How to read 2D barcodes? QR code What is a barcode

2-dimensional bar code *** (2-dimensional bar code) is a black and white graphic distributed in a plane (two-dimensional direction) with a specific geometric figure according to a certain law to record data symbol information; In the first compilation, the concept of "0" and "1" bit streams that form the basis of the internal logic of the computer is cleverly used, and a number of geometric shapes corresponding to the binary are used to represent the numerical information of the text, and the information is automatically read by the image input device or the photoelectric scanning device to realize the automatic processing of information: it has some commonalities of barcode technology: each symbol system has its specific character set; Each character occupies a certain width; It has a certain verification function, etc.

At the same time, it also has the characteristics of automatic recognition of information of different lines and processing of graphic rotation changes.

Two-dimensional barcodes can express information in both horizontal and vertical directions at the same time, so it can express a large amount of information in a small area.

To use a barcode reader to identify, it is impossible to understand with the naked eye.

Specialized instrument scanning readouts are required.

If it is, you scan it with your phone and the information will appear. Such as the ex-factory price...

It's a square grid. The barcode is scanned by the supermarket.

Summary. Hello dear. It depends.

In general, both are fine. If you want to check whether it is true or fake, you can scan the corresponding *** or barcode; If you are getting more information, you can use the barcode to query more detailed information, or you can use *** to identify the corresponding information.

Hello dear. It depends on the situation. Generally speaking, both can be sailed.

If you want to check whether it is true or fake, you can scan the corresponding *** or barcode; If you want to get detailed information, you can use the barcode to query for more detailed information, or you can use *** to identify the corresponding information.

Hello dear. **Query anti-counterfeiting scanning is an effective anti-counterfeiting query can be scanned *** query, the specific steps are: 1. Open the mobile phone WeChat or other apps with the function of scanning; 2. Turn on the scan function (scan function); 3. Scan the frame with the barcode on the product; 4. If the code is scanned successfully, the information can be identified, and the true and false of the thing can be determined according to the content displayed by the scanned code.

In addition to scanning ***, you can also log in to the China commodity information service platform or anti-counterfeiting query center and enter the product barcode for verification. Barcodes are generally used for commodity inventory and transactions, when the goods are entered, you can find the relevant information, and you can't find it if you haven't entered the imitation brother. Check the authenticity of the scanning precautions 1, with the mobile phone software to scan the code can see the name of the product, the place of origin, the manufacturer and **, but some product information is updated quickly, the database may not have relevant information, coupled with the software is not upgraded in time and other reasons, will lead to the scan of commodity information, therefore, scanning the bar code is not used as the basis for judging the authenticity of the goods, to follow the relevant purchase inspection system to inspect the goods.

2. The barcode of the nuclear goods can be copied, if the barcode of the regular commodity is sprayed on the counterfeit and shoddy products, then it is not credible to distinguish the authenticity by scanning the code. I hope mine can help you.

There are also some products that need to go to the official website to scan the code to verify the authenticity. For example, Nike is an official website query.

What is Nike.

Clothing brands.