What is QR Codes and Bar Codes? How does these codes work?
You must be saw some like code,on top of any of your package, a book, or on top of a soft drink bottle even it also can be found on your T-shirt. QR Codes are more usable than Bar codes. About, most smartphone users knew about he QR code.
Did you ever think the question,Why these codes are added in every where?How is it possible to scan the code? How does they work? Now, it’s time to know. Let’s discuss about both of them.
What is QR Codes?
OR Codes is the short form of ‘Quick Response Code’. The QR code system was invented in 1994 by Denso Wave.It is the trademark for a type of matrix Bar code, first designed for the automotive industry in Japan.A QR code uses for four standardized encoding modes, which are- numeric, alphanumeric, byte/binary, and kanji to efficiently store data.
Actually an QR code consists of black squares that are arranged in a square grid on a white background. Which can be read by an imaging device such as a camera, and it processed by using Reed-Solomon error correction until the image can be appropriately interpreted. The required data are then extracted from patterns, which are present in both Horizontal and vertical components of the images.
On any product, on air, newspaper advertisements, on a website or online, you must be seen to be using of QR codes.The code is located in a square house and it’s contain with many dot.It is also possible to read with a standard scanner like Bar code, Therefore, the barrier is easily possible to bring the stored data. QR codes also known as, Two-dimensional bar code or called D bar code.
How does QR Codes stored data?
Generally, QR codes have three parameters. They are, Datatype, size (number of ‘pixels’) and error correction level. How many information can be stored there,it depends on these parameters.QR Codes made of some multiple rows and columns. The combination of these rows and columns can makes a grid of modules.
When QR Code is being created, the QR Code generator assess the amount of data you are trying to encode and from that it determines the version of the number that it needs to be used.When a QR Code is containing a lot of data, then you may see, it looks “busier” to the naked eye.To storing the actual data by a user wishes to save, the QR Code have to stored other data that forms in the frame works of QR Codes.The codes included timing,positioning and format data as well as error correction and version data.
Moreover, there are some particular feature of this code, that helps to store data. The features are involved in variety works. One of them, helps to distinguish and print out a copy of the code. Another one, helps to indicates the right direction that has been maintained for scanning the code. There is a timing pattern, which helps to identify the individual cell in data values of the code.In addition, there are a few more features. They helps to keeping store data inside of codes.
What is Bar Codes?
Generally, a Bar code is an optical, machine-readable, representation of data.Mainly, Bar codes systematically represents data by varying the widths and spaces of parallel lines. And it may be referred to as linear or one-dimensional.In a long line of black and white of bar code,there information is stored.And here’s a small amount of information can be stored.But after saving information, from these points is also possible to read the data more easily. You have do not need to manually enter any numbers or codes wearing. Just scan the code and you can access all the information.
Generally, there is some numbers stored in bar codes. And the numbers may be entered in different ways. Each long line is stored in a separate number. A laser light has been thrown to the code from scanner.No reflection on the black line does not come back Scanner. And return the reflection of light from the white part.From which part, doesn’t reflected light,that is considered 0 and the reflected part considered 1. By divided This number into the different segment, the receiver easily can read the code through the scanner.
However,There are some limitations of the bar code.If any spots or cut the bar code information can be difficult to take out. This code is much lower amounts of data can be stored. So,if you want to keeps a lot of data, then QR Codes will be suitable for you.
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