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QR CODE T-SHIRTS

A QR (Quick Response) code is a print based hyperlink, simply cell phone readable bar code, it contain phone number, an SMS message, URL, email addresses, V-Card data or just plain alphanumeric text.

What is QR?

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It is a two-dimensional barcode, which has encoded in it a URL (web address), text, or other information which is read by a QR code and then point a mobile phone (or other camera-enabled mobile) at it. If mobile phone has QR code software, it just directly goes straight to that URL or related browser. It also contain own error correction data, internal orientation calibration and self-alignment markers. The technical specifications for a QR Code are set down in the ISO-18004 standard so they are the same all over the world, and the only significant variations from one QR code to another (apart from the data it contains) is the number of modules required to store the data.
  • A Version 1 QR Code is a 21x21 array of data elements with the array increasing in size by 4 modules and it can hold 25 characters

  • The largest standard QR Code is a Version 40 symbol that 177x177 modules in size and can hold up 4296 characters of alphanumeric data (theoretically).
While there is still a lot of scope for improvement, the resolution of average present-day camera-enabled portable devices is such that the size of the data modules (dots) on a QR Code of Version 5 or above (37x37) presents a real risk of incorrect decoding of the symbol by the device. When creating a QR Code intended for use with mobile phones and PDA's it's best to stick to Version 4 or lower, and a QR Code symbol of at least 2cm (0.85inches) across.

List of QR code Scanner for Download

iPhones

RedLaser-Barcode Scanner and QR code Reader Impossibly accurate barcode scanning, scan faster, shop smarter.
Bakodo - Barcode Scanner and QR Bar Code Reader is the best companion for your barcode scanning and shopping needs.
Qrafter - QR Code Reader is a two-dimensional barcode scanner and generator for iPhone and iPod Touch. Its main purpose is to scan and parse the contents of QR Codes.
Scan is the most straightforward QR Code scanner available. Scan is completely free.
i-nigma QR code
turns your camera into a sophisticated barcode reader.

Android

QuickMark QR code Reader is a mobile barcode scanner app that allows auto-scanning of multiple barcode formats from your phone.
QR code Reader / Scanner

Scan 2d QR codes and barcodes of other formats.

EggMon barcode and QR search

is a Barcode and QR code search application.
CertainTeed QR Code Reader is a full-featured and integrated QR code reader.
QR code widget - QR Code Contact Info, Email, Phone, Url, Text, SMS display widget No check input validated