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zint-barcode-generator/docs/twodims.html
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<TITLE>Two-Dimensional Symbols</TITLE>
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<P ALIGN=CENTER>Zint Barcode Generator</P>
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<H1>5.6 Two-Dimensional Symbols</H1>
<P><A NAME="DMATRIX"></A><FONT SIZE=5><B>5.6.1 Data Matrix (ISO
16022)</B></FONT></P>
<P>Also known as Semacode this symbology can encode a large amount of
data in a small area. Any length ASCII string can be encoded up to
780 characters. Symbol size is determined by the length of the input
data and Reed-Solomon error correction is added.</P>
<P ALIGN=CENTER><IMG SRC="matrix.png" NAME="graphics1" ALIGN=LEFT WIDTH=44 HEIGHT=44 BORDER=0><BR CLEAR=LEFT><BR><BR>
</P>
<P><A NAME="QRCODE"></A><FONT SIZE=5><B>5.6.2 QR Code (ISO 18004)</B></FONT></P>
<P>Also known as Quick Response Code this symbology was developed by
Denso. QR Code support in Zint relies on <I>libqrencode</I> (version
2.0.0) which is available from
<A HREF="http://megaui.net/fukuchi/works/qrencode/index.en.html">http://megaui.net/fukuchi/works/qrencode/index.en.html</A>.
Support for QR Code through <I>libzint</I> means that developers only
need to write handlers for one API which covers QR Code as well as
all of the other code symbologies provided by <I>libzint</I>. Four
levels of error correction are available using the <FONT FACE="Courier, monospace">security=</FONT>
option or setting <FONT FACE="Courier, monospace">option_1</FONT> as
shown in the following table.</P>
<DL>
<DL>
<DL>
<DL>
<DL>
<DL>
<DL>
<DD>
<TABLE WIDTH=715 BORDER=1 CELLPADDING=4 CELLSPACING=3>
<COL WIDTH=74>
<COL WIDTH=113>
<COL WIDTH=261>
<COL WIDTH=218>
<TR VALIGN=TOP>
<TD WIDTH=74>
<P ALIGN=CENTER><B>Input</B></P>
</TD>
<TD WIDTH=113>
<P ALIGN=CENTER><B>ECC Level</B></P>
</TD>
<TD WIDTH=261>
<P ALIGN=CENTER><B>Error Correction Capacity</B></P>
</TD>
<TD WIDTH=218>
<P ALIGN=CENTER><B>Recovery Capacity</B></P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=74>
<P ALIGN=CENTER>1</P>
</TD>
<TD WIDTH=113>
<P ALIGN=CENTER>L (default)</P>
</TD>
<TD WIDTH=261>
<P ALIGN=CENTER>Approx 20% of symbol</P>
</TD>
<TD WIDTH=218>
<P ALIGN=CENTER>Approx 7%</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=74>
<P ALIGN=CENTER>2</P>
</TD>
<TD WIDTH=113>
<P ALIGN=CENTER>M</P>
</TD>
<TD WIDTH=261>
<P ALIGN=CENTER>Approx 37% of symbol</P>
</TD>
<TD WIDTH=218>
<P ALIGN=CENTER>Approx 15%</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=74>
<P ALIGN=CENTER>3</P>
</TD>
<TD WIDTH=113>
<P ALIGN=CENTER>Q</P>
</TD>
<TD WIDTH=261>
<P ALIGN=CENTER>Approx 55% of symbol</P>
</TD>
<TD WIDTH=218>
<P ALIGN=CENTER>Approx 25%</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=74>
<P ALIGN=CENTER>4</P>
</TD>
<TD WIDTH=113>
<P ALIGN=CENTER>H</P>
</TD>
<TD WIDTH=261>
<P ALIGN=CENTER>Approx 65% of symbol</P>
</TD>
<TD WIDTH=218>
<P ALIGN=CENTER>Approx 30%</P>
</TD>
</TR>
</TABLE>
</DL>
</DL>
</DL>
</DL>
</DL>
</DL>
</DL>
<P><BR><BR>
</P>
<P>The size of the symbol can be set by using the <FONT FACE="Courier, monospace">vers=</FONT>
option or setting <FONT FACE="Courier, monospace">option_2</FONT> to
the QR Code version required (1-40). The maximum capacity of a
(version 40) QR Code symbol is 7089 numeric digits, 4296 alphanumeric
characters or 2953 bytes of data.</P>
<P ALIGN=CENTER><IMG SRC="qr.png" NAME="graphics2" ALIGN=LEFT WIDTH=50 HEIGHT=50 BORDER=0><BR CLEAR=LEFT><BR><BR>
</P>
<P><A NAME="MAXI"></A><FONT SIZE=5><B>5.6.3 Maxicode (ISO 16023)</B></FONT></P>
<P ALIGN=LEFT>Developed by UPS the Maxicode symbology employs a grid
of hexagons surrounding a 'bulls-eye' finder pattern. This symbology
is designed for the identification of parcels. Zint encodes Maxicode
symbols in Mode 2 or Mode 3 depending on the postcode data entered.
