Question 2: What is a general one-dimensional code? Bar code is a mark composed of a set of regularly arranged bars, spaces and corresponding characters. "Strip" refers to the part with low light reflectivity, and "empty" refers to the part with high light reflectivity. The data composed of these bars and spaces express certain information, which can be read by special equipment and converted into binary and decimal information compatible with computers. Usually, the code is unique for each project. For ordinary one-dimensional bar code, the corresponding relationship between bar code and commodity information should be established through the database. When the barcode data is transmitted to the computer, the application programs on the computer will operate and process the data. Therefore, the ordinary one-dimensional bar code is only used as identification information, and its significance is realized by extracting the corresponding information from the database of the computer system.
Question 3: What is a one-dimensional code? One-dimensional code is actually our common bar code.
Almost all of them are on the packaging of goods. When the supermarket settles, the code scanner scans the QR code.
Question 4: What does one-dimensional code mean? The one-dimensional code is a bar code.
The QR code is the graphic code.
Question 5: What's the difference between two-dimensional code and one-dimensional code? Two-dimensional code: The two-dimensional code is usually a square structure, which not only consists of two bar codes horizontally and vertically, but also has a polygonal pattern in the code area. Similarly, the texture of the QR code is black and white, and the thickness is different. The QR code is in the form of a dot matrix! One-dimensional code two-dimensional code function: One-dimensional code can identify the basic information of goods, such as the name and price of goods, but it cannot provide more detailed information of goods. To call more information, we need the further cooperation of computer database. Two-dimensional code: not only has a unique identification function, but also can display more detailed product content. For example, clothes can not only show the name and price of clothes, but also show what materials are used, the percentage of each material, the size of clothes, what size people are suitable for wearing, and some washing precautions. , without the cooperation of computer database, simple and convenient. Advantages and disadvantages One-dimensional code technology is mature, widely used, and has little information, and only supports English or digital devices. The cost is low, and it is necessary to combine the computer database for two-dimensional code dot matrix graphics. The information density is high, the data volume is large, and the coding patent has the ability to correct errors. The two-dimensional code cannot be changed after it is generated, and it has high security and supports many languages, including English, Chinese and numbers.
Question 6: One-dimensional code information? One-dimensional bar codes carry limited information. For example, the barcode on a commodity can only hold 13 digits (EAN- 13 code) * *, and more information can only be supported by the commodity database. If there is no pre-established database, such bar code is meaningless, thus limiting the application scope of bar code to some extent. Because of this, two-dimensional bar code was invented in the 1990s. In addition to the advantages of one-dimensional bar code, two-dimensional bar code also has the advantages of large amount of information, high reliability, strong confidentiality and strong anti-counterfeiting.
Question 7: Which country invented the one-dimensional code? The earliest barcode product was Wrigley gum. Bar code technology was first produced in the jittery 1920s, and was born in the laboratory of Westinghouse. A man named John? John Kermode sex.
bar code
This eccentric inventor "whimsically" wants to realize the automatic sorting of postal documents. At that time, every idea about the application of electronic technology was very novel.
Norman, the inventor of commodity bar code? Woodland is dead.
His idea is to put a barcode on the envelope, and the information in the barcode is the address of the recipient, just like today's postal code. For this reason, Comander invented the earliest bar code recognition, and the design scheme is very simple (note: this method is called modular comparison method), that is, one represents the number "1", two represents the number "2", and so on. Then, he invented a bar code reading device composed of basic components: scanner (which can emit light and receive reflected light); A method for measuring the band and space of reflected signal, namely edge positioning coil; And a method of using the measurement result, namely a decoder.
Comander's scanner uses a newly invented photovoltaic cell to collect reflected light. "Empty" reflects a strong signal, while "bar" reflects a weak signal. Unlike today's high-speed electronic components, Comander uses magnetic coils to measure "bars" and "spaces". Just like a child connecting a wire to a battery and winding it around a nail to clamp paper. Comander uses a coil with an iron core to attract the switch when it receives the "empty" signal, and release the switch when it receives the "bar" signal to connect the circuit. So the earliest bar code readers were very noisy. The switch is controlled by a series of relays, and the "on" and "off" are determined by the number of "paper strips" printed on the envelope. In this way, the bar code symbol directly sorts the letters.
Shortly thereafter, Comand's collaborator Douglas? Douglas Young made some improvements on the basis of Comander code.
Comande code contains so little information that it is difficult to compile more than ten different codes. On the other hand, Yang code uses fewer bars, but takes advantage of the change of the space between bars, just like UPC barcode symbols today use four different bar sizes. The new barcode symbol can encode 100 different regions in the same space, while Comander code can only encode 10 different regions.
