If you’ve been to a supermarket, you’ve probably seen the machines they use when you are paying at the counter. The goods bought are usually passed through a scanner for identification. These scanners are what are referred to as code scanners. Most people have definitely asked at one time or the other, “How to do code scanners work?” These scanners were invented in 1994 and were initially made to track motor vehicles during the process of manufacture. Apparently, they have evolved over the years into useful commerce tools.
Examples of Some of the Scanners
Bar code: Reads Barcodes that are printed.
QR code: Commonly used in operating systems in the mobile smart phone.
Raster Scan Pattern: Mostly used in printers and other system.
Uses of Code Scanners
Used in consumer advertising as well as packaging
Used in mobile phones thus providing fast access to the phones brand on the web
Used in transportation ticketing
Used by most governments to store information
How Bar Code Scanner Work
In simple terms, when an item is passed through the code scanner, there is a reflection that is sent back for conversion in the scanner. The scanner, in turn, converts the information to into a machine-readable form. This information is then decoded using mathematical algorithms to determine the validity and meaning of the barcode. The output is then given in the form of human readable text or sound.
How QR Code Scanners Work
QR codes are usually used in mobile smart phones. The phones have applications meant to decode these codes using the devices camera. The process is generally the same as the one used in the Barcode code scanner. The only difference is that this type of scanner is used in a mobile phone to ease the access of displaying web addresses (URL).
In most of these scanners today, the targeted object for scanning is covered by the sensor, which in turn generates a wave form of two dimensions. The converter then receives an analogue signal, which is converted into a digital signal. This signal is now the exact form of that was received from the scanned object/image. After that, the digital signal is sent to the decoder that converts it to text.
Some of the QR codes’ URLs and storing addresses can be seen in magazines, buses, business cards or signs are any other object that users might need information from. Users with smart phones with the right applications can use its camera to scan QR code images. They can then read this information on their phones instantly. So, there you have it. Now you have the answer to the question, “How to do code scanners work?”.