A QR code (Quick Response code) is the two-dimensional barcode invented in 1994 by Denso Wave, a Japanese automotive company. A barcode is a machine-readable optical label that contains information that can be accessed by reading it.
In practice, QR codes often contain data for a locator, identifier, or link that points to a website or application. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to store data efficiently.
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QR codes v/s standard barcodes
The Quick Response system became popular due to its fast readability and greater storage capacity compared to standard barcodes. Support to read QR codes via cameras has led to widespread adoption of the QR codes for uses like marketing campaigns, restaurant menus, getting users from physical pamphlets to open website URLs, check-in to buildings, link to fill forms, and much more.
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How QR codes are read by cameras ?
A QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. The required data is
then extracted from patterns that are present in both horizontal and
vertical components of the image.
COVID-19 pandemic and QR code adoption
With the COVID-19 pandemic, QR code has found widespread adoption and now people expect QR codes as a daily part of their life, whether they want to access the restaurant menu, check-in to a building, access marketing coupons from a billboard, etc.
With countries like Singapore use QR codes to track and control the spread of COVID-19 via a QR code check-in app called Safe Entry and then Trace Together.
Types of QR codes
QR codes are of two major types, not talking about the kind of information that is stored in them,
1. Single-use or Static QR codes
2. Multi-use or Dynamic QR codes
Single use or Static QR codes are QR codes in which the information stored cannot be changed, while Dynamic QR codes are multi use QR codes provided by qr code generator like Qburb.
Check our other blog post explaining in detail the difference between Static v/s Dynamic QR codes.
Advantages of QR codes made using Qburb are :
- All QR codes are dynamic hence, you can keep using the same QR code for newer information as the information changes without needing to print your QR code again.
- Since, the QR codes are dynamic you also get analytics as to how the QR code is being used, when it is being used etc.
- One of the most important use case is, its good for the environment as it removes the need for printing your QR codes multiple times. Save our earth ! Be more sustainable.
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