Blinds people need some aid to interact with their environment with more security. A new device is then proposed to enable them to see the world with their ears. Considering not only system requirements but also technology cost, we used, for the conception of our tool, ultrasonic sensors and one monocular camera to enable user being aware of the presence and nature of potential encountered obstacles. In this paper, a comprehensive survey has been done on staircase detection using mobile phone camera as well as previous work is studied thoroughly.
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Stair detection, obstacle detection, visually impaired, blind.