Nowadays we all have started making online payments. Mostly whenever online payment is made, you hear the name of QR code. Whenever we make a purchase or transfer money to someone, you have to scan the QR code. Making payment through them becomes very easy. Not only for payment, but QR code is also seen on any packet which is very important. But do you know what is QR code and how does it work? Let’s know everything about QR code.
What is QR Code:
Its full name is Quick Response Code. It works very fast. It is in a box. URL and mobile number are hidden in this box. In such a situation, as soon as you scan it, you get the details of the person to whom you want to make payment. Today most companies use such codes.
Where is QR Code Used:
If you make payment to someone, then the easiest way to make payment is through QR code. You just have to scan it and after entering the amount and UPI ID, the payment is done. The best thing is that you will not have to give change to anyone due to making online payment.
Many things can be done apart from payment. As we have seen, there is a QR code on every product. By scanning it, you can get information about any product. At the same time, there is also QR code in business. It is used as a business card. You can also make it easily. Let’s know how.
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How to Make QR Code:
- You can go to any website online that makes QR code.
- Then you will get many options here which will include URL, Image, VCard, Email and other options.
- If you want to make a QR code, then you have to enter the URL of any one website or product here.
- After this the QR code will be created. After this it can be used.
How to Scan QR Code:
The easiest and most common way to scan a QR code is to use your smartphone and a QR scanning app. There are some QR scanning apps in Google’s Play Store that can do this. On the other hand, if you want to scan the code to make a payment, then scan the code from the payment app with which you are going to make the payment.
If you use an Android smartphone or tablet, then you will find many scanner websites here. If you are an iOS user, then you can download the QR scanner app for iPhone.
Types of QR Code
QR codes are mainly of 2 types. One, Static QR Code and the other, Dynamic QR Code. What is the difference between the two? Let’s understand. Types of QR Code.
1. Static QR Code
Static QR codes are static. They are not edited once generated. That is, the information present in them cannot be changed. That is why they are called Static QR Code. They are used in places where there is no need to update the information. Such as advertisements published in newspapers, TV and magazines, Posters, Business Cards, Web URLs etc.
2. Dynamic QR Code
Dynamic QR codes are dynamic. That is, the information present in them can be changed. And can be updated repeatedly. For example, if you want to change the price of a product after generating its QR Code! Then you can do it easily. That is, the new price gets automatically updated in the QR code. And there is no need to print the QR code again.
Variants of QR Code
There are many variants of QR code. Because over time its design and specifications have changed a lot. And there have been many improvements. That is why today QR codes of different colors and designs are seen. But the question is what do these variants mean? Let’s know The Variants of QR Code :-
Model 1
This is the oldest and original QR code. It is also called the prototype of Model 2 and Micro QR Code. Because both these variants are extensions of Model 1. Although it looks similar to Model 2, it lacks alignment pattern. The largest version of Model 1 is 14 (73×73 modules), which can store a maximum of 1167 numerals.
Model 2
This is an improved version of Model 1. And the term QR Code that you use today is used for this. It contains alignment patterns, which help in reading the distorted image by reducing distortion. Its largest version is 40 (177×177 modules), which can store up to 7089 numerals.
Micro QR Code
This is a smaller version of QR code, which can store only up to 35 numerals. It has only one position detection pattern. Due to which its size is very small. It is an ideal QR code for applications that have space constraints. Such as components of a circuit board.
IQR Code
This is a Matrix Type 2D Barcode, which can be printed in both Rectangle and Square Shapes. It has many versions. If we talk about Square IQR, then its 61 versions (minimum 9×9 modules) and Rectangle IQR has 15 versions (minimum 19×5 modules). That is, it can be easily printed even in the smallest space.
IQR Code is capable of storing maximum data in minimum space. Its maximum storage capacity is 40,000 numeric characters (422×422 modules). Which is many times more than the largest version 40 of Model 2. Also, its error correction rate is also very high (50%). Due to which the code can be scanned even after half the code is damaged.
Frame QR Code
There is an empty space in the center of this QR code, which is called QR Code Frame. Mainly texts, images and graphics are arranged in this frame. But it is not limited to just text, images and graphics. It can also be used in different types of designs and white spaces.
Secure QR Code (SQRC)
This is a secure QR code, which keeps the data present inside it safe with a cryptographic key. And restricts all those devices, which try to access the data. For this, it has a private data segment, which is decrypted with the help of an encryption key. It helps in keeping personal information safe. Especially, it helps in keeping the internal data of companies limited to the people of the company.
However, SQRC Code is not limited to private data only. It is also used for public information. But encryption is not used for this. Because this is an option, which is for especially sensitive information. SQRC Code was developed by Forus Foundation for secure transactions.
HCC2D
HCC2D means High Capacity Colored 2 Dimensional Code. That is, high capacity colored 2D code. This is actually a Color Matrix Code developed by researchers. Which is currently in the Prototype Phase. It uses colors to increase data density. But due to this, Chromatic Distortion is faced during decoding. And to avoid this problem, HCC2D code uses an additional field (Color Palette Pattern).
JAB Code
JAB means Just Another Barcode. It is a coloured QR Code, which is made of a combination of coloured squares within a rectangular or square grid. It has 4 or 8 colours. Out of which 4 are primary colours (Cyan, Magenta, Yellow and Black) and 4 are secondary colours (Blue, Red, Green and White). Since colours add a third dimension to a two-dimensional matrix. That is why JAB Code can store more data than black and white codes.
If seen theoretically, its 4 colour code is capable of storing 2 times more data and 8 colour code is capable of storing 3 times more data. But JAB Code is not licensed yet. Although it was presented for ISO Standardization. But the process of standardization is still in processing. And currently it is published under LGPL v2.1 License.
QR Code Versions
While talking about QR Code Variants above, QR Code Versions were mentioned repeatedly. But the question is what are these QR code versions? And what is their use? Also, how many versions of QR code are there? And which ones? Let’s know.
First of all, let’s talk about the number of versions. So there are a total of 40 versions of traditional QR code. And each version has a different number of data modules. That is, the higher the version number, the higher will be the number of data modules. And the higher the number of data modules, the higher will be the storage capacity of the QR code. That is, the larger the version, the more data it will store.
