QR কোডের তিন কোণে থাকে কালো বক্স, এর পিছনে কোন প্রযুক্তি লুকিয়ে রয়েছে জানেন?

According to Ei Samay, the three distinct black squares found at the corners of a QR code serve a critical function in the technology's operation. These squares are known as 'finder patterns' or 'position detection patterns,' and they allow a scanning device to identify the orientation and alignment of the code regardless of the angle from which it is scanned.

By locating these three specific markers, the software can determine the perspective of the image, enabling it to correct for distortion or rotation. This design ensures that a QR code can be read quickly and accurately by smartphones and scanners even if the code is tilted or partially obscured. The remaining space within the QR code is utilized to store the actual data, including error correction information that allows the code to be read even if a portion of it is damaged.

This technology, originally developed in Japan, has become a global standard for information exchange, ranging from digital payments to website redirection. Understanding the role of these corner boxes highlights the efficiency of the QR system, which was designed to be decoded at high speeds compared to traditional one-dimensional barcodes. As digital integration continues to grow, these structural elements remain fundamental to the reliability of contactless data transmission.