What is the difference between 1D barcode and 2D barcode?

1D barcodes: 1D barcodes only express information in one direction (horizontal), while in the vertical direction they do not express any information, and they require a certain height to facilitate scanning by readers. The application of one-dimensional barcode can improve the speed of information entry, reduce the error rate, and can only represent English, numbers, simple symbols and other characters; The amount of information stored is small, mainly relying on the associated database in the computer; Poor readability after contamination.

1D codes are generally used for the identification of items.

Two-dimensional barcode: store information in both horizontal and vertical two-dimensional space, called two-dimensional barcode, 1 High-density encoding, large information capacity: can accommodate up to 1850 uppercase letters or 2710 numbers or 1108 bytes, or more than 500 Chinese characters, which is about dozens of times higher than the information capacity of ordinary barcode.

2. Wide range of encoding: the barcode can encode the information that can be digitized such as **, sound, text, signature, fingerprint, etc., and represent it with a barcode; It can represent multiple languages; Image data can be represented. 3. Strong fault tolerance and error correction function:

This allows the 2D barcode to be correctly read when it is partially damaged due to perforation, defacement, etc., and the information can still be recovered when the damaged area reaches 50. 4. High decoding reliability: It is much lower than the average barcode decoding error rate of 2 parts per million, and the bit error rate is not more than 1 in 10 million.

5. Encryption measures can be introduced: good confidentiality and anti-counterfeiting. 6 Low cost, easy to make, durable.

7 Barcode symbols, shapes, sizes, and proportions are variable. 8 2D barcodes can be read using a laser or CCD reader. 9 Photocopying and faxing available.

It is generally used to describe the information of the item, and the encryption algorithm can be used to make it have the effect of anti-counterfeiting.

The printing cost of one-dimensional code is low, and the printing cost is slightly higher than that of continuous printing; The price of a 1D code reader is low, while the price of a 1D code reader is higher.

1.Appearance: 1D code: 1D code is composed of vertical black bars and white bars, black and white, and the thickness of the stripes is also different, usually there will be English letters or Arabic numerals under the stripes.

:*** is usually a square structure, not only composed of horizontal and vertical barcodes, but also polygonal patterns in the code area, the same texture is also black and white, different thicknesses, *** is a dot matrix form.

2.Function: One-dimensional code: can identify the basic information of the commodity, such as the name of the commodity, **, etc., but can not provide more detailed information of the commodity, to call more information, the need for further cooperation of the computer database.

: It not only has a unique identification function, but also can display more detailed product content. For example, clothes, not only can show the name of the clothes and **, but also can show what material is used, the percentage of each material, the size of the clothes, how tall people are suitable to wear, and some washing precautions, etc., without the cooperation of computer databases, simple and convenient.

3.Pros & Cons:

One-dimensional code: mature technology, widely used, less information, only support English or numbers, low equipment cost, need to be combined with computer databases.

: dot matrix graphics, high information density, large amount of data, error correction ability, coding patent rights, need to pay fees, *** cannot be changed after generation, high security, support a variety of languages, including English, Chinese, numbers, etc.

The content of the one-dimensional code can only be letters and numbers, and the large size and low space utilization rate determine the low information capacity, which can only accommodate 30 characters; The information capacity is very large, and the maximum data can reach 1850 characters.

One-dimensional codes can only express information horizontally; The *** can express information in both horizontal and vertical directions.

One-dimensional code can improve the speed of information entry, but can only express information horizontally, the data capacity is small, except for individual symbols can contain some visible characters, most of the symbols can only contain numbers and letters, the size of the barcode is relatively large (low space utilization), once it is destroyed, it can not be recognized.

It can express information in both horizontal and vertical directions, the data capacity is large, the information content can contain Chinese characters, characters, letters, numbers, etc., the content can be read directly with scanning equipment, without the need to connect to another database, the relative size of the bar code is small (high space utilization), and it has the ability to resist damage.

It makes no difference. It's just that the name is different, and the effect is the same. Bar code.

It is only used to carry product information. Cashier at the checkout when buying something at the supermarket.

By scanning the barcode, you can know the ** of the product. It can indicate the country of production, manufacturer, product name, type, date, and many other information of the product. Different standards, different packaging, different types, different **, different colors of goods used in the goods**.

It's not the same. Therefore, there is only one ** for each commodity item, and the commodity item and ** are all one-to-one correspondence.