The concept is apparently simple and two prototypes have been successfully tested. Laser and digital video cameras become the eyes for the blind man and see the objects and activity going on around him.
Researchers from the University of Bristol have developed powerful real-time image processing and some clever algorithms to then identify objects and obstacles, such as trees, street furniture, vehicles and people. The system uses the stereo images to create a “depth map” for calculating distances. The system can also analyse moving objects and predict where they are going.
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Sound imaging: clever acoustics help blind people see the world (w/ Video)--continues at this link: