For people who do not understand the QR code mechanism, it is normal to have such concerns. After all, tens of billions of QR codes are consumed every day in the world, and each QR code is different. Once the QR code is used up, How to do?
To answer this question, we need to figure out what is the mechanism behind the QR code and how we can continuously generate different QR codes.
Two-dimensional code is also called two-dimensional bar code. The common two-dimensional code is QR Code, and the full name of QR is Quick Response. It is a very popular encoding method on mobile devices in recent years. It can store more information than traditional barcodes. , Can also represent more data types.
Not only that, the two-dimensional code has a more variable upper limit than the traditional bar code. We can roughly understand that the QR code is really too many to use up!
The QR code was originally invented by a programmer in Japan. Compared with the traditional barcode, the QR code can contain more information, and can be further optimized according to the continuous improvement of mobile phone pixels, which can generate a steady stream of two-dimensional code.
Compared with barcodes, the production cost of QR codes is lower, so it is widely used in payment, medicine, personal information, etc.
Why can't I use up the QR code?
In order to understand why the two-dimensional code can`t be used up more generally, we can replace the two-dimensional code with binary, and it can extend indefinitely with the increase of pixels. For each change, the total number of the two-dimensional code can be The addition of multiples can almost be said to be endless and endless.
Although the QR code is limited, the QR code is almost unlimited. Two-dimensional codes can be combined and arranged at will, and multiple combinations are combined with each other. This also guarantees that although the two-dimensional code is limited, we can still use it almost infinitely.
A seemingly plain two-dimensional code, behind it is actually a high-density code, with a huge amount of information. A two-dimensional code can hold up to 1850 capital letters or 2710 numbers or 1108 bytes, or more than 500 Chinese characters, which is about tens of times higher than the information capacity of ordinary barcodes.
Speaking of which, the QR code is actually very similar to a mobile phone number.
But the total number of mobile phone numbers is only 11 digits, and the multiple combinations of QR codes are far more than 11 variable numbers. Therefore, the total number of QR codes is much higher than that of mobile phone numbers.
What are the advantages of QR codes?
To sum up, the advantages of QR codes are as follows:
High-density coding, large information content
Wide range of coding, almost inexhaustible
Strong fault tolerance, with error correction mechanism
High decoding reliability
Encryption measures can be introduced
Low cost, can be used in any occasion and any industry
At present, QR codes have entered all aspects of our lives. In application scenarios, two-dimensional codes can be used to trace the source of food, allowing consumers to eat more at ease.
The raw material supplier enters some information of the raw material, such as the date of production, the source of allergies, etc., into the QR code. When the food manufacturer puts the raw materials into the warehouse, the data collector is used to read the two-dimensional code to obtain the raw production data of the raw materials. From this data, it can be immediately confirmed whether the delivered product meets the manufacturer's purchasing standards. Then the raw materials are put into storage.
There are also mobile shopping, restaurant menus, shared bicycles, power banks and so on. As a window, the two-dimensional code can effectively connect consumers and businesses and break through the barriers between the two, thereby generating consumer behavior.
