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Editor to share with you what is the difference between one-dimensional code and two-dimensional code, I hope you will gain something after reading this article, let's discuss it together!

Difference: the content of one-dimensional code can only be letters and numbers, the large size and low utilization of space determines the low information capacity, which can only hold 30 characters, while the information capacity of two-dimensional code is very large, up to 1850 characters by big data. One-dimensional codes can only express information horizontally, while two-dimensional codes can express information in both horizontal and vertical directions.

Bar code is to arrange a number of black stripes and blanks with different widths according to certain coding rules to express different information. at present, there are two kinds of bar codes: one-dimensional code and two-dimensional code.

One-dimensional code can improve the speed of information input, but it can only express information horizontally, and the data capacity is small. Except for individual codes that can contain some visible characters, most codes can only contain numbers and letters. The size of the bar code is relatively large (low space utilization) and cannot be recognized once it is destroyed.

The two-dimensional code can express information in both horizontal and vertical directions, and the data capacity is large, and the information content can contain Chinese characters, characters, letters, numbers, etc., and can be read directly by scanning equipment without connecting to the database. The bar code is relatively small in size (high space utilization) and has the ability of anti-damage.

The difference between one-dimensional code and two-dimensional code

1. Information capacity is different.

The content of one-dimensional code can only be letters and numbers, and the large size and low utilization of space determines the low information capacity, which can only hold 30 characters, while the information capacity of two-dimensional code is very large, up to 1850 characters by big data.

2. Different ways of expressing information

One-dimensional code can only express information in the horizontal direction, its height is usually for the convenience of bar code equipment to read, and one-dimensional code can not directly express commodity information, it needs to be connected to another database. The QR code can express information in both horizontal and vertical directions, and the commodity information can be stored directly without the need for a separate database.

3. Different error correction abilities.

One-dimensional code does not have a strong error correction function, if the bar code is damaged, it will lead to unrecognizable. The error correction rate of QR code is divided into four grades L, M, Q and H from low to high. The maximum error correction rate of each grade is 7%, 15%, 25% and 30%, respectively. The error correction rate level of QR code can be manually selected in the bar code software.

4. The two code systems are different.

One-dimensional code and two-dimensional code have their own bar code system and constituent members respectively. The commonly used one-dimensional code: 128 code, EAN code, crossover 25 code, UPC code, ISBN code, Codabar (Kudba code) and so on. The commonly used two-dimensional code: QR Code, data Matrix, PDF 417.

5. The scope of application is different.

One-dimensional codes are widely used in commercial, postal, library management, warehousing, industrial production process control, transportation and other fields. QR codes are mostly used in: information acquisition, website jump, advertising push, mobile e-commerce shopping, anti-counterfeiting traceability, preferential promotion, member management, mobile payment, account login and so on.

After reading this article, I believe you have a certain understanding of "what's the difference between one-dimensional code and two-dimensional code". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for your reading!

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