QR stands for Quick Response, it contains a graphic bar code that your cell phone reads and can store anything from a website address, plain text, phone numbers, email address, messages, pictures or any other alphanumeric data. Storing up to 4296 characters are standardised under iso 18004.
QR Code (abbreviated from Quick Response Code) is the trademark for a type of matrix barcode (or two-dimensional code) first designed for the automotive industry. More recently, the system has become popular outside the industry due to its fast readability and large storage capacity compared to standard UPC barcodes. The code consists of black modules (square dots) arranged in a square pattern on a white background. The information encoded can be made up of four standardized kinds ("modes") of data (numeric, alphanumeric, byte/binary, Kanji), or through supported extensions, virtually any kind of data.
Invented in Japan by the Toyota subsidiary Denso Wave in 1994 to track
vehicles during the manufacturing process, the QR Code is one of the most
popular types of two-dimensional barcodes. It was designed to allow
its contents to be decoded at high speed.
Unlike the old barcode that was designed to be mechanically scanned by a narrow beam of light, the QR code is detected as a 2-dimensional digital image by a semiconductor image sensor and is then digitally analyzed by a programmed processor. The processor locates the three distinctive squares at the corners of the image, and normalizes image size, orientation, and angle of viewing, with the aid of a smaller square near the fourth corner. The small dots are then converted to binary numbers and validity checked with an error-correcting code.
Qr Codes look puzzling but once you scan them you find out just how useful they can be. You can access the information encodded on a qr code with a smartphone equipped with a qr code reader.
Qr Codes are able to work on any smarthone (HTC, LG, Motorola, Nokia, Samsung, Sony or Apple) simply download a qr code reader from your app store, find a list here. Once downloaded, open the application and hold your phone 1-5 inches over the qrcode. Wait for the phone camera to focus, which ususally only takes about a second. Then, the phone should read the qr code and direct you to the link that was embeded into it.
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