ĭuring the month of June 2011, 14 million American mobile users scanned a QR code or a barcode. The QR code has become one of the most-used types of two-dimensional code.
#PASSWORDS PLUS ERROR CODE 40 SOFTWARE#
There are a great many QR code generators available as software or as online tools that are either free, or require a paid subscription. QR codes may be used to display text to the user, to open a webpage on the user's device, to add a vCard contact to the user's device, to open a Uniform Resource Identifier (URI), to connect to a wireless network, or to compose an email or text message. QR codes are now used in a much broader context, including both commercial tracking applications and convenience-oriented applications aimed at mobile-phone users (termed mobile tagging). QR codes are showing up on buildings, as this one being painted in Cape Town
The required data is then extracted from patterns that are present in both horizontal and vertical components of the image. Ī QR code consists of black squares arranged in a square grid on a white background, which can be read by an imaging device such as a camera, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. Applications include product tracking, item identification, time tracking, document management, and general marketing. The Quick Response system became popular outside the automotive industry due to its fast readability and greater storage capacity compared to standard UPC barcodes. QR codes use four standardized encoding modes (numeric, alphanumeric, byte/binary, and kanji) to store data efficiently extensions may also be used. In practice, QR codes often contain data for a locator, identifier, or tracker that points to a website or application. A barcode is a machine-readable optical label that can contain information about the item to which it is attached.
QR code for the URL of the English Wikipedia Mobile main pageĪ QR code (an initialism for quick response code) is a type of matrix barcode (or two-dimensional barcode) invented in 1994 by the Japanese automotive company Denso Wave.
0 kommentar(er)
