Communications of the ACM
Turning the Tables into Touchscreens
Scientists at Japan's Nara Institute of Science and Technology are using a synchronized projector and camera to produce a touchscreen-like interface on any flat surface.
Credit: Nara Institute of Science and Technology
Scientists at Japan's Nara Institute of Science and Technology (NAIST) have built a touchscreen-like interface that can operate on any flat surface via a projector synchronized with a single camera.
The researchers exploited this synchronization, or slope disparity gating, so the projector scans only the table's surface and slightly above it.
A dedicated image-processing algorithm enables the touch of a finger to be efficiently localized; the researchers said employing the same light source to generate the projected video and to detect touch ensures the image does not mislead the algorithm.
NAIST's Yasuhiro Mukaigawa said, "In the future, we will hope to expand to include touchless operations or even add gesture recognition."
From Nara Institute of Science and Technology (Japan)
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