Final answer:
Optical sensors and image processing algorithms are used to detect the position of each cell in a QR Code.
Step-by-step explanation:
The position of each cell in a QR Code is detected using a combination of optical sensors and image processing algorithms.
When a QR Code is scanned, the optical sensors capture the pattern of black and white modules in the code. These modules represent the individual cells of the QR Code.
The image processing algorithms analyze the captured pattern to identify the position of each cell and decode the information stored within the code.