In these modes Maxicode symbols are composed of two parts named the
primary and secondary messages. The primary message consists of a
structured data field which includes various data about the package
being sent, the secondary message usually consists of address data in
a data structure. The format of the primary message is given in the
following table:
</P>
<CENTER>
<TABLE WIDTH=810 BORDER=1 CELLPADDING=4 CELLSPACING=3>
<COL WIDTH=270>
<COL WIDTH=513>
<THEAD>
<TR VALIGN=TOP>
<TH WIDTH=270>
<P>Characters</P>
</TH>
<TH WIDTH=513>
<P>Meaning</P>
</TH>
</TR>
</THEAD>
<TBODY>
<TR VALIGN=TOP>
<TD WIDTH=270>
<P ALIGN=CENTER>1-9</P>
</TD>
<TD WIDTH=513>
<P ALIGN=CENTER>Postcode data which can consist of up to 9
digits (for mode 2) or up to 6 alphanumeric characters (for mode
3). Remaining unused characters should be filled with the SPACE
character (ASCII 32).</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=270>
<P ALIGN=CENTER>10-12</P>
</TD>
<TD WIDTH=513>
<P ALIGN=CENTER>Three digit country code according to ISO 3166
(see <A HREF="appxb.html">Appendix B</A>).</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=270>
<P ALIGN=CENTER>13-15</P>
</TD>
<TD WIDTH=513>
<P ALIGN=CENTER>Three digit service code. This depends on your
parcel courier.</P>
</TD>
</TR>
</TBODY>
</TABLE>
</CENTER>
<P ALIGN=LEFT><BR><BR>
</P>
<P ALIGN=LEFT>The primary message can be designated at the command
prompt using the <FONT FACE="Courier, monospace">--primary=</FONT>
switch. The secondary message uses the normal data entry method. For
example:</P>
<P ALIGN=LEFT><FONT FACE="Courier, monospace">zint -o test.eps -b 57
--primary='999999999840012' -d 'Secondary Message Here'</FONT></P>
<P ALIGN=LEFT>When using the API the primary message must be placed
in the <FONT FACE="Courier, monospace">symbol-&gt;primary</FONT>
string. The secondary is entered in the same way as described in
section 4.2.</P>
<P ALIGN=LEFT>Modes 4 to 6 can be encoded using the <FONT FACE="Courier, monospace">--mode=</FONT>
switch or by setting <FONT FACE="Courier, monospace">option_1</FONT>.
