You can already control your mobile devices with touch, gesture, or voice commands. Now Finnish researcher Olli Lahdenoja is introducing another mechanism: facial recognition. Lahdenoja, a researcher at the University of Turku, has published a doctoral dissertation which develops a facial recognition method that can fit onto a single electronic chip. The system has the potential to be used in devices such as smartwatches, as well as mobile handsets, thanks to its compact size and low power consumption. "[Using this system] a smartwatch could, for example, switch on when a user looks at it. What's more, the recognition system could be used to identify a person when they access an online service," says Lahdenoja.