It was not until 1949 that Noam first appeared in the patent literature. Norm Woodland and Bernard? The recording of omni-directional bar code symbols invented by Searwar has never been recorded in patent literature before, and there is no precedent for practical application. Norm? Woodland and Bernard? Searwar's idea is to use Comander and Yang's vertical "strips" and "spaces" and bend them into rings, much like the target of archery. In this way, the scanner can decode the bar code symbol by scanning the center of the graph, regardless of the direction of the bar code symbol.
In the process of continuous improvement using this patented technology, a science fiction writer Isaac? Isaac Azimov tells an example of automatic identification using a new information coding method in his book The Naked Sun. At that time, people thought that the barcode symbol in this book looked like Fang Gezi's chessboard, but today's barcode professionals will immediately realize that it is a two-dimensional matrix barcode symbol. Although this bar code symbol has no direction, no positioning and no timing, it is obvious that it represents a digital code with high information density.
It was not until 1970 that Iterface Mechani *** s developed the "two-dimensional code" that the printing and reading equipment of two-dimensional matrix bar code came out at a price suitable for sale. At that time, two-dimensional matrix bar code was used to realize the automation of newspaper typesetting process. Two-dimensional matrix bar code is printed on paper tape and scanned and read by today's one-dimensional CCD scanner. The light emitted by CCD shines on the paper tape, and each photocell is aimed at different areas of the paper tape. Each photovoltaic cell outputs different patterns according to whether the bar code is printed on paper tape or not, and combines them to generate high-density information patterns. In this way, a single character can be printed in the same size space as a single bar in the early Comander code. Timing information is also included, so the whole process is reasonable. When the first system entered the market, the price of the whole set of equipment, including printing and reading equipment, was about ...
Question 8: Hello, one-dimensional code database, appearance:
One-dimensional code: One-dimensional code consists of vertical black bars and white bars, alternating with black and white, with stripes of different thicknesses. Usually there are English letters or * * * numbers under the stripes.
Two-dimensional code: The two-dimensional code is usually a square structure, which is not only composed of horizontal and vertical bar codes, but also has polygonal patterns in the code area. Similarly, the texture of the QR code is black and white, and the QR code is in the form of a dot matrix!
Function:
One-dimensional code: can identify the basic information of goods, such as the name and price of goods, but can not provide more detailed information of goods. To call more information, we need the further cooperation of computer database.
Two-dimensional code: not only has a unique identification function, but also can display more detailed product content. For example, clothes can not only show the name and price of clothes, but also show what materials are used, the percentage of each material, the size of clothes, what size people are suitable for wearing, and some washing precautions. , without the cooperation of computer database, simple and convenient.
One-dimensional code technology is mature, widely used and has little information, and only supports English or numbers.
The equipment cost is low, so it needs to be combined with computer database.
Two-dimensional code dot matrix graphics, high information density and large data volume.
Have the ability to correct errors, code patents, and pay.
The two-dimensional code cannot be changed after it is generated, and the security is high.
Support multiple languages, including English, Chinese, numbers, etc.
Question 9: One-dimensional codes starting with 6 made in China and starting with 4 in Hong Kong, do you still have 00-09 in the United States and Canada?
France 30-37
Germany 40~44
Japan 45-49
Britain and Ireland
Belgium/Luxembourg
Denmark
Finland
Norway
Sweden
Switzerland
Italy 80-83
Spain
Netherlands 87
Korea 88
Austria 90-9 1
Australia 93
New Zealand
Bulgaria 380
Slovenia 383 Croatia 385
Germany 400-440
Russia
Taiwan Province Province 47 1
Estonia 474
Latvia 475
Lithuania 477
Sri Lanka 479
the Philippines
Hong kong 489
Greece 520
Cyprus 529
Macedonia 53 1
Malta 535
Ireland 539
Portugal 560
Iceland 569
Poland 590
Romania 594
Hungary 599
South Africa 600-60 1
Mauritius 609
Morocco 6 1 1
Albania 6 13
Turkey 6 19869
Chinese mainland
Israel 729
Mexico 750
Venezuela 759
Colombia 770
Uruguay/Bolivia 773
Peru 775
Argentina 779
Chile 780
Paraguay 784
Ecuador 786
Brazil 789
Cuba 850
Slovakia 858
Czech 859
Yugoslavia 860
Korea 880
Thailand 885
Singapore 888
India 890
Malaysia 893
Indonesia 899
Vietnam 977