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

AUTHOR

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

COPYRIGHT AND LICENSE

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.