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scanadf(1)									       scanadf(1)

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|--ver-
       sion] [-o|--output-file name] [-N|--no-overwrite] [-S|--scan-script name]  [--script-wait]
       [-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 scanner with an automatic document feeder  (ADF)).
       The device is controlled via command-line options.  After command-line processing, scanadf
       normally proceeds to acquire a series of images until the  device  returns  the	SANE_STA-
       TUS_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 formats 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 (speci-
       fied by the --scanscript option) which is invoked for each acquired image.  The script  is
       provided  with  a series of environment 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 generate 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 -N or --no-overwrite option prevents scanadf from overwriting existing image files.

       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

       If the --scipt-wait option is given, scanadf will wait until all  scan-scripts  have  been
       finished  before exiting. That will be useful if scanadf is used in conjunction with tools
       to modify the scanned images.

       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 writing 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 unrecognized 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 Mosberger, 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@lists.alioth.debian.org.

       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 scanners) will likely result in repeated scans of the same doc-
       ument.  In this case, it is essential to use the start-count and end-count to control  the
       number of images acquired.

       Only  a	subset of the SANE backends support feeders and return SANE_STATUS_NO_DOCS appro-
       priately.  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 specified (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.

					   30 Oct 2004				       scanadf(1)
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