.
This program relies on the backend to return the <B>SANE_STATUS_NO_DOCS</B>
status code when the automatic document feeder is out of paper. Use of
this program with backends that do not support ADFs (e.g. flatbed scan-
ners) will likely result in repeated scans of the same document. In
this case, it is essential to use the start-count and end-count to con-
trol the number of images acquired.
Only a subset of the SANE backends support feeders and return SANE_STA-
TUS_NO_DOCS appropriately. Backends which are known to work at this
time are:
<B>sane-bh</B> - Bell+Howell Copiscan II series scanners.
<B>sane-hp</B> - Hewlett Packard scanners. A patch to the sane-hp
backend is necessary. The --scantype=ADF option must be speci-
fied (earlier versions of the backend used the --scan-from-adf
option, instead).
<B>sane-umax</B> - UMAX scanners. Support exists in build 12 and
later. The --source="Automatic Document Feeder" option must be
specified.
15 Sep 1999 <B><A HREF="scanadf.1.html">scanadf(1)</A></B>
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