A QR code (Quick Response code) is a two-dimensional barcode that stores information in a grid of black and white squares, allowing data to be encoded both horizontally and vertically for higher capacity and faster scanning compared to traditional barcodes. Invented in 1994 by Masahiro Hara at Denso Wave, QR codes were initially used for tracking automotive parts but have since become widely used in everyday applications such as payments, marketing, and information sharing. Their design includes special patterns that enable quick detection, orientation, and error correction, making them highly reliable even when partially damaged. Today, QR codes serve as a bridge between the physical and digital worlds, enabling users to instantly access information or perform actions by simply scanning them with a smartphone
Rakesh V S (Thu,) studied this question.