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Computer-Aided Glasses Allow Blind To Detect Moving Objects
By admin | August 11, 2008
Researchers at Philips Electronics in Germany have designed a set of body-worn sensors that alerts them to objects that are moving in their surroundings. The team, led by Richard Daniel Willman has recently filed a patent on their device.
Already existing “electronic canes” are limited by their inability to discriminate stationary from moving objects. Using a series of sensors, the Philips device allows the visually impaired to determine the spatial orientation of moving objects. Two orientation sensors detect the position of the head and trunk of the person. A third detector is used to register motion in the surroundings.
The sensor worn on the head and trunk are vector magnetometers that detect changes in magnetic fields, which are coupled with an accelerometer. The movement detected is computed by a microprocessor using optical flow, which estimates the motion of objects with a visual representation. An assistance device (worn as a wristband) provides feedback to the person when a collision is possible through a wireless personal network.
Copyright 2008 Medgizmo.com
Topics: Rehabilitation, Visual Impairement |
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