NAME

Barcode::ZBar - Perl interface to the ZBar Barcode Reader

SYNOPSIS

setup:

            

              
              
use Barcode::ZBar;
my $reader = Barcode::ZBar::Processor->new();
$reader->init();
$reader->set_data_handler(\&my_handler);
            
          

scan an image:

            

              
              
my $image = Barcode::ZBar::Image->new();
$image->set_format('422P');
$image->set_size(114, 80);
$image->set_data($raw_bits);
$reader->process_image($image);
            
          

scan from video:

            

              
              
$reader->set_visible();
$reader->set_active();
$reader->user_wait();
            
          

collect results:

            

              
              
my @symbols = $image->get_symbols();
foreach my $sym (@symbols) {
    print("decoded: " . $sym->get_type() . ":" . $sym->get_data());
}
            
          

DESCRIPTION

The ZBar Bar Code Reader is a library for scanning and decoding bar codes from various sources such as video streams, image files or raw intensity sensors. It supports EAN-13/UPC-A, UPC-E, EAN-8, Code 128, Code 93, Code 39, Codabar, Interleaved 2 of 5 and QR Code.

These are the bindings for interacting directly with the library from Perl.

REFERENCE

Functions

version()

Returns the version of the zbar library as "major.minor".

increase_verbosity()

Increases global library debug by one level.

set_verbosity(level)

Sets global library debug to the indicated level. Higher numbers give more verbosity.

parse_config(configstr)

Parse a decoder configuration setting into a list containing the symbology constant, config constant, and value to set. See the documentation for zbarcam/zbarimg for available configuration options.

Constants

Width stream "color" constants:

SPACE

Light area or space between bars.

BAR

Dark area or colored bar segment.

Decoder configuration constants:

Config::ENABLE

Config::ADD_CHECK

Config::EMIT_CHECK

Config::ASCII

Config::MIN_LEN

Config::MAX_LEN

Config::POSITION

Config::X_DENSITY

Config::Y_DENSITY

Symbology modifier constants:

Modifier::GS1

Modifier::AIM

Symbol orientation constants:

Orient::UNKNOWN

Orient::UP

Orient::RIGHT

Orient::DOWN

Orient::LEFT

SEE ALSO

Barcode::ZBar::Processor, Barcode::ZBar::ImageScanner, Barcode::ZBar::Image, Barcode::ZBar::Symbol, Barcode::ZBar::Scanner, Barcode::ZBar::Decoder

zbarimg(1), zbarcam(1)

http://zbar.sf.net

AUTHOR

Jeff Brown, <spadix@users.sourceforge.net>

COPYRIGHT AND LICENSE

Copyright 2008-2010 (c) Jeff Brown <spadix@users.sourceforge.net>

The ZBar Bar Code Reader is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

cpanm Barcode::ZBar

perl -MCPAN -e shell
install Barcode::ZBar