Ubuntu Manpage: zbarimg - scan and decode bar codes from image file(s)

NAME

       zbarimg - scan and decode bar codes from image file(s)

SYNOPSIS

       zbarimg [-qv] [--polygon] [--quiet] [--verbose[=n]]
               {-dD | --display | --nodisplay | --xml | --noxml | -S[symbology.]config[=value] |
               --set [symbology.]config[=value] | image...}

       zbarimg {-h | --help | --version}

DESCRIPTION

       For each specified image file zbarimg scans the image for bar codes and prints any decoded
       data to stdout. Images may optionally be displayed to the screen.

       The underlying library currently supports EAN-13 (including UPC and ISBN subsets), EAN-8,
       DataBar, DataBar Expanded, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5 and QR
       Code symbologies. The specific type of each detected symbol is printed with the decoded
       data.

       Note that "image" in this context refers to any format supported by ImageMagick, including
       many vector formats such as PDF and PostScript. Keep in mind that vector formats are
       rasterized before scanning; manually rasterize vector images before scanning to avoid
       unintentionally corrupting embedded barcode bitmaps.

OPTIONS

This program follows the usual GNU command line syntax. Single letter options may be
bundled, long options start with two dashes (`-').

-h, --help
Print a short help message describing command line options to standard output and exit

--version
Print program version information to standard output and exit

-v, --verbose[=n]
Increase debug output level. Multiple -v options create more spew. Alternatively
specify n to set the debug level directly

-S[symbology.]config[=value], --set [symbology.]config[=value]
Set decoder configuration option config for symbology to value. value defaults to 1
if omitted. symbology is one of ean13, ean8, upca, upce, isbn13, isbn10, i25,
codabar, code39, code93, code128, qrcode or the special value *. If symbology is
omitted or *, the config will be set for all applicable symbologies. These are the
currently recognized configs. Prefix a config with "no-" to negate it. Not all configs
are appropriate for every symbology.

enable
Control decoding/reporting of a symbology. For symbologies which are just subsets
of ean13 (upca, upce, isbn13, isbn10), this config controls whether the subsets
are detected and reported as such. These special cases are disabled by default,
all other symbologies default to enabled

disable
Antonym for enable

emit-check
Control whether check digits are included in the decoded output. Enabled by
default. This config does not apply for code128, which never returns the check
digit. It also not apply for cases where the check digit is disabled (see
add-check). Check digits are currently not implemented for i25 or code39

add-check
Enable decode and verification of a check digit for symbologies where it is
optional: this will include code39 and i25, neither of which implements the check
digit yet

ascii
Enable escape sequences that encode the full ASCII character set. This would apply
to code39, except that it's not implemented either...

position
Enable collection of symbol position information. Enabled by default. Currently,
the position information is unusable, so you can save a few cycles by disabling
this.

test-inverted
Specially for QR code images, sometimes the image is inverted, e. g. lines are
written in white instead of black. This option makes ZBar to invert the image and
parse again, in case it fails using the normal order. Enabling it affects all
decoders.

min-length=n, max-length=n
Bound the number of decoded characters in a valid symbol. If a decode result is
outside the configured min/max range (inclusive), it will not be reported. Set to
0 to disable the corresponding check. This setting applies to variable-length
symbologies: i25, codabar, code39, code128 and pdf417. min-length defaults to 6
for i25 and 1 for code39 (per Code 39 autodiscrimination recommendation); all
others default to 0

x-density=n, y-density=n
Adjust the density of the scanner passes. Lower values scan more of the image at
the cost of decreased performance. Setting to 0 disables scanning along that axis.
Defaults are both 1.

--polygon
Ouput points of the polygon containing the code bar. Using a format compatible with
The <polygon> element of the Scalable Vector Graphics (SVG) markup language

-q, --quiet
Quiet operation; only output decoded symbol data. specifically this disables the
statistics line printed (to stderr) before exiting, as well as the warning message
printed (also to stderr) when no barcodes are found in an image

-d, --display, -D, --nodisplay
Enable/disable display of subsequent image files, until next --display or --nodisplay
is encountered. This option may appear multiple times to enable display of specific
images. Image display is disabled by default

--xml, --noxml
Enable/disable result output using an XML format. This format wraps the raw data from
the symbol with information about the scan (such as page indices) in an easy to parse
format. The latest schema is available from
http://zbar.sourceforge.net/2008/barcode.xsd.

--raw
Enable raw symbol data output. This format prints symbol data separated by newlines
without the additional symbology type information that is printed by default

EXAMPLES

       Scan a PNG image of a UPC bar code symbol and pass resulting data to a script that
       searches for the code in a database and does something useful with it:

           zbarimg product.png | upcrpc.py

       The upcrpc.py example script included in the examples/ subdirectory of the distribution
       will make an XMLRPC call to a popular internet UPC database and print the product
       description if found.

       Scan a JPEG image containing several barcodes and display the image in a window, also
       disabling recognition of Interleaved 2 of 5 codes to prevent confusion with other
       symbologies or background noise:

           zbarimg --display -Si25.disable label.jpg

       Look in a scanned document only for Code 39, using XML output format so the page numbers
       are available. To enable only Code 39, first all symbologies are disabled, then Code 39 is
       re-enabled:

           zbarimg --xml -Sdisable -Scode39.enable scan.tiff

EXIT STATUS

       zbarimg returns an exit code to indicate the status of the program execution. Current exit
       codes are:

       0
           Barcodes successfully detected in all images. Warnings may have been generated, but no
           errors.

       1
           An error occurred while processing some image(s). This includes bad arguments, I/O
           errors and image handling errors from ImageMagick.

       2
           ImageMagick fatal error.

       3
           The user quit the program before all images were scanned. Only applies when running in
           interactive mode (with --display)

       4
           No barcode was detected in one or more of the images. No other errors occurred.

BUGS

       See http://sf.net/tracker/?group_id=189236&atid=928515

AUTHOR

       Jeff Brown <spadix@users.sourceforge.net>
           Lead developer

COPYRIGHT

       Copyright © 2007-2010 Jeff Brown

       All Rights Reserved