Aztec Code

Aztec Code

Aztec Code is a 2 dimensional matrix style bar code symbology. Aztec Code was invented by Andrew Longacre, Jr. of Welch Allyn Inc. in 1995 (later Hand Held Products Inc., now [http://www.honeywell.com/aidc Honeywell Imaging and Mobility] ). The code was published by [http://www.aimglobal.org AIM] International in 1997 and although the code is patented, it has been released to the public domain.

Encoding

The symbol is built on a square grid with a bulls-eye pattern at its centre for locating the code. Data is encoded in a series of circles around the bulls-eye pattern. Each additional circle completely surrounds the previous circle causing the symbol to grow in size as more data is encoded. A dark module is a binary 1 and a light module is a binary 0. The code is orientation independent.

The smallest Aztec Code symbol is 15x15 modules square, and the largest is 151x151. The smallest Aztec Code symbol encodes 13 numeric or 12 alphabetic characters. The largest Aztec Code symbol encodes 3832 numeric or 3067 alphabetic characters or 1914 bytes of data. No empty zone is required outside the bounds of the symbol.

The level of Reed–Solomon error correction [http://www.adams1.com/pub/russadam/stack.html] is configurable, from 5% to 95% of the data region. The recommended level is 23% of symbol capacity plus codewords.

Aztec Code is supposed to be robust according to various printer technologies. It is also well suited for displays of cell phones and other mobile devices.

Character set

# All 8-bit values can be encoded. The default interpretation shall be:
## for values 0 - 127, ANSI X3.4 (i.e., ASCII) and
## for values 128 - 255, ISO 8859-1: Latin Alphabet No. 1.
This corresponds to ECI 000003.
# Two non-data characters can be encoded, "FNC1" for compatibility with some existing applications and "ECI", escape sequence for the standardized encoding of message interpretation information.

Usage

An Aztec code barcode is used by Deutsche Bahn, Trenitalia and by Swiss Federal Railways for tickets sold online and printed out by customers. The barcode is scanned by a handheld scanner by on-train staff to validate the ticket.

Aztec has been selected by the airline industry (IATA's BCBP standard) for the electronic boarding passes. Several airlines send Aztec codes to passengers' mobile phones.

Polish car registration documents bear an encrypted summary encoded as Aztec. Works are underway to enable car insurance companies to automatically fill in the relevant information based on digital photographs of the document as the first step of closing a new insurance contract. Japan, rather than stamping foreigners' passports upon entry, issues stickers into foreigner's passports containing aztec code, linking the passports to each unique sticker in an efford to combat fraud.

ee also

*Barcode
*Data matrix (computer)

External links

* [http://www.aimglobal.org/standards/matrixsymbologies.asp 2D barcodes at AIM]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • Aztec Code — Здесь закодирован текст «This is an example Aztec symbol for Wikipedia.» Aztec Code  двумерный матричный штрихкод. Разработан в 1995 году доктором Andrew Longacre, Jr., исследователем из фир …   Википедия

  • Aztec-Code — Der Aztec Code wurde 1995 von Andy Longacre bei der Firma Welch Allyn in den USA entwickelt. Er ist ein frei verfügbarer 2D Code mit der US Patent Nr. 5591956. Er ist unter ISO/IEC 24778 normiert. Der Name Aztec Code leitet sich von der… …   Deutsch Wikipedia

  • Aztec Code — Beispiel eines Aztec Codes Der quadratische Aztec Code wurde 1995 von Dr. Andy Longacre bei Welch Allyn (USA) entwickelt. Er ist frei verfügbar und wird für viele Anwendungen genutzt. Er ist unter ISO/IEC 24778 normiert. Inhaltsverzeichnis 1… …   Deutsch Wikipedia

  • ГОСТ Р ИСО/МЭК 24778-2010: Информационные технологии. Технологии автоматической идентификации и сбора данных. Спецификация символики штрихового кода Aztec Code — Терминология ГОСТ Р ИСО/МЭК 24778 2010: Информационные технологии. Технологии автоматической идентификации и сбора данных. Спецификация символики штрихового кода Aztec Code оригинал документа: 3.1.4 блок типа домино (domino): Двухмодульная… …   Словарь-справочник терминов нормативно-технической документации

  • Aztec (disambiguation) — Aztec or Aztek could mean:*The Aztec civilization of Mesoamerica *The Nahuatl language, also known as Aztec *Aztec, New Mexico, a city in the United States ** the Aztec meteorite of 1938, which fell in New Mexico, United States (see Meteorite… …   Wikipedia

  • Code 93 — Barcode Als Strichcode, Balkencode oder Barcode (engl. bar für Balken) wird eine optoelektronisch lesbare Schrift bezeichnet, die aus verschieden breiten, parallelen Strichen und Lücken besteht. Der Begriff Code steht hierbei nicht für… …   Deutsch Wikipedia

  • Code 39 — A Code 39 Barcode Label WIKIPEDIA encoded in Code 39 Code 39 (also known as Alpha39, Code 3 of 9, Code 3/9, Type 39 …   Wikipedia

  • Code 128 — Wikipedia encoded in Code 128 B Code 128 is a very high density barcode symbology. It is used for alphanumeric or numeric only barcodes. It can encode all 128 characters of ASCII and, by use of an extension character (FNC4), the Latin 1… …   Wikipedia

  • Code 93 — WIKIPEDIA encoded in Code 93 Code 93 is a barcode symbology designed in 1982 by Intermec to provide a higher density and data security enhancement to Code 39. It is an alphanumeric, variable length symbology. Code 93 is used primarily by Canada… …   Wikipedia

  • Code-barres 2D — Un code barres 2D ou codes barres à deux dimensions est un format à deux dimensions du codes barres classique. Pictogramme constitué de petits carrés, le code barres 2D peut notamment être décodé par des téléphones mobiles disposant d une… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”