Fujitsu Laboratories has developed a new technology for sending information via video. The company aims to make this technology practical in 2013, as an easy means of transmitting information between smartphones and TVs.
"Currently, if you see a TV commercial and want to get more information afterwards, the main way is to enter keywords in search sites. But with this technology, if you see a commercial that interests you, you can get more information just by pointing your smartphone at the TV."
The same thing can be done using visible light communication, digital watermarks, and QR codes. But those all require special receivers, and because they embed noise in the picture, they may affect its quality. Also, such items can’t be read unless the camera is close to them.