Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
ZBar::Processor(3)    User Contributed Perl Documentation   ZBar::Processor(3)

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

       zbarimg(1), zbarcam(1)

       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.

perl v5.32.0			  2009-10-23		    ZBar::Processor(3)

NAME | SYNOPSIS | DESCRIPTION | REFERENCE | SEE ALSO | AUTHOR | COPYRIGHT AND LICENSE

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=Barcode::ZBar::Processor&sektion=3&manpath=FreeBSD+12.2-RELEASE+and+Ports>

home | help