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ZBar::Processor(3pm) User Contributed Perl Documentation ZBar::Processor(3pm)

NAME

Barcode::ZBar::Processor - self-contained bar code reader

SYNOPSIS

setup:

    use Barcode::ZBar;
    
    my $reader = Barcode::ZBar::Processor->new();
    $reader->init("/dev/video1", 1);
    $reader->parse_config('code39.disable');
    $reader->set_data_handler(\&my_handler);

scan an image:

    $reader->process_image($image);

scan from video:

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

DESCRIPTION

A Barcode::ZBar::Processor may be used to quickly create stand-alone bar code scanning applications. It has interfaces to scan images or video and to optionally display a video/image preview to a window.

This interface is not well suited for integration with an existing GUI, as the library manages the optional preview window and any user interaction. Use a Barcode::ZBar::ImageScanner or Investigate the available widget interfaces for GUI applications.

REFERENCE

Methods

Create a new bar code reader instance.
Open a video input device and/or prepare to display output.
Setup a callback to process results whenever new results are available from the video stream or a static image. The specified callable will be invoked with the associated Barcode::ZBar::Processor object and closure as arguments. Closure may be achieved either using standard Perl closure or by manually passing a scalar via closure.
Test/set visibility of the output window.
Enable/disable video streaming and scanning for bar codes.
Return a list of Barcode::ZBar::Symbol results from the last scanned image or video frame.
Wait for the user to press a key/button or close the window. Bar codes will continue to be processed if video is active.
Enable video and scan until at least one barcode is found. Note that multiple results may still be returned.
Scan a Barcode::ZBar::Image for bar codes.
Apply a decoder configuration setting. See the documentation for "zbarcam"/"zbarimg" for available configuration options.
Request a preferred size for the video image from the device. The request may be adjusted or completely ignored by the driver. Must be called before "init()"

SEE ALSO

Barcode::ZBar, Barcode::ZBar::Image, Barcode::ZBar::ImageScanner

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.

2020-02-01 perl v5.30.0