Communications of the ACM
Ntu Invention Transforms Plain Surfaces Into Low-Cost Touchscreens
The low-cost Speech Touch and Acoustic Tangible Interfaces for Next-generation Applications (STATINA) system hold the promise of being able to track the movements of multiple fingers and objects on a variety of flat surfaces.
Credit: Nanyang Technological University (Singapore)
Nanyang Technological University (NTU) researchers have developed Speech Touch and Acoustic Tangible Interfaces for Next-generation Applications (STATINA), a low-cost system based on the principles of vibration and imaging. The researchers say STATINA is able to track the movements of multiple fingers and objects and could turn a whiteboard, glass window, or a wooden tabletop into a responsive, touch-sensitive surface.
"It means in future, you could play computer games or draw sketches on walls or windows since almost all surfaces can be made touch-sensitive with our system," says NTU professor Andy Khong.
STATINA employs inexpensive vibration sensors and an algorithm that enable the system to pinpoint the location of a light tap on any surface. The researchers note that when outfitted with low-cost Web cameras, the system also can track the movements of multiple fingers or objects on any surface.
The researchers also have developed a signal-processing algorithm to determine the exact location of the initial point of impact.
From Nanyang Technological University (Singapore)
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