A QR Code (short for “Quick Response Code) is a type of matrix barcode (actually a two-dimensional barcode) and was first designed in 1994 for the Japanese automotive industry. Basically a qr code is a machine readable optical label which contains various information such as website URL, Paypal payments, physical street addresses, V-cards, WIFI info and even plain text. Since QR codes uses four (4) standardized encoding modes, you can efficiently store many types of data.
The Quick Response Code (qr code) has become very popular outside the automotive industry because of the much larger storage capacity compared to standard UPC barcodes. People are finding some very useful ways to engage people in direct mailing, print publications and of course online websites.
A qr code consists of colored squares arranged on a square grid which is normally used on a white background. While not mandatory to use a white background, one must be careful to use colors that can be read by devices such as phone cameras. The embedded data is extracted from the square patterns which are present in both horizontal and vertical components of the image.
The most common usage these days is to get to websites more quickly and in advertisements.
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