kuvakoodi

Kuvakoodi, often referred to as a QR code (Quick Response code), is a type of two-dimensional barcode. It was invented by Denso Wave, a subsidiary of Toyota, in 1994. Unlike traditional one-dimensional barcodes that store limited information, QR codes can store significantly more data, including text, URLs, contact information, and Wi-Fi credentials.

The structure of a QR code consists of a matrix of black squares arranged on a white background. These squares represent binary data that can be decoded by a scanner, typically a smartphone camera. The distinct patterns at three corners of the code enable quick and accurate reading, even if the code is partially damaged or viewed at an angle.

QR codes are widely used for various purposes. They commonly appear on advertisements, product packaging, and websites to provide quick access to online content, download apps, or make payments. Their ease of use and versatility have made them a popular tool for bridging the physical and digital worlds. Information encoded in a QR code is retrievable in a matter of seconds by simply pointing a compatible device at the code.

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