A Cane for the Blind that Senses Tall Obstacles

As an undergraduate studying computer science and engineering in New Delhi, Rohan Paul, the son of two doctors, took on a class project working with the blind. He learned that the white cane, which many visually impaired people depend on for mobility, has a major shortcoming: It doesn’t allow users to detect obstacles at or above knee level, such as tree branches, road barriers, car doors and clotheslines…

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