A tiny mobile projector beams out a figure that moves around a surface embedded with invisible infrared-absorbing sensors—a book, a desktop, a game board, a table, or a wall. A camera attached to the projector tracks the figure and reads the code printed in the infrared-absorbent ink, which causes the figure to interact meaningfully with the sensed object. A projected figure can track mud from an illustration of a puddle, or jump up and down on a paper trampoline.
The 2-D image uses anamorphic projection, an optical illusion dating back to Da Vinci's notebooks, to appear 3-D as it moves across the flat white backgrounds. While the Disney Research prototype, dubbed HideOut, is a handheld device, both the projector and the camera could be shrunk down into a mobile phone, and used for business as well as for child's play.
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