Today, QR codes can be seen in newspapers, magazines, flyers, posters, etc. You can easily spot the QR codes around you. It lets you interact with the world by using your smartphones, tablets, or computers.
Every year, a large portion of the $5.5 trillion payments made via mobile went through a QR code on various apps in China.
QR code means "Quick Response." It's a two-dimensional bar code readable by smartphones, tablets, and computers(having a webcam facility).
The QR code contains information accessible along two dimensions: horizontal and vertical. It has black squares and dots with various hazy patterns arranged in a squared grid on a white background. The information is extracted from those fuzzy patterns.
QR Codes may contain links (to websites, videos, or files), email addresses, text, phone numbers, vCards, and more.
Denso Wave invented the QR code in 1994. However, after its invention, it got famous because of its ability to store many data. You can encode 4296 alphanumeric characters in a single bar code.
A QR code scanner or QR code reader is an optical scanning device able to read QR codes. Most smartphones and tablets have built-in QR code scanners in their cameras. However, to scan the QR code from pc, you need a webcam. That means that you can point your camera to a QR code and be able to scan and read it.
When you scan a QR code, you get immediate access to its content. The QR code reader can act on scanning the QR code, like opening the website URL in your browser. Other actions might include storing the business card in your smartphone's business list, connecting to wireless, or perform any other action specified to that QR code.
Most smartphones and tablets have built-in functionality to scan the QR code. However, you can also download the apps available online for that purpose.
But, when scanning the QR code from a PC, it feels a little bit odd. But sometimes you have to do this. It doesn't make any sense to pull out your smartphone or tablet to scan a QR code from your computer's screen and view it on the tiny device—especially when you have the big screen right in front of you.
How to scan a QR code?
For scanning a QR code from your PC, the process is simple. Perform the following steps.
When you scan a QR code with us, you will be asked to give our QR code scanner permission to access the webcam on your PC.
There can be several reasons why our QR code reader is unable to read the code.
The formula to know the ideal size concerning scanning distance is.
QR Code Size (width in inches or cm) = Scanning distance (in inches or cm) ÷ 10
Suppose you want a QR code for the flyer, and the distance between the flyer and the scanning device is 12 inches (one foot). Then the QR code minimum size will be 1.2 inches.
The formula to know the ideal size concerning the amount of data to be encoded is.
QR Code Size (width in inches or cm) = (Scanning distance (in inches or cm)* Number of rows and columns) /250
Here, the number of rows and columns of modules is determined by the Version Number.
Version Number ranges between 1 to 40.
Usually, a dynamic vCard QR code has about 33 rows and columns of data. And if the scanning distance is 0.5 feet or maybe 6 inches. Then the QR code minimum size will be 0.8 inches.
No one can hack the QR code. There are no security flaws—however, it's possible to replace the QR code with another. Users would think that they are scanning the QR code of a trusted company, but it leads them to malicious content.
Or to create a QR code that leads to phishing or malicious content.
You must be careful before scanning the QR code. So you do not be the victim of these malicious contents.
Take the following measures to increase your QR code security.
Perform the following steps to create the QR code.