| Open 2D Code |
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For 2D Code to become widely used, it is first
necessary for QR Code specification to be clearly defined and
made public. In addition, QR Code must be freely usable by users.
The background behind the popularity of bar codes,
is specification disclosure. Today, there are very few bar codes
with closed specifications or strict patent protection.
QR Code is open in the sense that the specification
of QR Code is disclosed and that the patent right owned by
Denso Wave is not exercised. |
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| History of QR Code Standardization |
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|
QR Code is standardized
as below. This shows that QR Code has been accepted internationally,
ensuring its widespread acceptance not only domestically, but
also overseas. |
| QR Code Standardization |
| October, 1997 |
Approved as AIM International (Automatic
Identification Manufacturers International) standard (ISS
- QR Code) |
| March, 1998 |
Approved as JEIDA (Japanese Electronic Industry
Development Association) standard (JEIDA-55) |
| January, 1999 |
Approved as JIS (Japanese Industrial Standards)
standard (JIS X 0510) |
| June, 2000 |
Approved as ISO international standard (ISO/IEC18004) |
| November, 2004
|
Micro QR Code is Approved as JIS (Japanese Industrial
Standards) standard (JIS X 0510)
|
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| QR Code Outline Specification |
|
|
| Symbol size |
21 × 21 - 177 × 177
modules (size grows by 4 modules/side) |
Type
& Amount of Data
(Mixed use is possible.) |
Numeric |
Max. 7,089 characters |
| Alphanumeric |
Max. 4,296 characters |
| 8-bit bytes (binary) |
Max. 2,953 characters |
| Kanji |
Max. 1,817 characters |
Error
correction
(data restoration) |
Level L |
Approx. 7% of codewords can be
restored. |
| Level M |
Approx. 15% of codewords can
be restored. |
| Level Q |
Approx. 25% of codewords can
be restored. |
| Level H |
Approx. 30% of codewords can
be restored. |
| Structured
append |
Max. 16 symbols (printing in
a narrow area etc.) |
|
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| Obtaining QR Code Specification |
|
|
QR Code is established as an ISO
(ISO/IEC18004) standard. QR Code specification can, therefore,
be purchased from this organization. |
<Buy ISO Standards> |
Go to "Search and Standards" and search
by ISO Number for 18004.
|
http://www.iso.ch/iso/en/prods-services/ISOstore/store.html
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