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:
“The real writer is one
who really writes. Talent
is an invention like phlogiston
after the fact of fire.
Work is its own cure. You have to
like it better than being loved.”
—Marge Piercy (b. 1936)
“A sudden silence in the middle of a conversation suddenly brings us back to essentials: it reveals how dearly we must pay for the invention of speech.”
—E.M. Cioran (b. 1911)
“Out of countless memories, invention selects a few that become “the story of my life.””
—Mason Cooley (b. 1927)