Martes, 22 Noviembre 2011 15:39

Código QR

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¿Que es un código QR?

Un código QR  (Quick Response Barcode) es un sistema para almacenar información en una matriz de puntos o un código de barras bidimensional creado por la compañía japonesa Denso-Wave en 1994; se caracterizan por los tres cuadrados que se encuentran en las esquinas y que permiten detectar la posición del código al lector. La sigla «QR» se derivó de la frase inglesa pues el creador «Euge Damm» aspiraba a que el código permitiera que su contenido se leyera a alta velocidad. Los códigos QR son muy comunes en Japón y de hecho son el código bidimensional más popular en ese país.

¿Características generales?

Aunque inicialmente se usó para registrar repuestos en el área de la fabricación de vehículos, hoy, los códigos QR se usan para administración de inventarios en una gran variedad de industrias. Recientemente, la inclusión de software que lee códigos QR en teléfonos japoneses, ha permitido nuevos usos orientados al consumidor, que se manifiestan en comodidades como el dejar de tener que introducir datos de forma manual en los teléfonos. Las direcciones y los URLS se están volviendo cada vez más comunes en revistas y anuncios japoneses. El agregado de códigos QR en tarjetas de presentación también se está haciendo común, simplificando en gran medida la tarea de introducir detalles individuales de un nuevo cliente en la agenda de un teléfono móvil.

Los consumidores que cuenten con dispositivos y programas de captura, en combinación con un PC con interfaz RS-232C pueden usar un escáner para leer los datos. El estándar japonés para códigos QR (JIS X 0510) fue publicado en enero de 1999 y su correspondiente estándar internacional ISO (ISO/IEC18004) fue aprobado en junio de 2000. Un detalle muy importante sobre el código QR es que su código es abierto y que sus derechos de patente (propiedad de Denso Wave) no son ejercidos.

¿Que equipos pueden utilizar este código?

Muchos de los móviles más modernos traen incorporadas las aplicaciones que permiten leer éstos códigos. Para los demás equipos es necesario buscar algún programa compatible.

Generalmente para instalar estos programas se solicita el ingreso del número del equipo en la web del mismo. De manera inmediata el usuario recibe un mensaje con un link para instalarlo, así de simple.

Las aplicaciones recomendadas son:
i-nigma reader: uno de los más populares lectores de códigos QR del mundo.
http://www.i-nigma.com/Downloadi-nigmaReader.html

Kaywa Reader: un lector compatible con una gran variedad de smartphones y equipos móviles.
http://reader.kaywa.com/


¿Capacidad de datos del código QR?

Solo numérico: Máx. 7.089 caracteres
Alfanumérico:  Máx. 4.296 caracteres
Binario:       Máx. 2.953 bytes
Kanji/Kana:    Máx. 1.817 caracteres


http://es.wikipedia.org/wiki/C%C3%B3digo_QR

http://www.informatica-hoy.com.ar/aprender-informatica/Codigo-QR-Que-es-utiliza.php

Read 5125 times Last modified on Martes, 23 Octubre 2018 23:28

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