QR codes are creeping into many aspects of our lives, making things quicker, easier and more efficient. Restaurants, bars, tourist attractions, magazines, food packaging, entertainment venues, the NHS – these patterned squares are popping up everywhere, but what exactly is a QR code, and how do they work? Read on to find out.
What is a QR Code?
QR stands for ‘Quick Response’, as one scan of a QR code retrieves information instantly. Smartphones can quickly scan a QR code and read and process them through a clickable link that appears. They are two-dimensional barcodes that can lead you to a location online, such as a download or a website. They act as a visual hyperlink. A QR code consists of two elements, three squares that sit in the corner of the code, allowing the scanner to navigate it, and the code itself, which contains the required information within the pattern.
How do QR Codes Work?
A QR code contains a black and white pattern within a square graphic in which information is embedded. The camera or app scans the code to read it. A QR code can hold up to 177 x 177 elements as well as half an A4 page of text.
What are QR Codes Used For?
QR codes can be used on tickets, posters, stamps, vending machines, healthcare settings, product manuals, bars, restaurants and tourist attractions, among an increasing number of other settings. Many travel tickets are now displayed using QR codes to allow ticket inspectors to check them quickly
The common uses of a QR code are:
- To open a new browser window
- To display maps and locations
- To link to social media pages (Facebook, Twitter etc.)
- To display static text
- To send a pre-made SMS or email
- To connect to Wi-Fi networks
- To transfer crypto-currency
- To place orders
- To download PDF files
- To link to an MP3 file
- To link to an app in the app store
- To retrieve pictures
- To assist AI technology in conjunction with other apps
QR Codes – Advantages and Disadvantages
The main advantage of QR codes is that they speed up and simplify many processes. By quickly scanning the pattern, you can instantly access the required links, documents, visuals and information. It also helps streamline businesses, with hospitality venues having customers order from their seats rather than crowding bar areas. Another advantage is the potential scope. More and more industries rely on QR codes, making things more convenient and safe.
The disadvantages are that some clever hackers are creating malicious QR codes. This means you must be vigilant and only scan recognised or authorised codes. Another point is that QR codes need to be static to be read and, therefore, can not be used on moving objects.
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