Invention
The QR Code was invented in Japan by the Toyota subsidiary Denso Wave in 1994 to track vehicles during the manufacturing process, and was originally designed to allow components to be scanned at high speed. It has since become one of the most popular types of two-dimensional barcodes.
Unlike the older one-dimensional barcode that was designed to be mechanically scanned by a narrow beam of light, the QR code is detected as a 2-dimensional digital image by a semiconductor image sensor and is then digitally analyzed by a programmed processor. The processor locates the three distinctive squares at the corners of the image, and uses a smaller square near the fourth corner to normalize the image for size, orientation, and angle of viewing. The small dots are then converted to binary numbers and validity checked with an error-correcting code.
Read more about this topic: QR Code
Famous quotes containing the word invention:
“We have much studied and much perfected, of late, the great civilized invention of the division of labour; only we give it a false name. It is not, truly speaking, the labour that is divided; but the men.”
—John Ruskin (1819–1900)
“Justice is a moral virtue, merely because it has that tendency to the good of mankind, and indeed is nothing but an artificial invention to that purpose. The same may be said of allegiance, of the laws of nations, of modesty, and of good manners. All these are mere human contrivances for the interest of society.”
—David Hume (1711–1776)
“When she asked him about birth control, he sat down beside her and talked for half an hour about what a great woman Margaret Sanger was and how birthcontrol was the greatest single blessing to mankind since the invention of fire.”
—John Dos Passos (1896–1970)