People who are blind or deal with low vision face a unique number of challenges in their daily lives, ranging from accessing published material to holding a job or living on one’s own.
However, emerging infrared technology under research could help the blind and visually impaired navigate the world around them using a pair of innovative goggles.
In new research recently published and yet to be peer-reviewed, Manuel Zahn and Armaghan Ahmad Khan at Germany’s Technical University of Munich explored how their 3D camera and haptic feedback armband can assist people with low vision.
“Even in the present era, visually impaired people face a constant challenge of navigation,” the pair wrote. “The most common tool available to them is the cane. Although the cane allows good detection of objects in the user’s immediate vicinity, it lacks the ability to detect obstacles further away.”
The two students’ design deploys two infrared cameras placed in a 3D-printed goggles prototype to get a stereoscopic view that is transformed by a small computer into a map of the user’s surroundings. The infrared gear also works in the dark. The armband then uses 25 actuators arranged in a grid that vibrates when users come close to objects while also assisting them in their orientation. As users walk near obstacles, the vibration intensity of the actuators increases.
In tests, subjects enjoyed roughly 98 percent accuracy while getting through obstacle pathways, with all five participants completing the course in their first run. After two additional runs, the volunteers were able to navigate the obstacles more rapidly.
Zahn and Khan frequently cited Microsoft’s Kinect motion detection system for the Xbox in their study, but the pair are confident that their own setup will be far smaller, cheaper and less conspicuous than the gaming device.
The new headset could offer an interesting opportunity for blind and partially sighted people to clear the myriad obstacles they face when performing regular tasks or navigating the world around them.
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