Consequently, QR codes can be decoded by scanning vertically and horizontally and do not require the orientation positioning required of linear barcodes. The scanning technology used for QR codes is camera-based. Unlike linear barcodes which contain information accessed in some data tables, QR codes normally encode the actual information, ranging from web address to mapping coordinates. ![]() The QR code (Quick Response Code) is a two-dimensional symbol that can contain a wider range of encoded data. Light-based readers beam a red laser over the symbol to decode the barcode data so the corresponding information can be obtained from a database. The technology to “read” or scan a linear barcode is based on reflectance properties contrasting dark bars on a light background. ![]() Linear barcodes, such as UPC barcodes, are symbols that typically contain numeric or alphanumeric data adhering to some identification guidelines.
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