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barcode::zbar::processor(3pm) [debian man page]

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 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 v5.14.2							    2009-10-23						      ZBar::Processor(3pm)

Check Out this Related Man Page

Barcode::Code39(3pm)					User Contributed Perl Documentation				      Barcode::Code39(3pm)

NAME

       GD::Barcode::Code39 - Create Code39 barcode image with GD

SYNOPSIS

       ex. CGI

	 use GD::Barcode::Code39;
	 binmode(STDOUT);
	 print "Content-Type: image/png

";
	 print GD::Barcode::Code39->new('*CODE39IMG*')->plot->png;

       with Error Check

	 my $oGdBar = GD::Barcode::Code39->new('*123456789;*');
	 die $GD::Barcode::Code39::errStr unless($oGdBar);     #Invalid Characters

DESCRIPTION

       GD::Barcode::Code39 is a subclass of GD::Barcode and allows you to create CODE-39 barcode image with GD.  This module based on "Generate
       Barcode Ver 1.02 By Shisei Hanai 97/08/22".

   new
       $oGdBar = GD::Barcode::Code39->new($sTxt);

       Constructor.  Creates a GD::Barcode::Code39 object for $sTxt.

   plot()
       $oGd = $oGdBar->plot([Height => $iHeight, NoText => 0 | 1]);

       creates GD object with barcode image for the $sTxt specified at new method.  $iHeight is height of the image. If NoText is 1, the image has
       no text image of $sTxt.

	ex.
	 my $oGdB = GD::Barcode::Code39->new('*12345*');
	 my $oGD = $oGdB->plot(NoText=>1, Height => 20);
	 # $sGD is a GD image with Height=>20 pixels, with no text.

   barcode()
       $sPtn = $oGdBar->barcode();

       returns a barcode pattern in string with '1' and '0'.  '1' means black, '0' means white.

	ex.
	 my $oGdB = GD::Barcode::Code39->new('*12345*');
	 my $sPtn = $oGdB->barcode();
	 # $sPtn = '';

   $errStr
       $GD::Barcode::Code39::errStr

       has error message.

   $text
       $oGdBar->{text}

       has barcode text based on $sTxt specified in new method.

AUTHOR

       Kawai Takanori GCD00051@nifty.ne.jp

COPYRIGHT

       The GD::Barocde::Code39 module is Copyright (c) 2000 Kawai Takanori. Japan.  All rights reserved.

       You may distribute under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file.

SEE ALSO

       GD::Barcode

perl v5.12.3							    2003-05-29						      Barcode::Code39(3pm)
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