Matrix codes link real world to virtual one

A mobile phone reads a matrix code on a window sign at Philz Coffee in San Francisco. Google Places is using QR Codes to link the real world to the online world. (Jeff Chiu/Associated Press)

Mosaics of black-and-white squares, like tiny crossword puzzles, seem to have cropped up everywhere, from bus stop ads to newspapers to stickers on bananas.

The two-dimensional matrix codes are a way to encode information in print in a way that can be quickly scanned by a computer. The codes come in various forms, most of them using black and white squares, but some using hexagons or multi-coloured triangles.

One of the most popular is the QR Code, distinguished by the large squares in three of the code’s corners.

via CBC News – Technology & Science – Matrix codes link real world to virtual one.