Modes 4 to 6 do not require a primary message. For example:</P>
<P ALIGN=LEFT><FONT FACE="Courier, monospace">zint -o test.eps -b 57
--mode=4 -d 'A MaxiCode Message in Mode 4'</FONT></P>
<P ALIGN=LEFT>Mode 6 is reserved for the maintenance of scanner
hardware and should not be used to encode user data. All modes
support extended ASCII characters and number compression. The maximum
length of text which can be placed in a Maxicode symbol depends on
the type of characters used in the text. Example maximum data lengths
are given in the table below:</P>
<CENTER>
<TABLE WIDTH=664 BORDER=1 CELLPADDING=4 CELLSPACING=3>
<COL WIDTH=138>
<COL WIDTH=160>
<COL WIDTH=164>
<COL WIDTH=153>
<THEAD>
<TR VALIGN=TOP>
<TH WIDTH=138>
<P>Mode</P>
</TH>
<TH WIDTH=160>
<P>Maximum Data Length for Capital Letters</P>
</TH>
<TH WIDTH=164>
<P>Maximum Data Length for Numeric Digits</P>
</TH>
<TH WIDTH=153>
<P>Number of Error Correction Codewords</P>
</TH>
</TR>
</THEAD>
<TBODY>
<TR VALIGN=TOP>
<TD WIDTH=138>
<P ALIGN=CENTER>2 (secondary only)</P>
</TD>
<TD WIDTH=160>
<P ALIGN=CENTER>84</P>
</TD>
<TD WIDTH=164>
<P ALIGN=CENTER>126</P>
</TD>
<TD WIDTH=153>
<P ALIGN=CENTER>50</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=138>
<P ALIGN=CENTER>3 (secondary only)</P>
</TD>
<TD WIDTH=160>
<P ALIGN=CENTER>84</P>
</TD>
<TD WIDTH=164>
<P ALIGN=CENTER>126</P>
</TD>
<TD WIDTH=153>
<P ALIGN=CENTER>50</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=138>
<P ALIGN=CENTER>4</P>
</TD>
<TD WIDTH=160>
<P ALIGN=CENTER>93</P>
</TD>
<TD WIDTH=164>
<P ALIGN=CENTER>135</P>
</TD>
<TD WIDTH=153>
<P ALIGN=CENTER>50</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=138>
<P ALIGN=CENTER>5</P>
</TD>
<TD WIDTH=160>
<P ALIGN=CENTER>77</P>
</TD>
<TD WIDTH=164>
<P ALIGN=CENTER>110</P>
</TD>
<TD WIDTH=153>
<P ALIGN=CENTER>66</P>
</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=138>
<P ALIGN=CENTER>6</P>
</TD>
<TD WIDTH=160>
<P ALIGN=CENTER>93</P>
</TD>
<TD WIDTH=164>
<P ALIGN=CENTER>135</P>
</TD>
<TD WIDTH=153>
<P ALIGN=CENTER>50</P>
</TD>
</TR>
</TBODY>
</TABLE>
</CENTER>
<P ALIGN=LEFT><BR><BR>
</P>
<P ALIGN=LEFT><B>PLEASE NOTE</B> that due to the unique style of the
Maxicode symbol not all of the options available for other
symbologies are available. Settings for height, whitespace width,
border width and output options will be ignored. Colour options are
available as with other symbologies. PNG output is set at a
resolution of 12 pixels per millimetre (approx 300 dpi) and uses the
methods set out in Annex J of the ISO/IEC standard.</P>
<P ALIGN=LEFT><IMG SRC="maxicode.png" NAME="graphics3" ALIGN=LEFT WIDTH=150 HEIGHT=150 BORDER=0><BR CLEAR=LEFT><BR><BR>
</P>
<HR>
<TABLE WIDTH=100% BORDER=0 CELLPADDING=0 CELLSPACING=0>
<TR VALIGN=TOP>
<TD WIDTH=33% HEIGHT=5>
<P ALIGN=LEFT><A HREF="fourstate.html">Prev</A></P>
</TD>
<TD WIDTH=34%>
<P ALIGN=CENTER><A HREF="index.html">Home</A></P>
</TD>
<TD WIDTH=33%>
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</TD>
</TR>
<TR VALIGN=TOP>
<TD WIDTH=33%>
<P ALIGN=LEFT>4-State Codes</P>
</TD>
<TD WIDTH=34%>
<P ALIGN=CENTER>&nbsp;</P>
</TD>
<TD WIDTH=33%>
<P ALIGN=RIGHT>Markings</P>
</TD>
</TR>
</TABLE>
<P><BR><BR>
</P>
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