diff options
Diffstat (limited to 'perl/ZBar/Image.pod')
-rw-r--r-- | perl/ZBar/Image.pod | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/perl/ZBar/Image.pod b/perl/ZBar/Image.pod new file mode 100644 index 0000000..6848bdd --- /dev/null +++ b/perl/ZBar/Image.pod @@ -0,0 +1,145 @@ +#------------------------------------------------------------------------ +# Copyright 2008-2009 (c) Jeff Brown <spadix@users.sourceforge.net> +# +# This file is part of the ZBar Bar Code Reader. +# +# 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. +# +# The ZBar Bar Code Reader is distributed in the hope that it will be +# useful, but WITHOUT ANY WARRANTY; without even the implied warranty +# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Lesser Public License for more details. +# +# You should have received a copy of the GNU Lesser Public License +# along with the ZBar Bar Code Reader; if not, write to the Free +# Software Foundation, Inc., 51 Franklin St, Fifth Floor, +# Boston, MA 02110-1301 USA +# +# http://sourceforge.net/projects/zbar +#------------------------------------------------------------------------ + +=pod + +=head1 NAME + +Barcode::ZBar::Image - image object to scan for bar codes + +=head1 SYNOPSIS + + use Barcode::ZBar; + + my $image = Barcode::ZBar::Image->new(); + $image->set_format('422P'); + $image->set_size(114, 80); + $image->set_data($raw_bits); + + my @symbols = $image->get_symbols(); + +=head1 DESCRIPTION + +Barcode::ZBar::Image is used to pass images to the bar code scanner. +It wraps raw image data with the meta-data required to interpret it +(size, pixel format, etc) + +=head2 Image Formats + +Image data formats are represented by (relatively) standard "Four +Character Codes" (fourcc), represented by four character strings in +Perl. A list of supported formats is available on the project wiki. + +Examples: + +=over 2 + +=item * + +'GREY' - single 8bpp intensity plane + +=item * + +'BGR3' - 24bpp packed RGB component format + +=item * + +'YUYV' - 12bpp packed luminance/chrominance (YCbCr) format + +=back + +=head1 REFERENCE + +=head2 Methods + +=over 4 + +=item new() + +Create a new Barcode::ZBar::Image object. The size, pixel format and +data must be defined before the object may be used. + +=item get_format() + +=item set_format(I<format>) + +Return/specify the fourcc code corresponding to the image pixel format. + +=item get_sequence() + +=item set_sequence(I<seq_num>) + +Return/specify the video frame or page number associated with the image. + +=item get_size() + +=item set_size(I<width>, I<height>) + +Return/specify the (I<width>, I<height>) image size tuple. + +=item get_data() + +=item set_data(I<raw>) + +Return/specify the raw image data as a binary string. + +=item get_symbols() + +Return a list of scanned Barcode::ZBar::Symbol results attached to +this image. + +=item convert_resize(I<format>, I<width>, I<height>) + +=item convert(I<format>) + +Return a new Barcode::ZBar::Image object converted to the indicated +fourcc format. Returns C<undef> if the conversion is not supported. +Conversion complexity ranges from CPU intensive to trivial depending +on the formats involved. Note that only a few conversions retain +color information. convert actually calls convert_resize using the +source width and height. + +=back + +=head1 SEE ALSO + +Barcode::ZBar, Barcode::ZBar::Image, Barcode::ZBar::Symbol + +zbarimg(1), zbarcam(1) + +http://zbar.sf.net + +=head1 AUTHOR + +Jeff Brown, E<lt>spadix@users.sourceforge.netE<gt> + +=head1 COPYRIGHT AND LICENSE + +Copyright 2008-2010 (c) Jeff Brown E<lt>spadix@users.sourceforge.netE<gt> + +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. + +=cut |