Want to show that must-see video to your friends, but don't want to
crowd around a tiny screen? Or perhaps you have an important document
on your handset to share during a large meeting. You could try a phone with a built-in projector, but wouldn't it be easier to use your regular device? Now you can, thanks to "virtual projection", a system for sharing your screen on to any nearby display.
It
works like this: when you hold your phone up to the screen of a
computer running the virtual projection software, the phone's camera
constantly captures and compares images from the screen to work out its
location. This information is passed back to the computer via Wi-Fi to
place the virtual projection in the right place on the screen.
Moving
the phone will rotate and distort the image just like a regular optical
projector, but it is also possible to turn this off, giving you a
stable image even if you move and allowing you to put the phone down.
Multiple users can also place images on the same screen, allowing them
to work together.http://www.newscientist.com/
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