扫了这么多年，二维码还没用完？

Core Viewpoint - The article discusses the significance and functionality of QR codes in modern society, highlighting their integration into various aspects of daily life and industry, and the complex systems that support their use [7][8][50]. Group 1: Evolution of QR Codes - QR codes emerged as a solution to the limitations of barcodes, which could only store minimal information and were one-dimensional [19][20]. - The invention of QR codes in 1994 by Masahiro Hara was driven by the need for a more efficient way to manage parts in manufacturing, allowing for two-dimensional data storage [20][22]. - QR codes can store a vast amount of information due to their design, which allows for multiple combinations of black and white modules [48][49]. Group 2: Functionality and Standards - QR codes operate on the ISO/IEC 18004 standard, which ensures that any device can recognize and decode them, but does not guarantee the interpretation of the content [27][29]. - The application layer determines how the decoded information is used, which can vary between different platforms like WeChat and Alipay [33][36]. - QR codes have a built-in error correction mechanism, allowing them to be scanned even if partially damaged [38][41]. Group 3: Daily Usage and Impact - The article estimates that billions of scans occur daily across various sectors, including logistics, manufacturing, and personal transactions [44][46]. - The design of QR codes ensures that they will not run out of combinations, addressing concerns about their longevity in usage [46][49]. - The process of scanning a QR code involves capturing an image, decoding it, and executing commands, all of which happen in less than a second [62][53][55]. Group 4: Challenges and Considerations - The increasing frequency of QR code usage raises concerns about energy security, as the data generated requires significant storage and processing power [63][68]. - Data security is another critical issue, as the aggregation of personal data through QR code interactions poses risks of misuse [71][72]. - The article emphasizes that technological advancements, such as facial recognition and palm payment, rely on the same underlying systems as QR codes, showcasing the complexity of modern digital interactions [75][77].