Even if you have never heard the term ‘QRcode’ it’s likely that you are familiar with them subconsciously. Over the past few years, QR codes have become increasingly popular, a surge triggered by the wider access to smartphones.
QR Code: What Is It and How Does It Work?
QR stands for Quick Response – based on the ability to be read quickly on a mobile device. QR codes are used to process information on a transitory media, so it can be displayed on your phone. You can find QR codes on a wide range of mediums, such as a billboard, magazine advert, or a web page.
Once your phone collects the code, it shows details about a business. For instance, it can show a URL, which can give you a coupon.
QR Codes are preferred over standard bar codes as they can store a greater amount of data, including text, geo coordinates, and URL links. Moreover, rather than being dependent on a hand-held scanner, QR codes allow you to use smart phones to scan valuable information.
Structure of a QR Code
A QR code comprises of 7 parts. They combine to form a pixel pattern, appearing similar to a crossword puzzle. These elements convey different information, such as error tolerance, timing, print direction, and empty spaces.
How to Scan QR Codes
Today, you can scan QR codes through a smartphone. There are several free apps on both Android and iOS platforms.
A Brief History about QR Codes
QR codes were designed as barcodes. Their purpose was to improve the customer experience in supermarkets. In the 1960s,Japan was moving rapidly inching rapidly towards economic prosperity. Their supermarkets expanded and added a wide range of products to meet customer demands. However, they needed a solution that could help them to manage and track their products.
Before the creation of barcodes, cashiers manually added information of individual items. As a result, it took them a great 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 these processes and made life easier for both the supermarket management and customers.
However, barcodes could not store more than20 alphanumeric characters of information and were limited due to their support for a single dimension (one direction of coding). Due to rising concerns regarding barcodes, Denso Wave, a company that deals with automatic identification products, created QR codes to resolve this issue. QR codes were different 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 either too complex or are too limited in terms of functionality. Image-Charts have made it easy for you to generate QR codes.
Click on this link to 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 modify the 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 to define at least two parameters – chart type (cht = qr) and data (chl =<data>).
While setting a value for chl, you can only use data that consists of alphanumeric characters, digits, Kanji, or binary bytes of data. It’s not allowed to mix data types. Also, note you can only use “UTF-8” for data encoding.
If you are a beginner, bear in mind thatURLs are limited due to their max length (2K). This means that if you intend to cross 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 the chof 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 goes missing, misread, or becomes obscured. QR codes provide support for error correction up to four levels to recover this data. Storing less data increases redundancy. The syntax is as follows:
For error_correction_level, you can choose any of the four levels.
· L – Allows you to recover 7% of the 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 that surrounds the code’s data portion. It is modified in terms of rows with a default value of 4.