Image
EAN-130000002088587   EAN-13 barcode 0000002088587
UPC-A000002088587   UPC-A barcode 000002088587
Product NameSupreme Vinyl Cast Boot Large
CategoryMedical Supplies / Equipment / Bandages
Short Description07 In
Amazon.comA Buy on Amazon ~ B003BQIVTW
Price New100.00 US Dollars    (curriencies)
Features
  • Excellent for use with fiberglass casts or bulky compression bandages.
  • Rocker sole is designed to help promote a natural gait.
  • Open toe and closed heel.
  • Weatherproof, stretchable upper.
  • Loop/lock contact closure
Long DescriptionSupreme Vinyl Cast Boot is designed for use with thinner casting materials such as polyester or fiberglass cast. Conforms to any casting material. Waterproof, stretchable upper, Non-skid outsole & lightweight. Open toe and closed heel.XSmall fits Women's shoe size 3 - 5, Small fits Women's shoe size 5.5 - 8, Medium fits Men's shoe size 6 - 8 and Women's shoe size 8.5 - 10, Large fits Men's shoe size 8.5 - 11 , XLarge fits Men's shoe size 11.5 - 14
Created07-01-2006
Modified12-08-2016 10:10:03pm
MD54b318fa5821e0d4151507bd7cc285153
SHA256d2ba24b716f10bea0b3f951746681e7d98d5a5c6af9870a8b50a44d0a415dbaa
Search Googleby EAN or by Title
Query Time0.0007410

Barcodes are a graphical representation of information that can be easily read by machines. People read text easy enough but machines find this to be too complex so we use barcodes to simplify the process.

Barcodes can store numbers, letters and all the special characters. What can be stored in the barcode depends on which type of barcode is being used. But the basics of how a barcode works is the same regardless of what type of code it is, what information is stored in the barcode or what type of scanner is being used.

barcode scanIt all starts with the scan. The scanner, regardless of which type you are using, will examine the barcode image. The lines (or blocks in the case of 2D barcodes) will either reflect or absorb light. When we look at the barcode, we tend to see the dark stripes and think of those as the important parts. Those are the parts that absorb the light and the white parts reflect the light. So the scanners tend to see the barcodes in reverse of how we think of them. But the dark and light portions of the code on their own don't automatically become the information stored in the code. In most cases, it is the relative placement and size of each dark and light stripe (or block) that make up the information. There are also special markers that help the scanner know which direction the barcode is facing when it is scanned. This allows the scanning process to work even if the barcode is upside down when it is scanned. The scanner simply processes the scanned data in reverse in this case.

barcode oscolloscopeTaking a look at an oscolloscope screen as a scanner passes over barcode, you can see that the stripes reflect back light and the scanner registers the changes as high and low levels. So what looks like a simple image is really a rather complex set of layered encryption to store the data. The encryption isn't done to hide the information in this case. Instead it is done to make it easy for the machine to read the information. Since the base language of machines is binary (1 and 0) it is easy for them to read this type of information even if it takes several steps to turn this back into something that people can understand.

binaryThe size of each high and low are combined to make binary data. A series of 1 (one) and 0 (zero) values which are strung together then decoded into the actual information. Up to this point, the process is the same for all barcodes regardless of how they are stored. Getting the lines or dots into binary is the easy part for the machine. The next step is to make this binary code into something useful to people. That step depends on  which type of barcode is being scanned. Each type of barcode has its own encoding methode. Just like human languages, what seems to be two similar words (or barcodes in this case) could actually be two very different values even though they have the same basic letters (or bars).

So you can see that the scanning devices need to know not only how to turn the bars or dots into binary, but after they have done that they need to know how to turn that binary string into the original information. But regardless of the encoding process the basic steps are the same. Process the light and dark areas, convert them to binary, decode the binary, pass the information on to the receiving device which is normally a computer program of some sort.

Once the decoded data reaches the computer program, there is no telling how the information is to be used. The grocery store will use the information to keep track of the products you purchased as you go through the register. A manufacturer will use the code to identify where they are storing their parts. And shipping companies use the codes to keep track of the packages they are delivering.

Now that you know a little about the mechanical portion of the process, take some time to learn about the different types of barcode scanners and the different ways the information can be encoded into barcodes.

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