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
avilable widget interfaces for GUI applications.
REFERENCE
- Methods
- new()
Create a new bar code reader instance.
- init([video_device], [enable_display])
Open a video input device and/or prepare to display output.
- set_data_handler([handler], [closure])
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. - is_visible()
set_visible([visible])Test/set visibility of the output window. - set_active([active])
Enable/disable video streaming and scanning for bar codes.
- get_results()
Return a list of Barcode::ZBar::Symbol results from the last
scanned image or video frame. - user_wait([timeout])
Wait for the user to press a key/button or close the window. Bar
codes will continue to be processed if video is active. - process_one([timeout])
Enable video and scan until at least one barcode is found. Note
that multiple results may still be returned. - process_image([image])
Scan a Barcode::ZBar::Image for bar codes.
- parse_config(configstr)
Apply a decoder configuration setting. See the documentation for
"zbarcam"/"zbarimg" for available configuration options. - request_size(width, height)
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
http://zbar.sf.net
AUTHOR
Jeff Brown, <spadix@users.sourceforge.net>
COPYRIGHT AND LICENSE
Copyright 2008-2009 (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.