The barcode graph you see is placed at an exact distance and method to match the human-readable number below the image. Each store’s point-of-sale system database contains data (company name, price, replenishment information, etc.) that is directly linked to the UPC and EAN barcodes in your specific store. The laser in the registry reads the spaces/distances between all the barcode bars and then associates that identification number with what each individual store has in its database. If you have covered a single line of the barcode, it will not be scanned because you delete one of the digits needed to search for the item in the store record. 1D barcodes are a series of black and white barcodes that can store information such as the type, size, and color of a product.
Typically, the characters in barcode symbols consist of bar/space patterns. The most common linear barcode is the UPC barcode (also known as UPC-A). Keep in mind that there upc barcode are many other types of barcode languages. Just as English and French use the Roman character set, the different barcode languages use bar/space patterns to transmit data.
Start with the bars on the left, between the longer bars on the left and the longer bars in the middle. Start with the first white bar on the left and measure the thickness of each bar, black and white. Each digit in the 12-digit number you’re trying to find is encoded using four bars. Note the thickness of each rod and divide them into groups of four bars.
The simplest, easiest and still the best is to use Google.com. Google the barcode number of the item and see if it’s advertised in other stores. Sometimes this method only returns the name of the company or the name of the product, but that is the luck of the draw. If the barcode doesn’t store any data, where do the name, price, and inventory levels come from?
This price is agreed long before the item is shipped and placed on store shelves. This price data may vary from store to store, as some stores may have greater purchasing power or negotiate more favorable terms with the manufacturer. While there are barcode scanning apps that connect to databases found online, these are not the apps that stores use for their internal systems. Each store has its own internal database that they refer to for pricing and other information. In the past, UPC barcodes consisted of a manufacturer number, a product number and a check digit.