This article will explain what decoding bar code, by which simplify the recording of information.
barcode called encoded information read by special devices.It is applied to the package, it has the form of strokes.The bar code can encode information about some of the important parameters of the products.
most common EAN (European coding system) and American Universal Product Code UPC.
How is the transcript of the bar code?About this below.
The structure of the encoded information includes:
- the country code of the manufacturer, typically two or three digits;
- manufacturer's code - a four or five digits - it all depends on the length of the country code;
- further five digits - the name of the product, its color, weight, size, and consumer properties;
- The eighth and last digit - control, which is used to verify the correctness of the read barcode scanner.
Sometimes the right is a sign of «& gt;», which means that the release of the goods under license.
Decoding barcode provides a lot of important information about the product.
order to verify the true bar code or not, you must perform the following calculations.Fold all the figures, which are located on even ground.Then multiply the total by three.Save the result, we will call it "X".
Then fold the numbers (but without reference numbers), located on odd places, to this amount we add the number "X" obtained previously.From the sum, which turned out (we call it «YZ»), leaving only Z. Then perform a simple action: 10- Z.
If the figure that has been obtained, matches the checksum listed in the bar code, theproduct is genuine.If it does not match, then this product has been made without complying with the law.
Decoding barcode can reveal information about the country in which manufactured goods, business identification number, the name of the product.
This encoding information is used worldwide.So, consider the types of bar codes.
One simple barcode is "2 of 5".Signs that indicate the numbers from zero to nine, in themselves contain five strokes, two of which are wide, and three - narrow.
gaps that are between strokes, do not carry any information and is generally equal to the width of the gap width of the narrow bar.This code, in addition to numbers contain signs of "start" and "stop."Total three strokes are used in their image, two of which are wide.Gaps of information do not bear the code "2 of 5" number of discrete, so it simplifies printing and single errors are automatically detected.
Currently barcode of goods can also be multi-colored.
code "Codabar" is a discrete semielementnym barcode.It contains numbers from zero to nine, the sign "-" and "+", ".", "/", ":" 4 digits "start / stop" and the dollar sign.Left and right are limited to a bar code symbol "Codabar".The sign looks like a four-stroke and three spaces.
bar code "39" is so named because of the structure of the image of characters "3 and 9," where are the three broad elements (one blank and two strokes) of the nine narrow - the other six.This code is reliable enough, what manifested its advantage.Also, the reliability of such a code can be increased by adding a control character in the symbol.
Barcode Product is a way of recording information.
special place among the various systems, bar coding takes the bar code "93".With the same set of information digits as the code "39", it can provide a high image density symbols.Forty-eight characters portrayed in the code "93".It includes signs "start / stop" control sign four and forty three digits of the code "39".
to encode one hundred twenty-eight different characters associated bar code name "128".The code "128" - is uncontrolled and continuous code.Its signs include three bars and three spaces, and the length of each is equal to eleven modules.
We reviewed some types of bar codes, enjoyed throughout the world.
