Google's Project Tango: 3D mapping on a smartphone

Google has unveiled a prototype smartphone fitted with 3D sensors as part of its Project Tango - which aims to give mobile devices a human-scale understanding of space and motion.

The phone emits pulses of infrared light and records how it is reflected back allowing it to build a detailed depth map of the surrounding space.

BBC Click's Spencer Kelly reports.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

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