Even if you have never heard the term ‘QRcode’ it’s likely that you are familiar with them subconsciously. Over the pastfew years, QR codes have become increasingly popular, a surge triggered by thewider access to smartphones.
QR Code: What Is It and How Does It Work?
QR stands for Quick Response – based on theability to be read quickly on a mobile device. QR codes are used to processinformation on a transitory media, so it can be displayed on your phone. Youcan find QR codes on a wide range of mediums, such as a billboard, magazineadvert, or a web page.
Once your phone collects the code, it showsdetails about a business. For instance, it can show a URL, which can give you acoupon.
QR Codes are preferred over standardbarcodes as they can store a greater amount of data, including text, geocoordinates, and URL links. Moreover, rather than being dependent on ahand-held scanner, QR codes allow you to use smart phones to scan valuableinformation.
Structure of a QR Code
A QR code comprises of 7 parts. Theycombine to form a pixel pattern, appearing similar to a crossword puzzle. Theseelements convey different information, such as error tolerance, timing, printdirection, and empty spaces.
How to Scan QR Codes
Today, you can scan QR codes through asmartphone. There are several free apps on both Android and iOS platforms.
A Brief History about QR Codes
QR codes were designed as barcodes. Theirpurpose was to improve the customer experience in supermarkets. In the 1960s,Japan was moving rapidly inching rapidly towards economic prosperity. Theirsupermarkets expanded and added a wide range of products to meet customerdemands. However, they needed a solution that could help them to manage andtrack their products.
Before the creation of barcodes, cashiersmanually added information of individual items. As a result, it took them agreat deal of time to deal with customers. There was also the health dilemma –manually performing these tasks caused carpal tunnel syndrome in many people.The integration of barcodes in Point of Sale (PoS) systems streamlined theseprocesses and made life easier for both the supermarket management andcustomers.
However, barcodes could not store more than20 alphanumeric characters of information and were limited due to their supportfor a single dimension (one direction of coding). Due to rising concernsregarding barcodes, Denso Wave, a company that deals with automaticidentification products, created QR codes to resolve this issue. QR codes weredifferent because they were 2-D code .i.e. supported two directions of coding.
How to Generate a QR Code in Less Than 5 Minutes
If you want to learn how to generate a QRcode, then there are several available tools. However, most of them are eithertoo complex or are too limited in terms of functionality. Image-Charts havemade it easy for you to generate QR codes.
Click on this linkto open the chart editor. Make changes to the following fields.
chl= TutorialOn How to Create a QR Code
So here’s what we did:
· Set chs, which stands for chart size. It has two parameters to modifythe width and size of a chart.
· Set cht, which stands for chart type. We added ‘qr’ to generate a QRcode.
· Changed the text for chl, which stand for chart label.
· Used choe for data encoding.
Keep in mind that that you are required todefine at least two parameters – chart type (cht = qr) and data (chl =<data>).
While setting a value for chl, you can only use data that consistsof alphanumeric characters, digits, Kanji, or binary bytes of data. It’s notallowed to mix data types. Also, note you can only use “UTF-8” for dataencoding.
If you are a beginner, bear in mind thatURLs are limited due to their max length (2K). This means that if you intend tocross this limit, you will need POST to send your data.
You can generate QR code in only .png and.svg formats. To choose them for your output format, adjust their values in thechof parameter.
chl = This is how you set output format for your QRcodes
You can change the background color of yourQR code by modifying the icqrb parameter.It supports the RRGGBB[AA] hexadecimal format.
With QR codes, it’s possible that data goesmissing, misread, or becomes obscured. QR codes provide support for errorcorrection up to four levels to recover this data. Storing less data increasesredundancy. The syntax is as follows:
For error_correction_level, you can chooseany of the four levels.
· L – Allows you to recover 7% ofthe lost data.
· M – Allows you to recover 15%of the lost data
· Q – Allows you to recover 25%of the lost data
· H – Allows you to recover 30%of the lost data
Margin refers to the white border thatsurrounds the code’s data portion. It is modified in terms of rows with adefault value of 4.