Barcodes are a form of visual coding. Information is encoded in visual patterns that machines can read, gather and store in a central digital database. The visual patterns can be read by machines using either laser or imaging technology. Laser barcode scanners illuminate the barcode label with a red light that is reflected back to the scanner for decoding. Image scanners capture the image of the barcode using a digital camera (scanning a QR code with your smartphone, for example).Whether the barcode information is gathered with a laser or camera, the signal is then decoded and sent to a digital database stored on computer software or a device app.
An example of a barcode reader is a supermarket barcode scanner that reads and logs the price of a product. The picture is an example of a barcode reader from HP. Today, many smartphones with the proper apps are also capable of scanning and reading barcodes.
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