NAME
    scanadf - acquire multiple images from a scanner equipped with an ADF

SYNOPSIS
    scanadf  [-d|--device-name  dev]  [-h|--help]  [-L|--list-devices]
    [-v|--verbose] [-V|--version] [-o|--output-file name] [-S|--scan-script
    name] [-s|--start-count  num] [-e|--end-count num] [-r|--raw] [device-
    specific-options]

DESCRIPTION
    scanadf 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, scanadf nor-
    mally proceeds to acquire a series of images until the device returns
    the SANE_STATUS_NO_DOCS status code.

    The images are written to output files, specified by the --output-file
    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 --scanscript 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.

    scanadf 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).

OPTIONS
    The -d or --device-name options must be followed by a SANE device-name.
    A (partial) list of available devices can be obtained with the --list-
    devices option (see below). If no device-name is specified explicitly,
    scanadf will attempt to open the first available device.

    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 -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 /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 -v or --verbose options increase the verbosity of the operation of
    scanadf.  The option may be specified repeatedly, each time increasing
    the verbosity level.

    The -V or --version option requests that scanadf print the program and
    package name, as well as the version number of the SANE distribution
    that it came with.

    The -o or --output-file 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 -S or --scan-script 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.

    SCAN_RES - the image resolution (in DPI)
    SCAN_WIDTH - the image width (in pixels)
    SCAN_HEIGHT - the image height (in pixels)
    SCAN_DEPTH - the image bit-depth (in bits)
    SCAN_FORMAT - a string representing the image format (e.g. gray,
    g42d, text, etc)
    SCAN_FORMAT_ID - the numeric image format identifier

    The -s or --start-count option specifies the page number of  first
    scanned image.

    The -e or --end-count 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 -r or --raw 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 --scan-script 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 scanadf 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 scanadf via a command-
    line of the form:

    scanadf --help --device dev

    The documentation for the device-specific options printed by --help is
    explained in the manual page for scanimage.

FILES
    /etc/sane.d
    This directory holds various configuration files.  For details,
    please refer to the manual pages listed below.

SEE ALSO
   scanimage(1), xscanimage(1), sane(7)

AUTHOR
    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.

BUGS
    Please send reports to sane-devel@mostang.com

    This program relies on the backend to return the SANE_STATUS_NO_DOCS
    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:

    sane-bh - Bell+Howell Copiscan II series scanners.
    sane-hp - 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).
    sane-umax  - UMAX scanners.  Support exists in build 12 and
    later. The --source="Automatic Document Feeder" option must be
    specified.