How does an OMR scanner with hardware work?

Barcode scanners use Laser lights to scan barcodes and get information from them.

The major difference between rf scanners and barcode scanners is how they operate. Barcode scanners use lasers to scan barcodes that are black and white in color. RF scanners use radio frequency to detect tags and then get information.

Supermarket barcode scanners do not require AI because there is no autonomous activity in scanning barcodes. Barcode scanners used in supermarkets are mostly laser or image-based scanners that only have to read the barcode correctly.

A standard barcode scanner cannot read QR codes because QRs consist of dots, squares, hexagons, and other shapes which are only read by 2D scanners. A regular barcode scanner is scanned by 1D scanners because they are made of only lines with different thicknesses.

Barcode scanners do not use Wi-Fi. For connecting to the computer, they might use a keyboard or serial ports for wired connection or Bluetooth for wireless connection. For scanning the code, these scanners use light and convert light energy to electrical energy which further is converted into data.