Hand-held device projects images that respond to the real world

from NewScientist:

The device – called Twinkle – projects animated graphics that respond to patterns, shapes or colours on a surface, or even 3D objects such as your hand.

It uses a camera to track relevant elements – say a line drawn on a wall – in the scene illuminated by the projector and an accelerometer ensures it can sense the projector’s rapid motion and position.

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