Boston: MIT scientists, including those of Indian-origin, have developed a wearable device, consisting of a 3D camera that could be a virtual 'guide dog' for visually impaired people navigating in real environments.  

The researchers also developed a low-power chip, for processing the 3D camera data, which consumes only one-thousandth as much power as a conventional computer processor executing the same algorithms. 

Using their chip, the researchers at the Massachusetts Institute of Technology (MIT) built a prototype of a complete navigation system for the visually impaired. About the size of a binoculars case and similarly worn around the neck, the system uses an experimental 3D camera.